Articles | Volume 19, issue 18
https://doi.org/10.5194/bg-19-4589-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-19-4589-2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
27 Sep 2022
Research article |
| 27 Sep 2022
| 27 Sep 2022
A Numerical reassessment of the Gulf of Mexico carbon system in connection with the Mississippi River and global ocean
Le Zhang
Department of Oceanography and Coastal Sciences, Louisiana State
University, Baton Rouge, LA 70803, USA
Department of Oceanography and Coastal Sciences, Louisiana State
University, Baton Rouge, LA 70803, USA
Center for Computation and Technology, Louisiana State University,
Baton Rouge, LA 70803, USA
Coastal Studies Institute, Louisiana State University, Baton Rouge, LA
70803, USA
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Biogeosciences, 17, 5043–5055, https://doi.org/10.5194/bg-17-5043-2020, https://doi.org/10.5194/bg-17-5043-2020, 2020
Yanda Ou and Z. George Xue
Biogeosciences, 21, 2385–2424, https://doi.org/10.5194/bg-21-2385-2024, https://doi.org/10.5194/bg-21-2385-2024, 2024
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Developed for the Gulf of Mexico (2006–2020), a 3D hydrodynamic–biogeochemical model validated against in situ data reveals the impact of nutrients and plankton diversity on dissolved oxygen dynamics. It highlights the role of physical processes, sediment oxygen consumption, and nutrient distribution in shaping bottom oxygen levels and hypoxia. The model underscores the importance of complex plankton interactions for understanding primary production and hypoxia evolution.
Yanda Ou, Bin Li, and Z. George Xue
Biogeosciences, 19, 3575–3593, https://doi.org/10.5194/bg-19-3575-2022, https://doi.org/10.5194/bg-19-3575-2022, 2022
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Over the past decades, the Louisiana–Texas shelf has been suffering recurring hypoxia (dissolved oxygen < 2 mg L−1). We developed a novel prediction model using state-of-the-art statistical techniques based on physical and biogeochemical data provided by a numerical model. The model can capture both the magnitude and onset of the annual hypoxia events. This study also demonstrates that it is possible to use a global model forecast to predict regional ocean water quality.
Zhengchen Zang, Z. George Xue, Kehui Xu, Samuel J. Bentley, Qin Chen, Eurico J. D'Sa, Le Zhang, and Yanda Ou
Biogeosciences, 17, 5043–5055, https://doi.org/10.5194/bg-17-5043-2020, https://doi.org/10.5194/bg-17-5043-2020, 2020
Zuo Xue, Ruoying He, Katja Fennel, Wei-Jun Cai, Steven Lohrenz, Wei-Jen Huang, Hanqin Tian, Wei Ren, and Zhengchen Zang
Biogeosciences, 13, 4359–4377, https://doi.org/10.5194/bg-13-4359-2016, https://doi.org/10.5194/bg-13-4359-2016, 2016
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In this study we used a state-of-the-science coupled physical–biogeochemical model to simulate and examine temporal and spatial variability of sea surface CO2 concentration in the Gulf of Mexico. Our model revealed the Gulf was a net CO2 sink with a flux of 1.11 ± 0.84 × 1012 mol C yr−1. We also found that biological uptake was the primary driver making the Gulf an overall CO2 sink and that the carbon flux in the northern Gulf was very susceptible to changes in river inputs.
Z. Xue, R. He, K. Fennel, W.-J. Cai, S. Lohrenz, and C. Hopkinson
Biogeosciences, 10, 7219–7234, https://doi.org/10.5194/bg-10-7219-2013, https://doi.org/10.5194/bg-10-7219-2013, 2013
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Biogeochemistry: Coastal Ocean
Technical note: Ocean Alkalinity Enhancement Pelagic Impact Intercomparison Project (OAEPIIP)
Estimates of carbon sequestration potential in an expanding Arctic fjord (Hornsund, Svalbard) affected by dark plumes of glacial meltwater
An assessment of ocean alkalinity enhancement using aqueous hydroxides: kinetics, efficiency, and precipitation thresholds
Dissolved nitric oxide in the lower Elbe Estuary and the Port of Hamburg area
Variable contribution of wastewater treatment plant effluents to downstream nitrous oxide concentrations and emissions
Distribution of nutrients and dissolved organic matter in a eutrophic equatorial estuary: the Johor River and the East Johor Strait
Investigating the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification
Ocean alkalinity enhancement using sodium carbonate salts does not lead to measurable changes in Fe dynamics in a mesocosm experiment
Quantification and mitigation of bottom-trawling impacts on sedimentary organic carbon stocks in the North Sea
Influence of ocean alkalinity enhancement with olivine or steel slag on a coastal plankton community in Tasmania
Multi-model comparison of trends and controls of near-bed oxygen concentration on the northwest European continental shelf under climate change
Picoplanktonic methane production in eutrophic surface waters
Vertical mixing alleviates autumnal oxygen deficiency in the central North Sea
Hypoxia also occurs in small highly turbid estuaries: the example of the Charente (Bay of Biscay)
Seasonality and response of ocean acidification and hypoxia to major environmental anomalies in the southern Salish Sea, North America (2014–2018)
Oceanographic processes driving low-oxygen conditions inside Patagonian fjords
Above- and belowground plant mercury dynamics in a salt marsh estuary in Massachusetts, USA
Variability and drivers of carbonate chemistry at shellfish aquaculture sites in the Salish Sea, British Columbia
Unusual Hemiaulus bloom influences ocean productivity in Northeastern US Shelf waters
Insights into carbonate environmental conditions in the Chukchi Sea
UAV approaches for improved mapping of vegetation cover and estimation of carbon storage of small saltmarshes: examples from Loch Fleet, northeast Scotland
Iron “ore” nothing: benthic iron fluxes from the oxygen-deficient Santa Barbara Basin enhance phytoplankton productivity in surface waters
Marine anoxia initiates giant sulfur-oxidizing bacterial mat proliferation and associated changes in benthic nitrogen, sulfur, and iron cycling in the Santa Barbara Basin, California Borderland
Riverine nutrient impact on global ocean nitrogen cycle feedbacks and marine primary production in an Earth System Model
The Northeast Greenland shelf as a late-summer CO2 source to the atmosphere
Uncertainty in the evolution of northwestern North Atlantic circulation leads to diverging biogeochemical projections
The additionality problem of ocean alkalinity enhancement
Short-term variation in pH in seawaters around coastal areas of Japan: characteristics and forcings
Revisiting the applicability and constraints of molybdenum- and uranium-based paleo redox proxies: comparing two contrasting sill fjords
Influence of a small submarine canyon on biogenic matter export flux in the lower St. Lawrence Estuary, eastern Canada
Single-celled bioturbators: benthic foraminifera mediate oxygen penetration and prokaryotic diversity in intertidal sediment
Assessing impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: a case study in the Hinase area, Okayama Prefecture, and Shizugawa Bay, Miyagi Prefecture, Japan
Multiple nitrogen sources for primary production inferred from δ13C and δ15N in the southern Sea of Japan
Influence of manganese cycling on alkalinity in the redox stratified water column of Chesapeake Bay
Estuarine flocculation dynamics of organic carbon and metals from boreal acid sulfate soils
Drivers of particle sinking velocities in the Peruvian upwelling system
Impacts and uncertainties of climate-induced changes in watershed inputs on estuarine hypoxia
Considerations for hypothetical carbon dioxide removal via alkalinity addition in the Amazon River watershed
High metabolism and periodic hypoxia associated with drifting macrophyte detritus in the shallow subtidal Baltic Sea
Production and accumulation of reef framework by calcifying corals and macroalgae on a remote Indian Ocean cay
Zooplankton community succession and trophic links during a mesocosm experiment in the coastal upwelling off Callao Bay (Peru)
Temporal and spatial evolution of bottom-water hypoxia in the St Lawrence estuarine system
Significant nutrient consumption in the dark subsurface layer during a diatom bloom: a case study on Funka Bay, Hokkaido, Japan
Contrasts in dissolved, particulate, and sedimentary organic carbon from the Kolyma River to the East Siberian Shelf
Sediment quality assessment in an industrialized Greek coastal marine area (western Saronikos Gulf)
Limits and CO2 equilibration of near-coast alkalinity enhancement
Role of phosphorus in the seasonal deoxygenation of the East China Sea shelf
Interannual variability of the initiation of the phytoplankton growing period in two French coastal ecosystems
Spatio-temporal distribution, photoreactivity and environmental control of dissolved organic matter in the sea-surface microlayer of the eastern marginal seas of China
Metabolic alkalinity release from large port facilities (Hamburg, Germany) and impact on coastal carbon storage
Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz
Biogeosciences, 21, 3665–3676, https://doi.org/10.5194/bg-21-3665-2024, https://doi.org/10.5194/bg-21-3665-2024, 2024
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Ocean alkalinity enhancement (OAE) is an emerging marine CO2 removal method, but its environmental effects are insufficiently understood. The OAE Pelagic Impact Intercomparison Project (OAEPIIP) provides funding for a standardized and globally replicated microcosm experiment to study the effects of OAE on plankton communities. Here, we provide a detailed manual for the OAEPIIP experiment. We expect OAEPIIP to help build scientific consensus on the effects of OAE on plankton.
Marlena Szeligowska, Déborah Benkort, Anna Przyborska, Mateusz Moskalik, Bernabé Moreno, Emilia Trudnowska, and Katarzyna Błachowiak-Samołyk
Biogeosciences, 21, 3617–3639, https://doi.org/10.5194/bg-21-3617-2024, https://doi.org/10.5194/bg-21-3617-2024, 2024
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The European Arctic is experiencing rapid regional warming, causing glaciers that terminate in the sea to retreat onto land. Due to this process, the area of a well-studied fjord, Hornsund, has increased by around 100 km2 (40%) since 1976. Combining satellite and in situ data with a mathematical model, we estimated that, despite some negative consequences of glacial meltwater release, such emerging coastal waters could mitigate climate change by increasing carbon uptake and storage by sediments.
Mallory C. Ringham, Nathan Hirtle, Cody Shaw, Xi Lu, Julian Herndon, Brendan R. Carter, and Matthew D. Eisaman
Biogeosciences, 21, 3551–3570, https://doi.org/10.5194/bg-21-3551-2024, https://doi.org/10.5194/bg-21-3551-2024, 2024
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Ocean alkalinity enhancement leverages the large surface area and carbon storage capacity of the oceans to store atmospheric CO2 as dissolved bicarbonate. We monitored CO2 uptake in seawater treated with NaOH to establish operational boundaries for carbon removal experiments. Results show that CO2 equilibration occurred on the order of weeks to months, was consistent with values expected from equilibration calculations, and was limited by mineral precipitation at high pH and CaCO3 saturation.
Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange
Biogeosciences, 21, 3425–3440, https://doi.org/10.5194/bg-21-3425-2024, https://doi.org/10.5194/bg-21-3425-2024, 2024
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Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. Dissolved NO was supersaturated in the Elbe Estuary, indicating that it is a source of atmospheric NO. The observed distribution of dissolved NO most likely resulted from nitrification.
Weiyi Tang, Jeff Talbott, Timothy Jones, and Bess B. Ward
Biogeosciences, 21, 3239–3250, https://doi.org/10.5194/bg-21-3239-2024, https://doi.org/10.5194/bg-21-3239-2024, 2024
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Wastewater treatment plants (WWTPs) are known to be hotspots of greenhouse gas emissions. However, the impact of WWTPs on the emission of the greenhouse gas N2O in downstream aquatic environments is less constrained. We found spatially and temporally variable but overall higher N2O concentrations and fluxes in waters downstream of WWTPs, pointing to the need for efficient N2O removal in addition to the treatment of nitrogen in WWTPs.
Amanda Y. L. Cheong, Kogila Vani Annammala, Ee Ling Yong, Yongli Zhou, Robert S. Nichols, and Patrick Martin
Biogeosciences, 21, 2955–2971, https://doi.org/10.5194/bg-21-2955-2024, https://doi.org/10.5194/bg-21-2955-2024, 2024
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We measured nutrients and dissolved organic matter for 1 year in a eutrophic tropical estuary to understand their sources and cycling. Our data show that the dissolved organic matter originates partly from land and partly from microbial processes in the water. Internal recycling is likely important for maintaining high nutrient concentrations, and we found that there is often excess nitrogen compared to silicon and phosphorus. Our data help to explain how eutrophication persists in this system.
Aaron Ferderer, Kai G. Schulz, Ulf Riebesell, Kirralee G. Baker, Zanna Chase, and Lennart T. Bach
Biogeosciences, 21, 2777–2794, https://doi.org/10.5194/bg-21-2777-2024, https://doi.org/10.5194/bg-21-2777-2024, 2024
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Ocean alkalinity enhancement (OAE) is a promising method of atmospheric carbon removal; however, its ecological impacts remain largely unknown. We assessed the effects of simulated silicate- and calcium-based mineral OAE on diatom silicification. We found that increased silicate concentrations from silicate-based OAE increased diatom silicification. In contrast, the enhancement of alkalinity had no effect on community silicification and minimal effects on the silicification of different genera.
David González-Santana, María Segovia, Melchor González-Dávila, Librada Ramírez, Aridane G. González, Leonardo J. Pozzo-Pirotta, Veronica Arnone, Victor Vázquez, Ulf Riebesell, and J. Magdalena Santana-Casiano
Biogeosciences, 21, 2705–2715, https://doi.org/10.5194/bg-21-2705-2024, https://doi.org/10.5194/bg-21-2705-2024, 2024
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In a recent experiment off the coast of Gran Canaria (Spain), scientists explored a method called ocean alkalinization enhancement (OAE), where carbonate minerals were added to seawater. This process changed the levels of certain ions in the water, affecting its pH and buffering capacity. The researchers were particularly interested in how this could impact the levels of essential trace metals in the water.
Lucas Porz, Wenyan Zhang, Nils Christiansen, Jan Kossack, Ute Daewel, and Corinna Schrum
Biogeosciences, 21, 2547–2570, https://doi.org/10.5194/bg-21-2547-2024, https://doi.org/10.5194/bg-21-2547-2024, 2024
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Seafloor sediments store a large amount of carbon, helping to naturally regulate Earth's climate. If disturbed, some sediment particles can turn into CO2, but this effect is not well understood. Using computer simulations, we found that bottom-contacting fishing gears release about 1 million tons of CO2 per year in the North Sea, one of the most heavily fished regions globally. We show how protecting certain areas could reduce these emissions while also benefitting seafloor-living animals.
Jiaying A. Guo, Robert F. Strzepek, Kerrie M. Swadling, Ashley T. Townsend, and Lennart T. Bach
Biogeosciences, 21, 2335–2354, https://doi.org/10.5194/bg-21-2335-2024, https://doi.org/10.5194/bg-21-2335-2024, 2024
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Ocean alkalinity enhancement aims to increase atmospheric CO2 sequestration by adding alkaline materials to the ocean. We assessed the environmental effects of olivine and steel slag powder on coastal plankton. Overall, slag is more efficient than olivine in releasing total alkalinity and, thus, in its ability to sequester CO2. Slag also had less environmental effect on the enclosed plankton communities when considering its higher CO2 removal potential based on this 3-week experiment.
Giovanni Galli, Sarah Wakelin, James Harle, Jason Holt, and Yuri Artioli
Biogeosciences, 21, 2143–2158, https://doi.org/10.5194/bg-21-2143-2024, https://doi.org/10.5194/bg-21-2143-2024, 2024
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This work shows that, under a high-emission scenario, oxygen concentration in deep water of parts of the North Sea and Celtic Sea can become critically low (hypoxia) towards the end of this century. The extent and frequency of hypoxia depends on the intensity of climate change projected by different climate models. This is the result of a complex combination of factors like warming, increase in stratification, changes in the currents and changes in biological processes.
Sandy E. Tenorio and Laura Farías
Biogeosciences, 21, 2029–2050, https://doi.org/10.5194/bg-21-2029-2024, https://doi.org/10.5194/bg-21-2029-2024, 2024
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Time series studies show that CH4 is highly dynamic on the coastal ocean surface and planktonic communities are linked to CH4 accumulation, as found in coastal upwelling off Chile. We have identified the crucial role of picoplankton (> 3 µm) in CH4 recycling, especially with the addition of methylated substrates (trimethylamine and methylphosphonic acid) during upwelling and non-upwelling periods. These insights improve understanding of surface ocean CH4 recycling, aiding CH4 emission estimates.
Charlotte A. J. Williams, Tom Hull, Jan Kaiser, Claire Mahaffey, Naomi Greenwood, Matthew Toberman, and Matthew R. Palmer
Biogeosciences, 21, 1961–1971, https://doi.org/10.5194/bg-21-1961-2024, https://doi.org/10.5194/bg-21-1961-2024, 2024
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Oxygen (O2) is a key indicator of ocean health. The risk of O2 loss in the productive coastal/continental slope regions is increasing. Autonomous underwater vehicles equipped with O2 optodes provide lots of data but have problems resolving strong vertical O2 changes. Here we show how to overcome this and calculate how much O2 is supplied to the low-O2 bottom waters via mixing. Bursts in mixing supply nearly all of the O2 to bottom waters in autumn, stopping them reaching ecologically low levels.
Sabine Schmidt and Ibrahima Iris Diallo
Biogeosciences, 21, 1785–1800, https://doi.org/10.5194/bg-21-1785-2024, https://doi.org/10.5194/bg-21-1785-2024, 2024
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Along the French coast facing the Bay of Biscay, the large Gironde and Loire estuaries suffer from hypoxia. This prompted a study of the small Charente estuary located between them. This work reveals a minimum oxygen zone in the Charente estuary, which extends for about 25 km. Temperature is the main factor controlling the hypoxia. This calls for the monitoring of small turbid macrotidal estuaries that are vulnerable to hypoxia, a risk expected to increase with global warming.
Simone R. Alin, Jan A. Newton, Richard A. Feely, Samantha Siedlecki, and Dana Greeley
Biogeosciences, 21, 1639–1673, https://doi.org/10.5194/bg-21-1639-2024, https://doi.org/10.5194/bg-21-1639-2024, 2024
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We provide a new multi-stressor data product that allows us to characterize the seasonality of temperature, O2, and CO2 in the southern Salish Sea and delivers insights into the impacts of major marine heatwave and precipitation anomalies on regional ocean acidification and hypoxia. We also describe the present-day frequencies of temperature, O2, and ocean acidification conditions that cross thresholds of sensitive regional species that are economically or ecologically important.
Pamela Linford, Iván Pérez-Santos, Paulina Montero, Patricio A. Díaz, Claudia Aracena, Elías Pinilla, Facundo Barrera, Manuel Castillo, Aida Alvera-Azcárate, Mónica Alvarado, Gabriel Soto, Cécile Pujol, Camila Schwerter, Sara Arenas-Uribe, Pilar Navarro, Guido Mancilla-Gutiérrez, Robinson Altamirano, Javiera San Martín, and Camila Soto-Riquelme
Biogeosciences, 21, 1433–1459, https://doi.org/10.5194/bg-21-1433-2024, https://doi.org/10.5194/bg-21-1433-2024, 2024
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The Patagonian fjords comprise a world region where low-oxygen water and hypoxia conditions are observed. An in situ dataset was used to quantify the mechanism involved in the presence of these conditions in northern Patagonian fjords. Water mass analysis confirmed the contribution of Equatorial Subsurface Water in the advection of the low-oxygen water, and hypoxic conditions occurred when the community respiration rate exceeded the gross primary production.
Ting Wang, Buyun Du, Inke Forbrich, Jun Zhou, Joshua Polen, Elsie M. Sunderland, Prentiss H. Balcom, Celia Chen, and Daniel Obrist
Biogeosciences, 21, 1461–1476, https://doi.org/10.5194/bg-21-1461-2024, https://doi.org/10.5194/bg-21-1461-2024, 2024
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The strong seasonal increases of Hg in aboveground biomass during the growing season and the lack of changes observed after senescence in this salt marsh ecosystem suggest physiologically controlled Hg uptake pathways. The Hg sources found in marsh aboveground tissues originate from a mix of sources, unlike terrestrial ecosystems, where atmospheric GEM is the main source. Belowground plant tissues mostly take up Hg from soils. Overall, the salt marsh currently serves as a small net Hg sink.
Eleanor Simpson, Debby Ianson, Karen E. Kohfeld, Ana C. Franco, Paul A. Covert, Marty Davelaar, and Yves Perreault
Biogeosciences, 21, 1323–1353, https://doi.org/10.5194/bg-21-1323-2024, https://doi.org/10.5194/bg-21-1323-2024, 2024
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Shellfish aquaculture operates in nearshore areas where data on ocean acidification parameters are limited. We show daily and seasonal variability in pH and saturation states of calcium carbonate at nearshore aquaculture sites in British Columbia, Canada, and determine the contributing drivers of this variability. We find that nearshore locations have greater variability than open waters and that the uptake of carbon by phytoplankton is the major driver of pH and saturation state variability.
S. Alejandra Castillo Cieza, Rachel H. R. Stanley, Pierre Marrec, Diana N. Fontaine, E. Taylor Crockford, Dennis J. McGillicuddy Jr., Arshia Mehta, Susanne Menden-Deuer, Emily E. Peacock, Tatiana A. Rynearson, Zoe O. Sandwith, Weifeng Zhang, and Heidi M. Sosik
Biogeosciences, 21, 1235–1257, https://doi.org/10.5194/bg-21-1235-2024, https://doi.org/10.5194/bg-21-1235-2024, 2024
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The coastal ocean in the northeastern USA provides many services, including fisheries and habitats for threatened species. In summer 2019, a bloom occurred of a large unusual phytoplankton, the diatom Hemiaulus, with nitrogen-fixing symbionts. This led to vast changes in productivity and grazing rates in the ecosystem. This work shows that the emergence of one species can have profound effects on ecosystem function. Such changes may become more prevalent as the ocean warms due to climate change.
Claudine Hauri, Brita Irving, Sam Dupont, Rémi Pagés, Donna D. W. Hauser, and Seth L. Danielson
Biogeosciences, 21, 1135–1159, https://doi.org/10.5194/bg-21-1135-2024, https://doi.org/10.5194/bg-21-1135-2024, 2024
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Arctic marine ecosystems are highly susceptible to impacts of climate change and ocean acidification. We present pH and pCO2 time series (2016–2020) from the Chukchi Ecosystem Observatory and analyze the drivers of the current conditions to get a better understanding of how climate change and ocean acidification could affect the ecological niches of organisms.
William Hiles, Lucy C. Miller, Craig Smeaton, and William E. N. Austin
Biogeosciences, 21, 929–948, https://doi.org/10.5194/bg-21-929-2024, https://doi.org/10.5194/bg-21-929-2024, 2024
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Saltmarsh soils may help to limit the rate of climate change by storing carbon. To understand their impacts, they must be accurately mapped. We use drone data to estimate the size of three saltmarshes in NE Scotland. We find that drone imagery, combined with tidal data, can reliably inform our understanding of saltmarsh size. When compared with previous work using vegetation communities, we find that our most reliable new estimates of stored carbon are 15–20 % smaller than previously estimated.
De'Marcus Robinson, Anh L. D. Pham, David J. Yousavich, Felix Janssen, Frank Wenzhöfer, Eleanor C. Arrington, Kelsey M. Gosselin, Marco Sandoval-Belmar, Matthew Mar, David L. Valentine, Daniele Bianchi, and Tina Treude
Biogeosciences, 21, 773–788, https://doi.org/10.5194/bg-21-773-2024, https://doi.org/10.5194/bg-21-773-2024, 2024
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The present study suggests that high release of ferrous iron from the seafloor of the oxygen-deficient Santa Barabara Basin (California) supports surface primary productivity, creating positive feedback on seafloor iron release by enhancing low-oxygen conditions in the basin.
David J. Yousavich, De'Marcus Robinson, Xuefeng Peng, Sebastian J. E. Krause, Frank Wenzhöfer, Felix Janssen, Na Liu, Jonathan Tarn, Franklin Kinnaman, David L. Valentine, and Tina Treude
Biogeosciences, 21, 789–809, https://doi.org/10.5194/bg-21-789-2024, https://doi.org/10.5194/bg-21-789-2024, 2024
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Declining oxygen (O2) concentrations in coastal oceans can threaten people’s ways of life and food supplies. Here, we investigate how mats of bacteria that proliferate on the seafloor of the Santa Barbara Basin sustain and potentially worsen these O2 depletion events through their unique chemoautotrophic metabolism. Our study shows how changes in seafloor microbiology and geochemistry brought on by declining O2 concentrations can help these mats grow as well as how that growth affects the basin.
Miriam Tivig, David Peter Keller, and Andreas Oschlies
EGUsphere, https://doi.org/10.5194/egusphere-2024-258, https://doi.org/10.5194/egusphere-2024-258, 2024
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Marine biological production is highly dependent on the availability of nitrogen and phosphorus. Rivers are the main source of phosphorus to the oceans but poorly represented in global model oceans. We include dissolved nitrogen and phosphorus from river export in a global model ocean and find that the addition of riverine phosphorus affects marine biology on millennial timescales more than riverine nitrogen alone. Globally, riverine phosphorus input increase primary production rates.
Esdoorn Willcox, Marcos Lemes, Thomas Juul-Pedersen, Mikael Kristian Sejr, Johnna Michelle Holding, and Søren Rysgaard
EGUsphere, https://doi.org/10.5194/egusphere-2024-6, https://doi.org/10.5194/egusphere-2024-6, 2024
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For this work we measured the chemistry of seawater from bottles obtained from different depths, lon- and latitudes off the east coast of the Northeast Greenland national park to determine what is influencing concentrations of dissolved CO2. Historically, the region has always been thought to take up CO2 from the atmosphere but we show that it is possible for the region to become a source in late summer and discuss what variables may be related to such changes.
Krysten Rutherford, Katja Fennel, Lina Garcia Suarez, and Jasmin G. John
Biogeosciences, 21, 301–314, https://doi.org/10.5194/bg-21-301-2024, https://doi.org/10.5194/bg-21-301-2024, 2024
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We downscaled two mid-century (~2075) ocean model projections to a high-resolution regional ocean model of the northwest North Atlantic (NA) shelf. In one projection, the NA shelf break current practically disappears; in the other it remains almost unchanged. This leads to a wide range of possible future shelf properties. More accurate projections of coastal circulation features would narrow the range of possible outcomes of biogeochemical projections for shelf regions.
Lennart Thomas Bach
Biogeosciences, 21, 261–277, https://doi.org/10.5194/bg-21-261-2024, https://doi.org/10.5194/bg-21-261-2024, 2024
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Ocean alkalinity enhancement (OAE) is a widely considered marine carbon dioxide removal method. OAE aims to accelerate chemical rock weathering, which is a natural process that slowly sequesters atmospheric carbon dioxide. This study shows that the addition of anthropogenic alkalinity via OAE can reduce the natural release of alkalinity and, therefore, reduce the efficiency of OAE for climate mitigation. However, the additionality problem could be mitigated via a variety of activities.
Tsuneo Ono, Daisuke Muraoka, Masahiro Hayashi, Makiko Yorifuji, Akihiro Dazai, Shigeyuki Omoto, Takehiro Tanaka, Tomohiro Okamura, Goh Onitsuka, Kenji Sudo, Masahiko Fujii, Ryuji Hamanoue, and Masahide Wakita
Biogeosciences, 21, 177–199, https://doi.org/10.5194/bg-21-177-2024, https://doi.org/10.5194/bg-21-177-2024, 2024
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We carried out parallel year-round observations of pH and related parameters in five stations around the Japan coast. It was found that short-term acidified situations with Omega_ar less than 1.5 occurred at four of five stations. Most of such short-term acidified events were related to the short-term low salinity event, and the extent of short-term pH drawdown at high freshwater input was positively correlated with the nutrient concentration of the main rivers that flow into the coastal area.
K. Mareike Paul, Martijn Hermans, Sami A. Jokinen, Inda Brinkmann, Helena L. Filipsson, and Tom Jilbert
Biogeosciences, 20, 5003–5028, https://doi.org/10.5194/bg-20-5003-2023, https://doi.org/10.5194/bg-20-5003-2023, 2023
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Seawater naturally contains trace metals such as Mo and U, which accumulate under low oxygen conditions on the seafloor. Previous studies have used sediment Mo and U contents as an archive of changing oxygen concentrations in coastal waters. Here we show that in fjords the use of Mo and U for this purpose may be impaired by additional processes. Our findings have implications for the reliable use of Mo and U to reconstruct oxygen changes in fjords.
Hannah Sharpe, Michel Gosselin, Catherine Lalande, Alexandre Normandeau, Jean-Carlos Montero-Serrano, Khouloud Baccara, Daniel Bourgault, Owen Sherwood, and Audrey Limoges
Biogeosciences, 20, 4981–5001, https://doi.org/10.5194/bg-20-4981-2023, https://doi.org/10.5194/bg-20-4981-2023, 2023
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We studied the impact of submarine canyon processes within the Pointe-des-Monts system on biogenic matter export and phytoplankton assemblages. Using data from three oceanographic moorings, we show that the canyon experienced two low-amplitude sediment remobilization events in 2020–2021 that led to enhanced particle fluxes in the deep-water column layer > 2.6 km offshore. Sinking phytoplankton fluxes were lower near the canyon compared to background values from the lower St. Lawrence Estuary.
Dewi Langlet, Florian Mermillod-Blondin, Noémie Deldicq, Arthur Bauville, Gwendoline Duong, Lara Konecny, Mylène Hugoni, Lionel Denis, and Vincent M. P. Bouchet
Biogeosciences, 20, 4875–4891, https://doi.org/10.5194/bg-20-4875-2023, https://doi.org/10.5194/bg-20-4875-2023, 2023
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Benthic foraminifera are single-cell marine organisms which can move in the sediment column. They were previously reported to horizontally and vertically transport sediment particles, yet the impact of their motion on the dissolved fluxes remains unknown. Using microprofiling, we show here that foraminiferal burrow formation increases the oxygen penetration depth in the sediment, leading to a change in the structure of the prokaryotic community.
Masahiko Fujii, Ryuji Hamanoue, Lawrence Patrick Cases Bernardo, Tsuneo Ono, Akihiro Dazai, Shigeyuki Oomoto, Masahide Wakita, and Takehiro Tanaka
Biogeosciences, 20, 4527–4549, https://doi.org/10.5194/bg-20-4527-2023, https://doi.org/10.5194/bg-20-4527-2023, 2023
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This is the first study of the current and future impacts of climate change on Pacific oyster farming in Japan. Future coastal warming and acidification may affect oyster larvae as a result of longer exposure to lower-pH waters. A prolonged spawning period may harm oyster processing by shortening the shipping period and reducing oyster quality. To minimize impacts on Pacific oyster farming, in addition to mitigation measures, local adaptation measures may be required.
Taketoshi Kodama, Atsushi Nishimoto, Ken-ichi Nakamura, Misato Nakae, Naoki Iguchi, Yosuke Igeta, and Yoichi Kogure
Biogeosciences, 20, 3667–3682, https://doi.org/10.5194/bg-20-3667-2023, https://doi.org/10.5194/bg-20-3667-2023, 2023
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Carbon and nitrogen are essential elements for organisms; their stable isotope ratios (13C : 12C, 15N : 14N) are useful tools for understanding turnover and movement in the ocean. In the Sea of Japan, the environment is rapidly being altered by human activities. The 13C : 12C of small organic particles is increased by active carbon fixation, and phytoplankton growth increases the values. The 15N : 14N variations suggest that nitrates from many sources contribute to organic production.
Aubin Thibault de Chanvalon, George W. Luther, Emily R. Estes, Jennifer Necker, Bradley M. Tebo, Jianzhong Su, and Wei-Jun Cai
Biogeosciences, 20, 3053–3071, https://doi.org/10.5194/bg-20-3053-2023, https://doi.org/10.5194/bg-20-3053-2023, 2023
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The intensity of the oceanic trap of CO2 released by anthropogenic activities depends on the alkalinity brought by continental weathering. Between ocean and continent, coastal water and estuaries can limit or favour the alkalinity transfer. This study investigate new interactions between dissolved metals and alkalinity in the oxygen-depleted zone of estuaries.
Joonas J. Virtasalo, Peter Österholm, and Eero Asmala
Biogeosciences, 20, 2883–2901, https://doi.org/10.5194/bg-20-2883-2023, https://doi.org/10.5194/bg-20-2883-2023, 2023
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We mixed acidic metal-rich river water from acid sulfate soils and seawater in the laboratory to study the flocculation of dissolved metals and organic matter in estuaries. Al and Fe flocculated already at a salinity of 0–2 to large organic flocs (>80 µm size). Precipitation of Al and Fe hydroxide flocculi (median size 11 µm) began when pH exceeded ca. 5.5. Mn transferred weakly to Mn hydroxides and Co to the flocs. Up to 50 % of Cu was associated with the flocs, irrespective of seawater mixing.
Moritz Baumann, Allanah Joy Paul, Jan Taucher, Lennart Thomas Bach, Silvan Goldenberg, Paul Stange, Fabrizio Minutolo, and Ulf Riebesell
Biogeosciences, 20, 2595–2612, https://doi.org/10.5194/bg-20-2595-2023, https://doi.org/10.5194/bg-20-2595-2023, 2023
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The sinking velocity of marine particles affects how much atmospheric CO2 is stored inside our oceans. We measured particle sinking velocities in the Peruvian upwelling system and assessed their physical and biochemical drivers. We found that sinking velocity was mainly influenced by particle size and porosity, while ballasting minerals played only a minor role. Our findings help us to better understand the particle sinking dynamics in this highly productive marine system.
Kyle E. Hinson, Marjorie A. M. Friedrichs, Raymond G. Najjar, Maria Herrmann, Zihao Bian, Gopal Bhatt, Pierre St-Laurent, Hanqin Tian, and Gary Shenk
Biogeosciences, 20, 1937–1961, https://doi.org/10.5194/bg-20-1937-2023, https://doi.org/10.5194/bg-20-1937-2023, 2023
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Climate impacts are essential for environmental managers to consider when implementing nutrient reduction plans designed to reduce hypoxia. This work highlights relative sources of uncertainty in modeling regional climate impacts on the Chesapeake Bay watershed and consequent declines in bay oxygen levels. The results demonstrate that planned water quality improvement goals are capable of reducing hypoxia levels by half, offsetting climate-driven impacts on terrestrial runoff.
Linquan Mu, Jaime B. Palter, and Hongjie Wang
Biogeosciences, 20, 1963–1977, https://doi.org/10.5194/bg-20-1963-2023, https://doi.org/10.5194/bg-20-1963-2023, 2023
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Enhancing ocean alkalinity accelerates carbon dioxide removal from the atmosphere. We hypothetically added alkalinity to the Amazon River and examined the increment of the carbon uptake by the Amazon plume. We also investigated the minimum alkalinity addition in which this perturbation at the river mouth could be detected above the natural variability.
Karl M. Attard, Anna Lyssenko, and Iván F. Rodil
Biogeosciences, 20, 1713–1724, https://doi.org/10.5194/bg-20-1713-2023, https://doi.org/10.5194/bg-20-1713-2023, 2023
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Aquatic plants produce a large amount of organic matter through photosynthesis that, following erosion, is deposited on the seafloor. In this study, we show that plant detritus can trigger low-oxygen conditions (hypoxia) in shallow coastal waters, making conditions challenging for most marine animals. We propose that the occurrence of hypoxia may be underestimated because measurements typically do not consider the region closest to the seafloor, where detritus accumulates.
M. James McLaughlin, Cindy Bessey, Gary A. Kendrick, John Keesing, and Ylva S. Olsen
Biogeosciences, 20, 1011–1026, https://doi.org/10.5194/bg-20-1011-2023, https://doi.org/10.5194/bg-20-1011-2023, 2023
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Coral reefs face increasing pressures from environmental change at present. The coral reef framework is produced by corals and calcifying algae. The Kimberley region of Western Australia has escaped land-based anthropogenic impacts. Specimens of the dominant coral and algae were collected from Browse Island's reef platform and incubated in mesocosms to measure calcification and production patterns of oxygen. This study provides important data on reef building and climate-driven effects.
Patricia Ayón Dejo, Elda Luz Pinedo Arteaga, Anna Schukat, Jan Taucher, Rainer Kiko, Helena Hauss, Sabrina Dorschner, Wilhelm Hagen, Mariona Segura-Noguera, and Silke Lischka
Biogeosciences, 20, 945–969, https://doi.org/10.5194/bg-20-945-2023, https://doi.org/10.5194/bg-20-945-2023, 2023
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Ocean upwelling regions are highly productive. With ocean warming, severe changes in upwelling frequency and/or intensity and expansion of accompanying oxygen minimum zones are projected. In a field experiment off Peru, we investigated how different upwelling intensities affect the pelagic food web and found failed reproduction of dominant zooplankton. The changes projected could severely impact the reproductive success of zooplankton communities and the pelagic food web in upwelling regions.
Mathilde Jutras, Alfonso Mucci, Gwenaëlle Chaillou, William A. Nesbitt, and Douglas W. R. Wallace
Biogeosciences, 20, 839–849, https://doi.org/10.5194/bg-20-839-2023, https://doi.org/10.5194/bg-20-839-2023, 2023
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The deep waters of the lower St Lawrence Estuary and gulf have, in the last decades, experienced a strong decline in their oxygen concentration. Below 65 µmol L-1, the waters are said to be hypoxic, with dire consequences for marine life. We show that the extent of the hypoxic zone shows a seven-fold increase in the last 20 years, reaching 9400 km2 in 2021. After a stable period at ~ 65 µmol L⁻¹ from 1984 to 2019, the oxygen level also suddenly decreased to ~ 35 µmol L-1 in 2020.
Sachi Umezawa, Manami Tozawa, Yuichi Nosaka, Daiki Nomura, Hiroji Onishi, Hiroto Abe, Tetsuya Takatsu, and Atsushi Ooki
Biogeosciences, 20, 421–438, https://doi.org/10.5194/bg-20-421-2023, https://doi.org/10.5194/bg-20-421-2023, 2023
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We conducted repetitive observations in Funka Bay, Japan, during the spring bloom 2019. We found nutrient concentration decreases in the dark subsurface layer during the bloom. Incubation experiments confirmed that diatoms could consume nutrients at a substantial rate, even in darkness. We concluded that the nutrient reduction was mainly caused by nutrient consumption by diatoms in the dark.
Dirk Jong, Lisa Bröder, Tommaso Tesi, Kirsi H. Keskitalo, Nikita Zimov, Anna Davydova, Philip Pika, Negar Haghipour, Timothy I. Eglinton, and Jorien E. Vonk
Biogeosciences, 20, 271–294, https://doi.org/10.5194/bg-20-271-2023, https://doi.org/10.5194/bg-20-271-2023, 2023
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With this study, we want to highlight the importance of studying both land and ocean together, and water and sediment together, as these systems function as a continuum, and determine how organic carbon derived from permafrost is broken down and its effect on global warming. Although on the one hand it appears that organic carbon is removed from sediments along the pathway of transport from river to ocean, it also appears to remain relatively ‘fresh’, despite this removal and its very old age.
Georgia Filippi, Manos Dassenakis, Vasiliki Paraskevopoulou, and Konstantinos Lazogiannis
Biogeosciences, 20, 163–189, https://doi.org/10.5194/bg-20-163-2023, https://doi.org/10.5194/bg-20-163-2023, 2023
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The pollution of the western Saronikos Gulf from heavy metals has been examined through the study of marine sediment cores. It is a deep gulf (maximum depth 440 m) near Athens affected by industrial and volcanic activity. Eight cores were received from various stations and depths and analysed for their heavy metal content and geochemical characteristics. The results were evaluated by using statistical methods, environmental indicators and comparisons with old data.
Jing He and Michael D. Tyka
Biogeosciences, 20, 27–43, https://doi.org/10.5194/bg-20-27-2023, https://doi.org/10.5194/bg-20-27-2023, 2023
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Recently, ocean alkalinity enhancement (OAE) has gained interest as a scalable way to address the urgent need for negative CO2 emissions. In this paper we examine the capacity of different coastlines to tolerate alkalinity enhancement and the time scale of CO2 uptake following the addition of a given quantity of alkalinity. The results suggest that OAE has significant potential and identify specific favorable and unfavorable coastlines for its deployment.
Arnaud Laurent, Haiyan Zhang, and Katja Fennel
Biogeosciences, 19, 5893–5910, https://doi.org/10.5194/bg-19-5893-2022, https://doi.org/10.5194/bg-19-5893-2022, 2022
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The Changjiang is the main terrestrial source of nutrients to the East China Sea (ECS). Nutrient delivery to the ECS has been increasing since the 1960s, resulting in low oxygen (hypoxia) during phytoplankton decomposition in summer. River phosphorus (P) has increased less than nitrogen, and therefore, despite the large nutrient delivery, phytoplankton growth can be limited by the lack of P. Here, we investigate this link between P limitation, phytoplankton production/decomposition, and hypoxia.
Coline Poppeschi, Guillaume Charria, Anne Daniel, Romaric Verney, Peggy Rimmelin-Maury, Michaël Retho, Eric Goberville, Emilie Grossteffan, and Martin Plus
Biogeosciences, 19, 5667–5687, https://doi.org/10.5194/bg-19-5667-2022, https://doi.org/10.5194/bg-19-5667-2022, 2022
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This paper aims to understand interannual changes in the initiation of the phytoplankton growing period (IPGP) in the current context of global climate changes over the last 20 years. An important variability in the timing of the IPGP is observed with a trend towards a later IPGP during this last decade. The role and the impact of extreme events (cold spells, floods, and wind burst) on the IPGP is also detailed.
Lin Yang, Jing Zhang, Anja Engel, and Gui-Peng Yang
Biogeosciences, 19, 5251–5268, https://doi.org/10.5194/bg-19-5251-2022, https://doi.org/10.5194/bg-19-5251-2022, 2022
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Enrichment factors of dissolved organic matter (DOM) in the eastern marginal seas of China exhibited a significant spatio-temporal variation. Photochemical and enrichment processes co-regulated DOM enrichment in the sea-surface microlayer (SML). Autochthonous DOM was more frequently enriched in the SML than terrestrial DOM. DOM in the sub-surface water exhibited higher aromaticity than that in the SML.
Mona Norbisrath, Johannes Pätsch, Kirstin Dähnke, Tina Sanders, Gesa Schulz, Justus E. E. van Beusekom, and Helmuth Thomas
Biogeosciences, 19, 5151–5165, https://doi.org/10.5194/bg-19-5151-2022, https://doi.org/10.5194/bg-19-5151-2022, 2022
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Total alkalinity (TA) regulates the oceanic storage capacity of atmospheric CO2. TA is also metabolically generated in estuaries and influences coastal carbon storage through its inflows. We used water samples and identified the Hamburg port area as the one with highest TA generation. Of the overall riverine TA load, 14 % is generated within the estuary. Using a biogeochemical model, we estimated potential effects on the coastal carbon storage under possible anthropogenic and climate changes.
Cited articles
Adkins, J. F., Naviaux, J. D., Subhas, A. V., Dong, S., and Berelson, W. M.:
The Dissolution Rate of CaCO3 in the Ocean, Ann. Rev. Mar. Sci., 13, 57–80,
https://doi.org/10.1146/annurev-marine-041720-092514, 2021.
Aké-Castillo, J. A. and Vázquez, G.: Phytoplankton variation and its
relation to nutrients and allochthonous organic matter in a coastal lagoon
on the Gulf of Mexico, Estuar. Coast. Shelf Sci., 78, 705–714,
https://doi.org/10.1016/j.ecss.2008.02.012, 2008.
Anav, A., Friedlingstein, P., Kidston, M., Bopp, L., Ciais, P., Cox, P.,
Jones, C., Jung, M., Myneni, R., and Zhu, Z.: Evaluating the land and ocean
components of the global carbon cycle in the CMIP5 earth system models, J.
Clim., 26, 6801–6843, https://doi.org/10.1175/JCLI-D-12-00417.1, 2013.
Arora, V. K. and Boer, G. J.: Effects of simulated climate change on the
hydrology of major river basins, J. Geophys. Res.-Atmos., 106, 3335–3348,
https://doi.org/10.1029/2000JD900620, 2001.
Babaousmail, H., Hou, R., Ayugi, B., Ojara, M., Ngoma, H., Karim, R.,
Rajasekar, A., and Ongoma, V.: Evaluation of the Performance of CMIP6 Models
in Reproducing Rainfall Patterns over North Africa, Atmosphere, 12, 475,
https://doi.org/10.3390/atmos12040475, 2021.
Bakker, D. C. E., Pfeil, B., Smith, K., Harasawa, S., Landa, C. S., Nakaoka,
S., Nojiri, Y., Metzl, N., O'Brien, K. M., Olsen, A., Schuster, U.,
Tilbrook, B., Wanninkhof, R., Alin, S. R., Barbero, L., Bates, N., Bianchi,
A. A., Bonou, F., Boutin, J., Bozec, Y., Burger, E. F., Castle, R. D., Chen,
L., Chierici, M., Cosca, C. E., Currie, K. I., Evans, W., Featherstone, C.,
Feely, R. A., Fransson, A., Greenwood, N., Gregor, L., Hankin, S.,
Hardman-Mountford, N., Harlay, J., Hauck, J., Hoppema, M., Humphreys, M. P.,
Hunt, C. W., Johannessen, T., Jones, S. D., Keeling, R. F., Kitidis, V.,
Kozyr, A., Krasakopoulou, E., Kuwata, A., Lauvset, S. K., Lo Monaco, C.,
Manke, A. B., Mathis, J. T., Merlivat, L., Monteiro, P. M. S., Munro, D. R.,
Murata, A., Newberger, T., Omar, A. M., Ono, T., Paterson, K., Pierrot, D.,
Robbins, L. L., Sabine, C. L., Saito, S., Salisbury, J. E., Schneider, B.,
Schlitzer, R., Sieger, R., Skjelvan, I., Steinhoff, T., Sullivan, K. F.,
Sutherland, S. C., Sutton, A. J., Sweeney, C., Tadokoro, K., Takahashi, T.,
Telszewski, M., van Heuven, S. M. A. C., Vandemark, D., Wada, C., Ward, B.,
and Watson, A. J.: Partial pressure (or fugacity) of carbon dioxide,
salinity and other variables collected from Surface underway observations
using Carbon dioxide (CO2) gas analyzer and other instruments from unknown
platforms in the world-wide oceans from 1968-11-16 to 2014-12-31 (NCEI
Accession 0161129), NOAA Natl. Centers Environ. Information Dataset,
https://doi.org/10.3334/cdiac/otg.socat_v4_grid, 2017.
Barbero, L., Pierrot, D., Wanninkhof, R., Baringer, M. O., Byrne, R. H.,
Langdon, C., Zhang, J.-Z., and Stauffer, B. A.: Dissolved inorganic carbon,
total alkalinity, nutrients, and other variables collected from CTD profile,
discrete bottle, and surface underway observations using CTD, Niskin bottle,
flow-through pump, and other instruments from NOAA Ship Ronald H. Brown in
the Gulf of Mexico, Southeastern coast of the United States, and Mexican and
Cuban coasts during the third Gulf of Mexico and East Coast Carbon
(GOMECC-3) Cruise from 2017-07-18 to 2017-08-20 (NCEI Accession 0188978),
NOAA Natl. Centers Environ. Information Dataset,
https//doi.org/10.25921/yy5k-dw60, 2019.
Bentsen, M., Oliviè, D. J. L., Seland, Ø., Toniazzo, T., Gjermundsen,
A., Graff, L. S., Debernard, J. B., Gupta, A. K., He, Y., Kirkevåg, A.,
Schwinger, J., Tjiputra, J., Aas, K. S., Bethke, I., Fan, Y., Griesfeller,
J., Grini, A., Guo, C., Ilicak, M., Karset, I. H. H., Landgren, O. A.,
Liakka, J., Moseid, K. O., Nummelin, A., Spensberger, C., Tang, H., Zhang,
Z., Heinze, C., Iversen, T., and Schulz, M.: NCC NorESM2-MM model output
prepared for CMIP6 CMIP historical, Version 20191108, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.8040, 2019.
Bethke, I., Wang, Y., Counillon, F., Kimmritz, M., Fransner, F., Samuelsen,
A., Langehaug, H. R., Chiu, P.-G., Bentsen, M., Guo, C., Tjiputra, J.,
Kirkevåg, A., Oliviè, D. J. L., Seland, Ø., Fan, Y., Lawrence,
P., Eldevik, T., and Keenlyside, N.: NCC NorCPM1 model output prepared for
CMIP6 CMIP historical. Version 20200724, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.10894, 2019.
Booij, N., Ris, R. C., and Holthuijsen, L. H.: A third-generation wave model
for coastal regions: 1. Model description and validation, J. Geophys. Res.-Ocean., 104, 7649–7666, https://doi.org/10.1029/98JC02622, 1999.
Boscolo-Galazzo, Flavia, K. A., Crichton, A. R., Mawbey, E. M., Wade, B. S.,
and Pearson, P. N.: Temperature controls carbon cycling and biological
evolution in the ocean twilight zone, Science, 371, 1148–1152,
https://doi.org/10.1126/science.abb6643, 2021.
Boucher, O., Denvil, S., Levavasseur, G., Cozic, A., Caubel, A., Foujols,
M.-A., Meurdesoif, Y., Cadule, P., Devilliers, M., Ghattas, J., Lebas, N.,
Lurton, T., Mellul, L., Musat, I., and Migno, F.: IPSL IPSL-CM6A-LR model
output prepared for CMIP6 CMIP historical. Version 20180803, Earth Syst.
Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.5195, 2018.
Boucher, O., Denvil, S., Levavasseur, G., Cozic, A., Caubel, A., Foujols,
M.-A., Meurdesoif, Y., Balkanski, Y., Checa-Garcia, R., Hauglustaine, D.,
Bekki, S., and Marchand, M.: IPSL IPSL-CM6A-LR-INCA model output prepared
for CMIP6 CMIP historical. Version 20210216, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.13601, 2021.
Boyd, P. W., Claustre, H., Levy, M., Siegel, D. A., and Weber, T.:
Multi-faceted particle pumps drive carbon sequestration in the ocean,
Nature, 568, 327–335, https://doi.org/10.1038/s41586-019-1098-2, 2019.
Boyer, T. P., García, H. E., Locarnini, R. A., Zweng, M. M., Mishonov,
A. V., Reagan, J. R., Weathers, K. A. Baranova, O. K., Paver, C. R., Seidov,
D., and Smolyar, I. V.: World Ocean Atlas 2018, [woa18_all_ o16_01.nc], Natl. Centers Environ.
Information Dataset, https://www.ncei.noaa.gov/archive/accession/NCEI-W (last access: 15 January 2022), 2018.
Broullón, D., Pérez, F. F., Velo, A., Hoppema, M., Olsen, A.,
Takahashi, T., Key, R. M., Tanhua, T., González-Dávila, M.,
Jeansson, E., Kozyr, A., and van Heuven, S. M. A. C.: A global monthly
climatology of total alkalinity: a neural network approach, Earth Syst. Sci.
Data, 11, 1109–1127, https://doi.org/10.5194/essd-11-1109-2019, 2019.
Broullón, D., Pérez, F. F., Velo, A., Hoppema, M., Olsen, A.,
Takahashi, T., Key, R. M., Tanhua, T., Santana-Casiano, J. M., and Kozyr,
A.: A global monthly climatology of oceanic total dissolved inorganic carbon
(DIC): a neural network approach (NCEI Accession 0222469), NOAA Natl.
Centers Environ. Inf., https://doi.org/10.25921/ndgj-jp24, 2020a.
Broullón, D., Pérez, F. F., Velo, A., Hoppema, M., Olsen, A.,
Takahashi, T., Key, R. M., Tanhua, T., González-Dávila, M.,
Jeansson, E., Kozyr, A., and van Heuven, S. M. A. C.: A global monthly
climatology of total alkalinity (AT): a neural network approach (NCEI
Accession 0222470), NOAA Natl. Centers Environ. Inf.,
https://doi.org/10.25921/5p69-y471, 2020b.
Buchan, J., Hirschi, J. J.-M., Blaker, A. T., and Sinha, B.: North Atlantic
SST anomalies and the cold North European weather events of winter 2009/10
and December 2010, Mon. Weather Rev., 142, 922–932,
https://doi.org/10.1175/MWR-D-13-00104.1, 2014.
Buesseler, K. O., Boyd, P. W., Black, E. E., and Siegel, D. A.: Metrics that
matter for assessing the ocean biological carbon pump, P. Natl. Acad.
Sci. USA, 117, 9679–9687, https://doi.org/10.1073/pnas.1918114117, 2020.
Burton, E. A. and Walter, L. M.: Relative precipitation rates of aragonite
and Mg calcite from seawater: Temperature or carbonate ion control?,
Geology, 15, 111–114, https://doi.org/10.1130/0091-7613(1987)15<111:RPROAA>2.0.CO;2, 1987.
Bushinsky, S. M., Landschützer, P., Rödenbeck, C., Gray, A. R.,
Baker, D., Mazloff, M. R., Resplandy, L., Johnson, K. S., and Sarmiento, J.
L.: Reassessing Southern Ocean Air-Sea CO2 Flux Estimates With the Addition
of Biogeochemical Float Observations, Global Biogeochem. Cy., 33,
1370–1388, https://doi.org/10.1029/2019GB006176, 2019.
Cai, W. J., Hu, X., Huang, W. J., Murrell, M. C., Lehrter, J. C., Lohrenz,
S. E., Chou, W. C., Zhai, W., Hollibaugh, J. T., Wang, Y., Zhao, P., Guo,
X., Gundersen, K., Dai, M., and Gong, G. C.: Acidification of subsurface
coastal waters enhanced by eutrophication, Nat. Geosci., 4, 766–770,
https://doi.org/10.1038/ngeo1297, 2011.
Cervantes-Díaz, G. Y., Hernández-Ayón, J. M., Zirino, A.,
Herzka, S. Z., Camacho-Ibar, V., Norzagaray, O., Barbero, L., Montes, I.,
Sudre, J., and Delgado, J. A.: Understanding upper water mass dynamics in
the Gulf of Mexico by linking physical and biogeochemical features, J. Mar.
Syst., 225, 103647, https://doi.org/10.1016/j.jmarsys.2021.103647, 2022.
Chakraborty, S. and Lohrenz, S. E.: Phytoplankton community structure in the
river-influenced continental margin of the northern Gulf of Mexico, Mar.
Ecol. Prog. Ser., 521, 31–47, https://doi.org/10.3354/meps11107, 2015.
Chassignet, E. P., Smith, L. T., Halliwell, G. R., and Bleck, R.: North
Atlantic simulations with the Hybrid Coordinate Ocean Model (HYCOM): impact
of the vertical coordinate choice, reference pressure, and thermobaricity,
J. Phys. Oceanogr., 33, 2504–2526,
https://doi.org/10.1175/1520-0485(2003)033<2504:NASWTH>2.0.CO;2, 2003.
Chassignet, E. P., Hurlburt, H. E., Smedstad, O. M., Halliwell, G. R.,
Hogan, P. J., Wallcraft, A. J., Baraille, R., and Bleck, R.: The HYCOM
(HYbrid Coordinate Ocean Model) data assimilative system, J. Mar. Syst., 65,
60–83, https://doi.org/10.1016/j.jmarsys.2005.09.016, 2007.
Chen, S., Hu, C., Barnes, B. B., Wanninkhof, R., Cai, W. J., Barbero, L.,
and Pierrot, D.: A machine learning approach to estimate surface ocean pCO2
from satellite measurements, Remote Sens. Environ., 228, 203–226,
https://doi.org/10.1016/j.rse.2019.04.019, 2019.
Chen, X., Lohrenz, S. E., and Wiesenburg, D. A.: Distribution and
controlling mechanisms of primary production on the Louisiana–Texas
continental shelf, J. Mar. Syst., 25, 179–207,
https://doi.org/10.1016/S0924-7963(00)00014-2, 2000.
Coble, P. G., Robbins, L. L., Daly, K. L., Cai, W.-J., Fennel, K., and Lorenz, S. E., A Preliminary Carbon Budget for the Gulf of Mexico, Marine Science Faculty Publications, Ocean Carbon and Biogeochemistry Newsletter, volume. 3, 1–4, 820,
https://digitalcommons.usf.edu/msc_facpub/820 (last access: 5 November 2021), 2010.
Czerny, J., Schulz, K. G., Ludwig, A., and Riebesell, U.: Technical Note: A simple method for air–sea gas exchange measurements in mesocosms and its application in carbon budgeting, Biogeosciences, 10, 1379–1390, https://doi.org/10.5194/bg-10-1379-2013, 2013.
Dai, A., Rasmussen, R. M., Liu, C., Ikeda, K., and Prein, A. F.: A new
mechanism for warm-season precipitation response to global warming based on
convection-permitting simulations, Clim. Dynam., 55, 343–368,
https://doi.org/10.1007/s00382-017-3787-6, 2020.
Danabasoglu, G.: NCAR CESM2-FV2 model output prepared for CMIP6 CMIP
historical. Version 20191120, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.11297, 2019a.
Danabasoglu, G.: NCAR CESM2-WACCM-FV2 model output prepared for CMIP6 CMIP
historical. Version 20191120, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.11298, 2019b.
Danabasoglu, G.: NCAR CESM2-WACCM model output prepared for CMIP6 CMIP
historical, Version 20190917, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.10071, 2019c.
Danabasoglu, G.: NCAR CESM2 model output prepared for CMIP6 CMIP historical,
Version 20191105, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.7627, 2019d.
Davis, C. E., Blackbird, S., Wolff, G., Woodward, M., and Mahaffey, C.:
Seasonal organic matter dynamics in a temperate shelf sea, Prog. Oceanogr.,
177, 101925, https://doi.org/10.1016/j.pocean.2018.02.021, 2019.
Delgado, J. A., Sudre, J., Tanahara, S., Montes, I., Hernández-Ayón, J. M., and Zirino, A.: Effect of Caribbean Water incursion into the Gulf of Mexico derived from absolute dynamic topography, satellite data, and remotely sensed chlorophyll a, Ocean Sci., 15, 1561–1578, https://doi.org/10.5194/os-15-1561-2019, 2019.
Dickson, A. G.: An exact definition of total alkalinity and a procedure for
the estimation of alkalinity and total inorganic carbon from titration data,
Deep-Sea Res. Pt. A, 28, 609–623,
https://doi.org/10.1016/0198-0149(81)90121-7, 1981.
Dickson, A. G., Sabine, C. L., and Christian, J. R. (Eds): Guide to best practices for ocean CO2 measurement, Sidney, British Columbia, North Pacific Marine Science Organization, 191 pp, PICES Special Publication 3; IOCCP Report 8 https://doi.org/https://doi.org/10.25607/OBP-1342, 2007.
Dils, B., Buchwitz, M., Reuter, M., Schneising, O., Boesch, H., Parker, R.,
and Wunch, D.: The Greenhouse Gas Climate Change Initiative (GHG-CCI):
comparative validation of GHG-CCI SCIAMACHY/ENVISAT and TANSO-FTS/GOSAT CO2
and CH4 retrieval algorithm products with measurements from the TCCON,
Atmos. Meas. Tech., 7, 1723–1744, https://doi.org/10.5194/amt-7-1723-2014,
2014.
Doney, S. C., Fabry, V. J., Feely, R. A., and Kleypas, J. A.: Ocean
acidification: The other CO2 problem, Ann. Rev. Mar. Sci., 1, 169–192,
https://doi.org/10.1146/annurev.marine.010908.163834, 2009.
Dzwonkowski, B., Fournier, S., Reager, J. T., Milroy, S., Park, K., Shiller,
A. M., Greer, A. T., Soto, I., Dykstra, S. L., and Sanial., V.: Tracking sea
surface salinity and dissolved oxygen on a river-influenced, seasonally
stratified shelf, Mississippi Bight, northern Gulf of Mexico, Cont. Shelf
Res., 169, 25–33, https://doi.org/10.1016/j.csr.2018.09.009, 2018.
Eyring, V., Bony, S., Meehl, G. A., Senior, C. A., Stevens, B., Stouffer, R.
J., and Taylor, K. E.: Overview of the Coupled Model Intercomparison Project
Phase 6 (CMIP6) experimental design and organization, Geosci. Model Dev., 9,
1937–1958, https://doi.org/10.5194/gmd-9-1937-2016, 2016.
Farmer, J. R., Hertzberg, J. E., Cardinal, D., Fietz, S., Hendry, K.,
Jaccard, S. L., Paytan, A., and Al, E.: Assessment of C, N, and Si isotopes
as tracers of past ocean nutrient and carbon cycling, Global Biogeochem.
Cy., 35, e2020GB006775, https://doi.org/10.1029/2020GB006775, 2021.
Feely, R. A., Sabine, C. L., Lee, K., Millero, F. J., Lamb, M. F., Greeley, D., Bullister, J. L., Key, R. M., Peng, T.-H., Kozyr, A., Ono, T., and Wong, C. S.: In situ calcium carbonate dissolution in the
Pacific Ocean, Global Biogeochem. Cy., 16, 1144,
https://doi.org/10.1029/2002GB001866, 2002.
Feely, R. A., Doney, S. C., and Cooley, S. R.: Ocean acidification: Present
conditions and future changes in a high-CO2 world, Oceanography, 22, 36–47,
http://www.jstor.org/stable/24861022 (last access: 24 September 2021), 2009.
Fennel, K., Wilkin, J., Levin, J., Moisan, J., O'Reilly, J., and Haidvogel,
D.: Nitrogen cycling in the Middle Atlantic Bight: Results from a
three-dimensional model and implications for the North Atlantic nitrogen
budget, Global Biogeochem. Cy., 20, 1–14,
https://doi.org/10.1029/2005GB002456, 2006.
Fennel, K., Wilkin, J., Previdi, M., and Najjar, R.: Denitrification effects
on air-sea CO2 flux in the coastal ocean: Simulations for the northwest
North Atlantic, Geophys. Res. Lett., 35, 1–5,
https://doi.org/10.1029/2008GL036147, 2008.
Fennel, K., Hetland, R., Feng, Y., and DiMarco, S.: A coupled physical-biological model of the Northern Gulf of Mexico shelf: model description, validation and analysis of phytoplankton variability, Biogeosciences, 8, 1881–1899, https://doi.org/10.5194/bg-8-1881-2011, 2011.
Fennel, W.: Towards bridging biogeochemical and fish-production models, J.
Mar. Syst., 71, 171–194, https://doi.org/10.1016/j.jmarsys.2007.06.008,
2008.
Fischer, E. M. and Knutti, R.: Anthropogenic contribution to global
occurrence of heavy-precipitation and high-temperature extremes, Nat. Clim.
Change, 5, 560–564, https://doi.org/10.1038/nclimate2617, 2015.
Frei, C., Schär, C., Lüthi, D., and Davies, H. C.: Heavy
precipitation processes in a warmer climate, Geophys. Res. Lett., 25,
1431–1434, https://doi.org/10.1029/98GL51099, 1998.
García, H. E., Weathers, K. W., Paver, C. R., Smolyar, I., Boyer, T. P.,
Locarnini, M., Zweng, M. M., Mishonov, A. V, Baranova, O. K., and Seidov,
D.: World Ocean Atlas 2018, Volume 3: Dissolved Oxygen, Apparent Oxygen
Utilization, and Dissolved Oxygen Saturation, NOAA Atlas NESDIS 83, 38 pp.
https://archimer.ifremer.fr/doc/00651/76337/ (last access: 28 January 2021), 2019.
Gomez, F. A., Wanninkhof, R., Barbero, L., Lee, S.-K., and Hernandez Jr., F. J.: Seasonal patterns of surface inorganic carbon system variables in the Gulf of Mexico inferred from a regional high-resolution ocean biogeochemical model, Biogeosciences, 17, 1685–1700, https://doi.org/10.5194/bg-17-1685-2020, 2020.
Gomez, F. A., Wanninkhof, R., Barbero, L., and Lee, S.-K.: Surface
patterns of temperature, salinity, total alkalinity (TA), and dissolved
inorganic carbon (DIC) across the Gulf of Mexico derived from the GoMBio
model experiments from 1981-01-01 to 2014-12-31 (NCEI Accession 0242495),
subset used: hindcast.surface.fields.nc, NOAA Natl. Centers Environ.
Information Dataset,
https://doi.org/10.25921/c34h-gb83, 2021.
Gregor, L. and Gruber, N.: OceanSODA-ETHZ: A global gridded data set of the
surface ocean carbonate system for seasonal to decadal studies of ocean
acidification (v2021) (NCEI Accession 0220059), NOAA Natl. Centers Environ.
Information. Dataset, Version 2021, https://doi.org/10.25921/m5wx-ja34,
2020.
Große, F., Fennel, K., and Laurent, A.: Quantifying the relative importance
of riverine and open-ocean nitrogen sources for hypoxia formation in the
northern Gulf of Mexico, J. Geophys. Res.-Ocean., 124, 5451–5467,
https://doi.org/10.1029/2019JC015230, 2019.
Guo, H., John, J. G., Blanton, C., McHugh, C., Nikonov, S., Radhakrishnan,
A., Rand, K., Zadeh, N. T., Balaji, V., Durachta, J., Dupuis, C., Menzel,
R., Robinson, T., Underwood, S., Vahlenkamp, H., and Bu, R.: NOAA-GFDL
GFDL-CM4 model output historical, Version: 20180701, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.8594, 2018.
Gustafsson, E., Hagens, M., Sun, X., Reed, D. C., Humborg, C., Slomp, C. P., and Gustafsson, B. G.: Sedimentary alkalinity generation and long-term alkalinity development in the Baltic Sea, Biogeosciences, 16, 437–456, https://doi.org/10.5194/bg-16-437-2019, 2019.
Haidvogel, D. B., Arango, H., Budgell, W. P., Cornuelle, B. D., Curchitser,
E., Di Lorenzo, E., Fennel, K., Geyer, W. R., Hermann, A. J., Lanerolle, L.,
Levin, J., McWilliams, J. C., Miller, A. J., Moore, A. M., Powell, T. M.,
Shchepetkin, A. F., Sherwood, C. R., Signell, R. P., Warner, J. C., and
Wilkin, J.: Ocean forecasting in terrain-following coordinates: Formulation
and skill assessment of the Regional Ocean Modeling System, J. Comput.
Phys., 227, 3595–3624, https://doi.org/10.1016/j.jcp.2007.06.016, 2008.
Hofmann, E. E., Cahill, B., Fennel, K., Friedrichs, M. A. M., Hyde, K., Lee,
C., Mannino, A., Najjar, R. G., O'Reilly, J. E., Wilkin, J., and Xue, J.:
Modeling the dynamics of continental shelf carbon, Ann. Rev. Mar. Sci., 3,
93–122, https://doi.org/10.1146/annurev-marine-120709-142740, 2011.
Hu, X. and Cai, W. J.: An assessment of ocean margin anaerobic processes on
oceanic alkalinity budget, Global Biogeochem. Cy., 25, 1–11,
https://doi.org/10.1029/2010GB003859, 2011.
Huang, W. J., Cai, W. J., Wang, Y., Lohrenz, S. E., and Murrell, M. C.: The
carbon dioxide system on the Mississippi River-dominated continental shelf
in the northern Gulf of Mexico, J. Geophys. Res.-Ocean, 120, 1429–1445,
https://doi.org/10.1002/2014JC010498, 2015.
Inskeep, W. P. and Bloom, P. R.: An evaluation of rate equations for calcite
precipitation kinetics at pCO2 less than 0.01 atm and pH greater than 8,
Geochim. Cosmochim. Ac., 49, 2165–2180,
https://doi.org/10.1016/0016-7037(85)90074-2, 1985.
Jiang, Z. P., Cai, W. J., Chen, B., Wang, K., Han, C., Roberts, B. J.,
Hussain, N., and Li, Q.: Physical and Biogeochemical Controls on pH Dynamics
in the Northern Gulf of Mexico During Summer Hypoxia, J. Geophys. Res.-Ocean., 124, 5979–5998, https://doi.org/10.1029/2019JC015140, 2019.
Jones, C. D., Arora, V., Friedlingstein, P., Bopp, L., Brovkin, V., Dunne,
J., Graven, H., Hoffman, F., Ilyina, T., John, J. G., Jung, M., Kawamiya,
M., Koven, C., Pongratz, J., Raddatz, T., Randerson, J. T., and Zaehle, S.:
C4MIP-The Coupled Climate-Carbon Cycle Model Intercomparison Project:
Experimental protocol for CMIP6, Geosci. Model Dev., 9, 2853–2880,
https://doi.org/10.5194/gmd-9-2853-2016, 2016.
Jungclaus, J., Bittner, M., Wieners, K.-H., Wachsmann, F., Schupfner, M.,
Legutke, S., Giorgetta, M., Reick, C., Gayler, V., Haak, H., de Vrese, P.,
Raddatz, T., Esch, M., and Mauritsen, Thorst, E.: MPI-M MPI-ESM1.2-HR model
output prepared for CMIP6 CMIP historical, Version 20190710, Earth Syst.
Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.6594, 2019.
Jurado, E., Dachs, J., Duarte, C. M., and Simo, R.: Atmospheric deposition
of organic and black carbon to the global oceans, Atmos. Environ., 42,
7931–7939, https://doi.org/10.1016/j.atmosenv.2008.07.029, 2008.
Keppler, L., Landschützer, P., Gruber, N., Lauvset, S. K., and Stemmler,
I.: Mapped Observation-Based Oceanic Dissolved Inorganic Carbon (DIC),
monthly climatology from January to December (based on observations between
2004 and 2017), from the Max-Planck-Institute for Meteorology
(MOBO-DIC_MPIM) (NCEI Accession 0221526), NOAA Natl. Centers
Environ. Information Dataset, https://doi.org/10.25921/yvzj-zx46, 2020.
King, A. L., Jenkins, B. D., Wallace, J. R., Liu, Y., Wikfors, G. H., Milke,
L. M., and Meseck, S. L.: Effects of CO2 on growth rate, C : N : P, and fatty
acid composition of seven marine phytoplankton species, Mar. Ecol. Prog.
Ser., 537, 59–69, https://doi.org/10.3354/meps11458, 2015.
Kishi, M. J., Kashiwai, M., Ware, D. M., Megrey, B. A., Eslinger, D. L.,
Werner, F. E., Noguchi-Aita, M., Azumaya, T., Fujii, M., Hashimoto, S.,
Huang, D., Iizumi, H., Ishida, Y., Kang, S., Kantakov, G. A., Kim, H. cheol,
Komatsu, K., Navrotsky, V. V., Smith, S. L., Tadokoro, K., Tsuda, A.,
Yamamura, O., Yamanaka, Y., Yokouchi, K., Yoshie, N., Zhang, J., Zuenko, Y.
I., and Zvalinsky, V. I.: NEMURO-a lower trophic level model for the North
Pacific marine ecosystem, Ecol. Modell., 202, 12–25,
https://doi.org/10.1016/j.ecolmodel.2006.08.021, 2007.
Kishi, M. J., Ito, S. I., Megrey, B. A., Rose, K. A., and Werner, F. E.: A
review of the NEMURO and NEMURO, FISH models and their application to marine
ecosystem investigations, J. Oceanogr., 67, 3–16,
https://doi.org/10.1007/s10872-011-0009-4, 2011.
Krasting, J. P., John, J. G., Blanton, C., McHugh, C., Nikonov, S.,
Radhakrishnan, A., Rand, K., Zadeh, N. T., Balaji, V., Durachta, J., Dupuis,
C., Menzel, R., Robinson, T., Underwood, S., Vahlenkamp, H., Dunne, K. A.,
Gauthier, P. P., Ginoux, P., Griffies, S. M., Hallberg, R., Harrison, M.,
Hurlin, W., Malyshev, S., Naik, V., Paulot, F., Paynter, D. J., Ploshay, J.,
Reichl, B. G., Schwarzkopf, D. M., Seman, C. J., Silvers, L., Wyman, B.,
Zeng, Y., Adcroft, A., Dunne, J. P., Dussin, R., Guo, H., He, J., Held, I.
M., Horowitz, L. W., Lin, Pu; Milly, P. C., Shevliakova, E., Stock, C.,
Winton, M., Wittenberg, A. T., Xie, Y., and Zhao, M.: NOAA-GFDL GFDL-ESM4
model output prepared for CMIP6 CMIP historical, Version 20190726, Earth
Syst. Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.8597, 2018.
Landschützer, P., Gruber, N., and Bakker, D. C. E.: An observation-based
global monthly gridded sea surface pCO2 product from 1982 onward and its
monthly climatology (NCEI Accession 0160558), NOAA Natl. Centers Environ.
Information Dataset,
https://doi.org/10.7289/v5z899n6, 2017.
Landschützer, P., Gruber, N., Bakker, D. C. E., Stemmler, I., and Six,
K. D.: Strengthening seasonal marine CO2 variations due to increasing
atmospheric CO2, Nat. Clim. Change, 8, 146–150,
https://doi.org/10.1038/s41558-017-0057-x, 2018.
Landschützer, P., Laruelle, G. G., Roobaert, A., and Regnier, P.: A
combined global ocean pCO2 climatology combining open ocean and coastal
areas (NCEI Accession 0209633), NOAA Natl. Centers Environ. Information
Dataset, https://doi.org/10.25921/qb25-f418, 2020.
Laurent, A. and Fennel, K.: Time-Evolving, Spatially Explicit Forecasts of
the Northern Gulf of Mexico Hypoxic Zone, Environ. Sci. Technol., 53,
14449–14458, https://doi.org/10.1021/acs.est.9b05790, 2019.
Laurent, A., Fennel, K., Cai, W. J., Huang, W. J., Barbero, L., and
Wanninkhof, R.: Eutrophication-induced acidification of coastal waters in
the northern Gulf of Mexico: Insights into origin and processes from a
coupled physical-biogeochemical model, Geophys. Res. Lett., 44, 946–956,
https://doi.org/10.1002/2016GL071881, 2017.
Laurent, A., Fennel, K., Ko, D. S., and Lehrter, J.: Climate change
projected to exacerbate impacts of coastal eutrophication in the northern
Gulf of Mexico, J. Geophys. Res.-Ocean., 123, 3408–3426,
https://doi.org/10.1002/2017JC013583, 2018.
Laurent, A., Fennel, K., and Kuhn, A.: An observation-based evaluation and ranking of historical Earth system model simulations in the northwest North Atlantic Ocean, Biogeosciences, 18, 1803–1822, https://doi.org/10.5194/bg-18-1803-2021, 2021.
Lauvset, S. K., Carter, B. R., Perez, F. F., Jiang, L. Q., Feely, R. A.,
Velo, A., and Olsen, A.: Processes Driving Global Interior Ocean pH
Distribution, Global Biogeochem. Cy., 34, 1–17,
https://doi.org/10.1029/2019GB006229, 2020.
Le Moigne, F. A. C., Poulton, A. J., Henson, S. A., Daniels, C. J., Fragoso,
G. M., Mitchell, E., Richier, S., Russell, B. C., Smith, H. E. K., and
Tarling, G. A.: Carbon export efficiency and phytoplankton community
composition in the A tlantic sector of the Arctic Ocean, J. Geophys. Res.-Ocean, 120, 3896–3912, https://doi.org/10.1002/2015JC010700, 2015.
Lewis, E. and Wallace, D.: Program Developed for CO2 System Calculations
ORNL/CDIAC-105, Carbon Dioxide Information Analysis Centre,
https://doi.org/10.2172/639712, 1998.
Lindsay, K., Bonan, G. B., Doney, S. C., Hoffman, F. M., Lawrence, D. M.,
Long, M. C., Mahowald, N. M., Moore, J. K., Randerson, J. T., and Thornton,
P. E.: Preindustrial-control and twentieth-century carbon cycle experiments
with the Earth system model CESM1(BGC), J. Clim., 27, 8981–9005,
https://doi.org/10.1175/JCLI-D-12-00565.1, 2014.
Liszka, C.: Zooplankton-mediated carbon flux in the Southern Ocean:
influence of community structure, metabolism and behaviour, Ph.D. thesis, School of Environmental Sciences, University of East Anglia, England, 237 pp.,
https://ueaeprints.uea.ac.uk/id/eprint/69977 (last access: 15 September 2021, 2018.
Liu, Y., Lee, S. K., Muhling, B. A., Lamkin, J. T., and Enfield, D. B.:
Significant reduction of the Loop Current in the 21st century and its impact
on the Gulf of Mexico, J. Geophys. Res.-Ocean., 117, C05039,
https://doi.org/10.1029/2011JC007555, 2012.
Liu, Y., Lee, S. K., Enfield, D. B., Muhling, B. A., Lamkin, J. T.,
Muller-Karger, F. E., and Roffer, M. A.: Potential impact of climate change
on the Intra-Americas Sea: Part – 1. A dynamic downscaling of the CMIP5 model
projections, J. Mar. Syst., 148, 56–69,
https://doi.org/10.1016/j.jmarsys.2015.01.007, 2015.
Liu, M., Ren, H.-L., Zhang, R., Ineson, S., and Wang, R.: ENSO phase-locking behavior in climate models: from CMIP5 to CMIP6, Environ. Res. Commun., 3, 31004, https://doi.org/10.1088/2515-7620/abf295, 2021.
Lohrenz, S. E., Cai, W. J., Chakraborty, S., Huang, W. J., Guo, X., He, R.,
Xue, Z., Fennel, K., Howden, S., and Tian, H.: Satellite estimation of
coastal pCO2 and air-sea flux of carbon dioxide in the northern Gulf of
Mexico, Remote Sens. Environ., 207, 71–83,
https://doi.org/10.1016/j.rse.2017.12.039, 2018.
Lovato, T., Peano, D., and Butenschön, M.: CMCC CMCC-ESM2 model output
prepared for CMIP6 CMIP historical, Version 20210114, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.13195, 2021.
Mackenzie, F. T., Lerman, A., and Andersson, A. J.: Past and present of sediment and carbon biogeochemical cycling models, Biogeosciences, 1, 11–32, https://doi.org/10.5194/bg-1-11-2004, 2004.
Maher, D. T. and Eyre, B. D.: Carbon budgets for three autotrophic
Australian estuaries: Implications for global estimates of the coastal
air-water CO2 flux, Global Biogeochem. Cy., 26, GB1032,
https://doi.org/10.1029/2011GB004075, 2012.
Mari, X., Passow, U., Migon, C., Burd, A. B., and Legendre, L.: Transparent
exopolymer particles: Effects on carbon cycling in the ocean, Prog.
Oceanogr., 151, 13–37, https://doi.org/10.1016/j.pocean.2016.11.002, 2017.
Middelburg, J. J., Soetaert, K., and Hagens, M.: Ocean alkalinity, buffering
and biogeochemical processes, Rev. Geophys., 58, https://doi.org/10.1029/2019RG000681, e2019RG000681, 2020.
Millero, F. J.: The effect of pressure on the solubility of minerals in
water and seawater, Geochim. Cosmochim. Ac., 46, 11–22,
https://doi.org/10.1016/0016-7037(82)90286-1, 1982.
Millero, F. J.: Thermodynamics of the carbon dioxide system in the oceans,
Geochim. Cosmochim. Ac., 59, 661–677,
https://doi.org/10.1016/0016-7037(94)00354-O, 1995.
Millero, F. J.: The marine inorganic carbon cycle, Chem. Rev., 107,
308–341, https://doi.org/10.1021/cr0503557, 2007.
Millero, F. J.: Carbonate constants for estuarine waters, Mar. Freshw. Res.,
61, 139–142, https://doi.org/10.1071/MF09254, 2010.
Moore, J. K., Doney, S. C., and Lindsay, K.: Upper ocean ecosystem dynamics
and iron cycling in a global three-dimensional model, Global Biogeochem.
Cy., 18, GB4028, https://doi.org/10.1029/2004GB002220, 2004.
Mucci, A.: The Solubility of Calcite and Aragonite in Seawater at Various
Salinities, Temperatures and One Atmosphere Total Pressure, Am. J. Sci., 283, 780–799, https://doi.org/10.2475/ajs.283.7.780, 1983.
Na, Y., Fu, Q., and Kodama, C.: Precipitation probability and its future changes from a global cloud‐resolving model and CMIP6 simulations, J. Geophys. Res. Atmos., 125, e2019JD031926, https://doi.org/10.1029/2019JD031926, 2020.
Najjar, R. G., Herrmann, M., Alexander, R., Boyer, E. W., Burdige, D. J.,
Butman, D., Cai, W. J., Canuel, E. A., Chen, R. F., Friedrichs, M. A. M.,
Feagin, R. A., Griffith, P. C., Hinson, A. L., Holmquist, J. R., Hu, X.,
Kemp, W. M., Kroeger, K. D., Mannino, A., McCallister, S. L., McGillis, W.
R., Mulholland, M. R., Pilskaln, C. H., Salisbury, J., Signorini, S. R.,
St-Laurent, P., Tian, H., Tzortziou, M., Vlahos, P., Wang, Z. A., and
Zimmerman, R. C.: Carbon Budget of Tidal Wetlands, Estuaries, and Shelf
Waters of Eastern North America, Global Biogeochem. Cy., 32, 389–416,
https://doi.org/10.1002/2017GB005790, 2018.
Neubauer, D., Ferrachat, S., Siegenthaler-Le Drian, C., Stoll, J., Folini,
D. S., Tegen, I., Wieners, K.-H., Mauritsen, T., Stemmler, I., Barthel, S.,
Bey, I., Daskalakis, N., Heinold, B., and Kokkola, H, U.: HAMMOZ-Consortium
MPI-ESM1.2-HAM model output prepared for CMIP6 CMIP historical. Version
20190627, Earth Syst. Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.5016,
2019.
Orr, J. C., Najjar, R. G., Aumont, O., Bopp, L., Bullister, J. L.,
Danabasoglu, G., Doney, S. C., Dunne, J. P., Dutay, J. C., Graven, H.,
Griffies, S. M., John, J. G., Joos, F., Levin, I., Lindsay, K., Matear, R.
J., McKinley, G. A., Mouchet, A., Oschlies, A., Romanou, A., Schlitzer, R.,
Tagliabue, A., Tanhua, T., and Yool, A.: Biogeochemical protocols and
diagnostics for the CMIP6 Ocean Model Intercomparison Project (OMIP),
Geosci. Model Dev., 10, 2169–2199,
https://doi.org/10.5194/gmd-10-2169-2017, 2017.
Ploug, H., Grossart, H. P., Azam, F., and Jørgensen, B. B.:
Photosynthesis, respiration, and carbon turnover in sinking marine snow from
surface waters of Southern California Bight: implications for the carbon
cycle in the ocean, Mar. Ecol. Prog. Ser., 179, 1–11,
https://doi.org/10.3354/meps179001, 1999.
Poulton, A. J., Adey, T. R., Balch, W. M., and Holligan, P. M.: Relating
coccolithophore calcification rates to phytoplankton community dynamics:
Regional differences and implications for carbon export, Deep-Sea Res. Pt.
II, 54, 538–557,
https://doi.org/10.1016/j.dsr2.2006.12.003, 2007.
Qian, Y., Jochens, A. E., Kennicutt Ii, M. C., and Biggs, D. C.: Spatial and
temporal variability of phytoplankton biomass and community structure over
the continental margin of the northeast Gulf of Mexico based on pigment
analysis, Cont. Shelf Res., 23, 1–17,
https://doi.org/10.1016/S0278-4343(02)00173-5, 2003.
Raven, J. A. and Giordano, M.: Biomineralization by photosynthetic
organisms: Evidence of coevolution of the organisms and their environment?,
Geobiology, 7, 140–154, https://doi.org/10.1111/j.1472-4669.2008.00181.x,
2009.
Raven, M. R., Keil, R. G., and Webb, S. M.: Microbial sulfate reduction and
organic sulfur formation in sinking marine particles, Science, 371,
178–181, https://doi.org/10.1126/science.abc6035, 2021.
Reiman, J. H. and Xu, Y. J.: Dissolved carbon export and CO2 outgassing from
the lower Mississippi River – Implications of future river carbon fluxes,
J. Hydrol., 578, 124093, https://doi.org/10.1016/j.jhydrol.2019.124093,
2019.
Renforth, P. and Henderson, G.: Assessing ocean alkalinity for carbon
sequestration, Rev. Geophys., 55, 636–674,
https://doi.org/10.1002/2016RG000533, 2017.
Robbins, L. L., Wanninkhof, R., Barbero, L., Hu, X., Mitra, S., Yvon-Lewis, S., Cai, W., Huang, W., and and Ryerson, T.: Air-sea exchange, Report of The US Gulf of Mexico Carbon Cycle Synthesis Workshop, U.S. Geol. Surv., St. Petersburg, FL. Ocean Carbon & Biogeochemistry, 67 pp., 2014.
Rost, B. and Riebesell, U.: Coccolithophores and the biological pump: responses to environmental changes, Coccolithophores, Springer, Berlin, Heidelberg, 99–125, https://doi.org/10.1007/978-3-662-06278-4_5, 2004.
Saha, S., Moorthi, S., Pan, H., Wu, X., Wang, J., Nadiga, S., Tripp, P., Kistler, R., Woollen, J., Behringer, D., Liu, H., Stokes, D., Grumbine, R., Gayno, G., Wang, J., Hou, Y., Chuang, H., Juang, H. H., Sela, J., Iredell, M., Treadon, R., Kleist, D., Delst, P. V., Keyser, D., Derber, J., Ek, M., Meng, J., Wei, H., Yang, R., Lord, S., van den Dool, H., Kumar, A., Wang, W., Long, C., Chelliah, M., Xue, Y., Huang, B., Schemm, J., Ebisuzaki, W., Lin, R., Xie, P., Chen, M., Zhou, S., Higgins, W., Zou, C., Liu, Q., Chen, Y., Han, Y., Cucurull, L., Reynolds, R. W., Rutledge, G., and Goldberg, M.: NCEP Climate Forecast System Reanalysis (CFSR) Selected Hourly Time-Series Products, January 1979 to December 2010, Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory, https://doi.org/10.5065/D6513W89, 2010.
Saha, S., Moorthi, S., Wu, X., Wang, J., Nadiga, S., Tripp, P., Behringer, D., Hou, Y., Chuang, H., Iredell, M., Ek, M., Meng, J., Yang, R., Mendez, M. P., van den Dool, H., Zhang, Q., Wang, W., Chen, M., and Becker, E.: NCEP Climate Forecast System Version 2 (CFSv2) 6-hourly Products, Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory, https://doi.org/10.5065/D61C1TXF, 2011.
Seland, Ø., Bentsen, M., Oliviè, D. J. L., Toniazzo, T., Gjermundsen,
A., Graff, L. S., Debernard, J. B., Gupta, A. K., He, Y., Kirkevåg, A.,
Schwinger, J., Tjiputra, J., Aas, K. S., Bethke, I., Fan, Y., Griesfeller,
J., Grini, A., Guo, C., Ilicak, M., Karset, I. H. H., Landgren, O. A.,
Liakka, J., Moseid, K. O., Nummelin, A., Spensberger, C., Tang, H., Zhang,
Z., Heinze, C., Iversen, T., and Schulz, M.: NCC NorESM2-LM model output
prepared for CMIP6 CMIP historical, Version 20190815, Earth Syst. Grid Fed.,
https://doi.org/10.22033/ESGF/CMIP6.8036, 2019.
Shchepetkin, A. F. and McWilliams, J. C.: The regional oceanic modeling
system (ROMS): A split-explicit, free-surface,
topography-following-coordinate oceanic model, Ocean Model., 9, 347–404,
https://doi.org/10.1016/j.ocemod.2004.08.002, 2005.
Shen, Y., Fichot, C. G., and Benner, R.: Floodplain influence on dissolved
organic matter composition and export from the Mississippi – Atchafalaya
River system to the Gulf of Mexico, Limnol. Oceanogr., 57, 1149–116,
https://doi.org/10.4319/lo.2012.57.4.1149, 2012.
Skamarock, W. C., Klemp, J. B., Dudhi, J., Gill, D. O., Barker, D. M., Duda,
M. G., Huang, X.-Y., Wang, W., and Powers, J. G.: A Description of the
Advanced Research WRF Version 3, Tech. Rep., 113,
https://doi.org/10.5065/D6DZ069T, 2005.
Smith, S. V. and Hollibaugh, J. T.: Coastal metabolism and the oceanic
organic carbon balance, Rev. Geophys., 31, 75–89,
https://doi.org/10.1029/92RG02584, 1993.
Stackpoole, S. M., Stets, E. G., Clow, D. W., Burns, D. A., Aiken, G. R.,
Aulenbach, B. T., Creed, I. F., Hirsch, R. M., Laudon, H., Pellerin, B. A.,
and Striegl, R. G.: Spatial and temporal patterns of dissolved organic
matter quantity and quality in the Mississippi River Basin, 1997–2013,
Hydrol. Process., 31, 902–915, https://doi.org/10.1002/hyp.11072, 2017.
Strom, S. L. and Strom, M. W.: Microplankton growth, grazing, and community
structure in the northern Gulf of Mexico, Mar. Ecol. Prog. Ser., 130,
229–240, https://doi.org/10.3354/meps130229, 1996.
Sunda, W. G. and Cai, W. J.: Eutrophication induced CO2-acidification of
subsurface coastal waters: Interactive effects of temperature, salinity, and
atmospheric PCO2, Environ. Sci. Technol., 46, 10651–10659,
https://doi.org/10.1021/es300626f, 2012.
Swart, N. C., Cole, J. N. S., Kharin, V. V., Lazare, M., Scinocca, J. F.,
Gillett, N. P., Anstey, J., Arora, V., Christian, J. R., Jiao, Y., Lee, W.
G., Majaess, F., Saenko, O. A., Seiler, C., and Seinen, M.: CCCma CanESM5
model output prepared for CMIP6 CMIP historical, Version 20190429, Earth
Syst. Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.3610, 2019.
Takahashi, T., Olafsson, J., Goddard, J. G., Chipman, D. W., and Sutherland,
S. C.: Seasonal variation of CO2 and nutrients in the high-latitude surface
oceans: A comparative study, Global Biogeochem. Cy., 7, 843–878,
https://doi.org/10.1029/93GB02263, 1993.
Takahashi, T., Sutherland, S. C., Sweeney, C., Poisson, A., Metzl, N.,
Tilbrook, B., Bates, N., Wanninkhof, R., Feely, R. A., Sabine, C., Olafsson,
J., and Nojiri, Y.: Global sea–air CO2 flux based on climatological surface
ocean pCO2, and seasonal biological and temperature effects, Deep-Sea Res.
Pt. II, 49, 1601–1622,
https://doi.org/10.1016/S0967-0645(02)00003-6, 2002.
Takahashi, T., Sutherland, S. C., and Kozyr, A.: Global ocean surface water partial pressure of CO2 database: Measurements performed during 1957–2016 (version 2016), ORNL/CDIAC-161, NDP-088 (V2015), Carbon Dioxide Information Analysis Center, Oak Ridge National Laboratory, US Department of Energy, Oak Ridge, Tennessee, Dataset, Document available at: https://www.nodc.noaa.gov/ocads/oceans/LDEO_Underway_Database/NDP-088_V2016.pdf, 2017.
Takahashi, T., Sutherland, S., Chipman, D. W., Goddard, J. G., Newberger,
T., and Sweeney, C.: Climatological Distributions of pH, pCO2, Total CO2,
Alkalinity, and CaCO3 Saturation in the Global Surface Ocean (NCEI Accession
0164568), NOAA Natl. Centers Environ. Information Dataset, https://doi.org/10.3334/cdiac/otg.ndp094, 2017.
Tao, B., Tian, H., Ren, W., Yang, J., Yang, Q., He, R., Cai, W., and
Lohrenz, S.: Increasing Mississippi river discharge throughout the 21st
century influenced by changes in climate, land use, and atmospheric CO2,
Geophys. Res. Lett., 41, 4978–4986, 2014.
Thomas, H., Schiettecatte, L.-S., Suykens, K., Koné, Y. J. M., Shadwick, E. H., Prowe, A. E. F., Bozec, Y., de Baar, H. J. W., and Borges, A. V.: Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments, Biogeosciences, 6, 267–274, https://doi.org/10.5194/bg-6-267-2009, 2009.
Todd-Brown, K. E. O., Randerson, J. T., Hopkins, F., Arora, V., Hajima, T., Jones, C., Shevliakova, E., Tjiputra, J., Volodin, E., Wu, T., Zhang, Q., and Allison, S. D.: Changes in soil organic carbon storage predicted by Earth system models during the 21st century, Biogeosciences, 11, 2341–2356, https://doi.org/10.5194/bg-11-2341-2014, 2014.
Torres, R., Pantoja, S., Harada, N., González, H. E., Daneri, G.,
Frangopulos, M., Rutllant, J. A., Duarte, C. M., Rúiz-Halpern, S.,
Mayol, E., and Fukasawa, M.: Air-sea CO2 fluxes along the coast of Chile:
From CO2 outgassing in central northern upwelling waters to CO2 uptake in
southern Patagonian fjords, J. Geophys. Res.-Ocean., 116, 1–17,
https://doi.org/10.1029/2010JC006344, 2011.
Turner, J. T.: Zooplankton fecal pellets, marine snow, phytodetritus and the
ocean's biological pump, Prog. Oceanogr., 130, 205–248,
https://doi.org/10.1016/j.pocean.2014.08.005, 2015.
Wallmann, K., Aloisi, G., Haeckel, M., Tishchenko, P., Pavlova, G.,
Greinert, J., Kutterolf, S., and Eisenhauer, A.: Silicate weathering in
anoxic marine sediments, Geochim. Cosmochim. Ac., 72, 2895–2918,
https://doi.org/10.1016/j.gca.2008.03.026, 2008.
Wang, H., Hu, X., Cai, W. J., and Rabalais, N. N.: Comparison of fCO2
trends in river dominant and ocean dominant ocean margins, Am. Geophys.
Union, 2016.
Wang, X., Cai, Y., Guo, L., and Dist, V.: Variations in abundance and size distribution of carbohydrates in the lower Mississippi River, Pearl River and Bay of St Louis, Estuar. Coast. Shelf Sci., 126,
61–69, https://doi.org/10.1016/j.ecss.2013.04.008, 2013.
Wanninkhof, R.: Relationship between wind speed and gas exchange over the
ocean, J. Geophys. Res., 97, 7373–7382, https://doi.org/10.1029/92JC00188,
1992.
Wanninkhof, R.: Relationship between wind speed and gas exchange over the
ocean revisited, Limnol. Oceanogr. Methods, 12, 351–362,
https://doi.org/10.4319/lom.2014.12.351, 2014.
Wanninkhof, R., Zhang, J.-Z., Baringer, M. O., Langdon, C., Cai, W.-J.,
Salisbury, J. E., and Byrne, R. H.: Partial pressure (or fugacity) of carbon
dioxide, dissolved inorganic carbon, alkalinity, temperature, salinity and
other variables collected from Surface underway, discrete sample and profile
observations using Alkalinity titrator, Barometric pressure sensor and other
instruments from NOAA Ship RONALD H. BROWN in the Coastal Waters of Florida,
Gray's Reef National Marine Sanctuary and others from 2007-05-11 to
2007-08-04 (NCEI Accession 0083633), NOAA Natl. Centers Environ.
Information Dataset,
https://doi.org/10.3334/cdiac/otg.clivar_nacp_east_coast_cruise_2007, 2013.
Wanninkhof, R., Zhang, J.-Z., Baringer, M. O., Langdon, C., Cai, W.-J.,
Salisbury, J. E., and Byrne, R. H.: Partial pressure (or fugacity) of carbon
dioxide, dissolved inorganic carbon, pH, alkalinity, temperature, salinity
and other variables collected from discrete sample and profile observations
using CTD, bottle and other instruments from NOAA Ship RONALD H. BROWN in
the Gray's Reef National Marine Sanctuary, Gulf of Mexico and North Atlantic
Ocean from 2012-07-21 to 2012-08-13 (NCEI Accession 0157619), NOAA Natl.
Centers Environ. Information Dataset,
https://doi.org/10.3334/cdiac/otg.coastal_gomecc2, 2016.
Wanninkhof, R., Triñanes, J., Park, G. H., Gledhill, D., and Olsen, A.:
Large Decadal Changes in Air-Sea CO2 Fluxes in the Caribbean Sea, J.
Geophys. Res.-Ocean., 124, 6960–6982, https://doi.org/10.1029/2019JC015366,
2019.
Warner, J. C., Armstrong, B., He, R., and Zambon, J. B.: Development of a Coupled Ocean-Atmosphere-Wave-Sediment Transport (COAWST) Modeling System, Ocean Model., 35, 230–244, https://doi.org/10.1016/j.ocemod.2010.07.010, 2010.
Weiss, R.: Carbon dioxide in water and seawater: the solubility of a
non-ideal gas, Mar. Chem., 2, 203–215,
https://doi.org/10.1016/0304-4203(74)90015-2, 1974.
Wieners, K.-H., Giorgetta, M., Jungclaus, J., Reick, C., Esch, M., Bittner,
M., Legutke, S., Schupfner, M., Wachsmann, F., Gayler, V., Haak, H., de
Vrese, P., Raddatz, T., and Mauritsen, Thorst, E.: MPI-M MPI-ESM1.2-LR model
output prepared for CMIP6 CMIP historical. Version 20190710, Earth Syst.
Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.6595, 2019.
Wilson, R. W., Millero, F. J., Taylor, J. R., Walsh, P. J., Christensen, V.,
Jennings, S., and Grosell, M.: Contribution of fish to the marine inorganic
carbon cycle, Science, 323, 359–362, 2009.
Wollast, R. and Mackenzie, F. T.: Global biogeochemical cycles and climate,
Clim. Geo-sciences, Springer, 453–473,
https://doi.org/10.1007/978-94-009-2446-8_26, 1989.
Xu, Y. J. and DelDuco, E. M.: Unravelling the relative contribution of dissolved carbon by the Red River to the Atchafalaya River, Water, 9, 871, https://doi.org/10.3390/w9110871, 2017.
Xue, Z., He, R., Fennel, K., Cai, W.-J., Lohrenz, S., Huang, W.-J., Tian, H., Ren, W., and Zang, Z.: Modeling pCO2 variability in the Gulf of Mexico, Biogeosciences, 13, 4359–4377, https://doi.org/10.5194/bg-13-4359-2016, 2016.
Yao, H. and Hu, X.: Responses of carbonate system and CO2 flux to extended drought and intense flooding in a semiarid subtropical estuary, Limnol. Oceanogr., 62, S112–S130, https://doi.org/10.1002/lno.10646, 2017.
Zang, Z., Xue, Z. G., Xu, K., Bentley, S. J., Chen, Q., D’Sa, E. J., and Ge, Q.: A Two Decadal (1993–2012) Numerical Assessment of Sediment Dynamics in the Northern Gulf of Mexico, Water, 11, 938, https://doi.org/10.3390/w11050938, 2019.
Zang, Z., Xue, Z. G., Xu, K., Bentley, S. J., Chen, Q., D'Sa, E. J., Zhang, L., and Ou, Y.: The role of sediment-induced light attenuation on primary production during Hurricane Gustav (2008), Biogeosciences, 17, 5043–5055, https://doi.org/10.5194/bg-17-5043-2020, 2020.
Zeebe, R. and Wolf-Gladrow, D.: CO2 in Seawater: Equilibrium, Kinetics,
Isotopes, Amsterdam, Elsevier Science, The Netherlands: Elsevier
Elsevier Oceanography Book Series, 65, 346 pp, Amsterdam, http://113.160.249.209:8080/xmlui/handle/123456789/2912, 2001.
Zhang, X., Hetland, R. D., Marta-Almeida, M., and DiMarco, S. F.: A numerical investigation of the Mississippi and Atchafalaya freshwater transport, filling and flushing times on the Texas-Louisiana Shelf, J. Geophys. Res. Ocean., 117, C11009, https://doi.org/https://doi.org/10.1029/2012JC008108, 2012.
Ziehn, T., Chamberlain, M., Lenton, A., Law, R., Bodman, R., Dix, M., Wang,
Y., Dobrohotoff, P., Srbinovsky, J., Stevens, L., Vohralik, P., Mackallah,
C., Sullivan, A., O'Farrell, S., and Druken, K.: CSIRO ACCESS-ESM1.5 model
output prepared for CMIP6 CMIP historical, Version 20191115, Earth Syst.
Grid Fed., https://doi.org/10.22033/ESGF/CMIP6.4272, 2019.
Zhong, S. and Mucci, A.: Calcite and aragaonite precipitation from seawater solutions of various salinities : Precipitation rates and overgrowth compositions, Chem. Geol., 78, 283–299, https://doi.org/10.1016/0009-2541(89)90064-8, 1989.
Zondervan, I., Zeebe, R. E., Rost, B., and Riebesell, U.: Decreasing marine
biogenic calcification: A negative feedback on rising atmospheric pCO2,
Global Biogeochem. Cy., 15, 507–516,
https://doi.org/10.1029/2000GB001321, 2001.
Zuddas, P. and Mucci, A.: Kinetics of calcite precipitation from seawater:
II. The influence of the ionic strength, Geochim. Cosmochim. Ac., 62,
757–766, https://doi.org/10.1016/S0016-7037(98)00026-X, 1998.
Short summary
We adopt a high-resolution carbon model for the Gulf of Mexico (GoM) and calculate the decadal trends of important carbon system variables in the GoM from 2001 to 2019. The GoM surface CO2 values experienced a steady increase over the past 2 decades, and the ocean surface pH is declining. Although carbonate saturation rates remain supersaturated with aragonite, they show a slightly decreasing trend. The northern GoM is a stronger carbon sink than we thought.
We adopt a high-resolution carbon model for the Gulf of Mexico (GoM) and calculate the decadal...
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