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
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, 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.
Yanda Ou and Z. George Xue
Biogeosciences Discuss., https://doi.org/10.5194/bg-2022-3, https://doi.org/10.5194/bg-2022-3, 2022
Preprint under review for BG
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The Louisiana-Texas Shelf has been suffering recurring hypoxia (dissolved oxygen < 2 mg/L) over the past decades. In this study, we adapt and further developed a numerical ocean model to the Gulf of Mexico to simulate the physics and associated biogeochemical process to understand the mechanism of the hypoxia development. We performed a 15-year model simulation covering 2006–2020 and explore the controlling mechanism of hypoxia development in different parts of the shelf.
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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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
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Metabolic alkalinity release from large port facilities (Hamburg, Germany) and impact on coastal carbon storage
Observed and projected global warming pressure on coastal hypoxia
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Unprecedented summer hypoxia in southern Cape Cod Bay: an ecological response to regional climate change?
Interannual variabilities, long-term trends, and regulating factors of low-oxygen conditions in the coastal waters off Hong Kong
Causes of the extensive hypoxia in the Gulf of Riga in 2018
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Drought recorded by Ba∕Ca in coastal benthic foraminifera
A nitrate budget of the Bohai Sea based on an isotope mass balance model
Suspended particulate matter drives the spatial segregation of nitrogen turnover along the hyper-turbid Ems estuary
Marine CO2 system variability along the northeast Pacific Inside Passage determined from an Alaskan ferry
Reviews and syntheses: Spatial and temporal patterns in seagrass metabolic fluxes
Mixed layer depth dominates over upwelling in regulating the seasonality of ecosystem functioning in the Peruvian upwelling system
Temporal dynamics of surface ocean carbonate chemistry in response to natural and simulated upwelling events during the 2017 coastal El Niño near Callao, Peru
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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.
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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.
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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.
Michael M. Whitney
Biogeosciences, 19, 4479–4497, https://doi.org/10.5194/bg-19-4479-2022, https://doi.org/10.5194/bg-19-4479-2022, 2022
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Coastal hypoxia is a major environmental problem of increasing severity. The 21st-century projections analyzed indicate global coastal waters will warm and experience rapid declines in oxygen. The forecasted median coastal trends for increasing sea surface temperature and decreasing oxygen capacity are 48 % and 18 % faster than the rates observed over the last 4 decades. Existing hypoxic areas are expected to worsen, and new hypoxic areas likely will emerge under these warming-related pressures.
Bryce Van Dam, Nele Lehmann, Mary A. Zeller, Andreas Neumann, Daniel Pröfrock, Marko Lipka, Helmuth Thomas, and Michael Ernst Böttcher
Biogeosciences, 19, 3775–3789, https://doi.org/10.5194/bg-19-3775-2022, https://doi.org/10.5194/bg-19-3775-2022, 2022
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We quantified sediment–water exchange at shallow sites in the North and Baltic seas. We found that porewater irrigation rates in the former were approximately twice as high as previously estimated, likely driven by relatively high bioirrigative activity. In contrast, we found small net fluxes of alkalinity, ranging from −35 µmol m−2 h−1 (uptake) to 53 µmol m−2 h−1 (release). We attribute this to low net denitrification, carbonate mineral (re-)precipitation, and sulfide (re-)oxidation.
Jiaying Abby Guo, Robert Strzepek, Anusuya Willis, Aaron Ferderer, and Lennart Thomas Bach
Biogeosciences, 19, 3683–3697, https://doi.org/10.5194/bg-19-3683-2022, https://doi.org/10.5194/bg-19-3683-2022, 2022
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Ocean alkalinity enhancement is a CO2 removal method with significant potential, but it can lead to a perturbation of the ocean with trace metals such as nickel. This study tested the effect of increasing nickel concentrations on phytoplankton growth and photosynthesis. We found that the response to nickel varied across the 11 phytoplankton species tested here, but the majority were rather insensitive. We note, however, that responses may be different under other experimental conditions.
Malcolm E. Scully, W. Rockwell Geyer, David Borkman, Tracy L. Pugh, Amy Costa, and Owen C. Nichols
Biogeosciences, 19, 3523–3536, https://doi.org/10.5194/bg-19-3523-2022, https://doi.org/10.5194/bg-19-3523-2022, 2022
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For two consecutive summers, the bottom waters in southern Cape Cod Bay became severely depleted of dissolved oxygen. Low oxygen levels in bottom waters have never been reported in this area before, and this unprecedented occurrence is likely the result of a new algae species that recently began blooming during the late-summer months. We present data suggesting that blooms of this new species are the result of regional climate change including warmer waters and changes in summer winds.
Zheng Chen, Bin Wang, Chuang Xu, Zhongren Zhang, Shiyu Li, and Jiatang Hu
Biogeosciences, 19, 3469–3490, https://doi.org/10.5194/bg-19-3469-2022, https://doi.org/10.5194/bg-19-3469-2022, 2022
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Deterioration of low-oxygen conditions in the coastal waters off Hong Kong was revealed by monitoring data over two decades. The declining wind forcing and the increasing nutrient input contributed significantly to the areal expansion and intense deterioration of low-oxygen conditions. Also, the exacerbated eutrophication drove a shift in the dominant source of organic matter from terrestrial inputs to in situ primary production, which has probably led to an earlier onset of hypoxia in summer.
Stella-Theresa Stoicescu, Jaan Laanemets, Taavi Liblik, Māris Skudra, Oliver Samlas, Inga Lips, and Urmas Lips
Biogeosciences, 19, 2903–2920, https://doi.org/10.5194/bg-19-2903-2022, https://doi.org/10.5194/bg-19-2903-2022, 2022
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Coastal basins with high input of nutrients often suffer from oxygen deficiency. In summer 2018, the extent of oxygen depletion was exceptional in the Gulf of Riga. We analyzed observational data and found that extensive oxygen deficiency appeared since the water layer close to the seabed, where oxygen is consumed, was separated from the surface layer. The problem worsens if similar conditions restricting vertical transport of oxygen occur more frequently in the future.
Justin C. Tiano, Jochen Depestele, Gert Van Hoey, João Fernandes, Pieter van Rijswijk, and Karline Soetaert
Biogeosciences, 19, 2583–2598, https://doi.org/10.5194/bg-19-2583-2022, https://doi.org/10.5194/bg-19-2583-2022, 2022
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This study gives an assessment of bottom trawling on physical, chemical, and biological characteristics in a location known for its strong currents and variable habitats. Although trawl gears only removed the top 1 cm of the seabed surface, impacts on reef-building tubeworms significantly decreased carbon and nutrient cycling. Lighter trawls slightly reduced the impact on fauna and nutrients. Tubeworms were strongly linked to biogeochemical and faunal aspects before but not after trawling.
Inda Brinkmann, Christine Barras, Tom Jilbert, Tomas Næraa, K. Mareike Paul, Magali Schweizer, and Helena L. Filipsson
Biogeosciences, 19, 2523–2535, https://doi.org/10.5194/bg-19-2523-2022, https://doi.org/10.5194/bg-19-2523-2022, 2022
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The concentration of the trace metal barium (Ba) in coastal seawater is a function of continental input, such as riverine discharge. Our geochemical records of the severely hot and dry year 2018, and following wet year 2019, reveal that prolonged drought imprints with exceptionally low Ba concentrations in benthic foraminiferal calcium carbonates of coastal sediments. This highlights the potential of benthic Ba / Ca to trace past climate extremes and variability in coastal marine records.
Shichao Tian, Birgit Gaye, Jianhui Tang, Yongming Luo, Wenguo Li, Niko Lahajnar, Kirstin Dähnke, Tina Sanders, Tianqi Xiong, Weidong Zhai, and Kay-Christian Emeis
Biogeosciences, 19, 2397–2415, https://doi.org/10.5194/bg-19-2397-2022, https://doi.org/10.5194/bg-19-2397-2022, 2022
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We constrain the nitrogen budget and in particular the internal sources and sinks of nitrate in the Bohai Sea by using a mass-based and dual stable isotope approach based on δ15N and δ18O of nitrate. Based on available mass fluxes and isotope data an updated nitrogen budget is proposed. Compared to previous estimates, it is more complete and includes the impact of the interior cycle (nitrification) on the nitrate pool. The main external nitrogen sources are rivers contributing 19.2 %–25.6 %.
Gesa Schulz, Tina Sanders, Justus E. E. van Beusekom, Yoana G. Voynova, Andreas Schöl, and Kirstin Dähnke
Biogeosciences, 19, 2007–2024, https://doi.org/10.5194/bg-19-2007-2022, https://doi.org/10.5194/bg-19-2007-2022, 2022
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Estuaries can significantly alter nutrient loads before reaching coastal waters. Our study of the heavily managed Ems estuary (Northern Germany) reveals three zones of nitrogen turnover along the estuary with water-column denitrification in the most upstream hyper-turbid part, nitrate production in the middle reaches and mixing/nitrate uptake in the North Sea. Suspended particulate matter was the overarching control on nitrogen cycling in the hyper-turbid estuary.
Wiley Evans, Geoffrey T. Lebon, Christen D. Harrington, Yuichiro Takeshita, and Allison Bidlack
Biogeosciences, 19, 1277–1301, https://doi.org/10.5194/bg-19-1277-2022, https://doi.org/10.5194/bg-19-1277-2022, 2022
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Information on the marine carbon dioxide system along the northeast Pacific Inside Passage has been limited. To address this gap, we instrumented an Alaskan ferry in order to characterize the marine carbon dioxide system in this region. Data over a 2-year period were used to assess drivers of the observed variability, identify the timing of severe conditions, and assess the extent of contemporary ocean acidification as well as future levels consistent with a 1.5 °C warmer climate.
Melissa Ward, Tye L. Kindinger, Heidi K. Hirsh, Tessa M. Hill, Brittany M. Jellison, Sarah Lummis, Emily B. Rivest, George G. Waldbusser, Brian Gaylord, and Kristy J. Kroeker
Biogeosciences, 19, 689–699, https://doi.org/10.5194/bg-19-689-2022, https://doi.org/10.5194/bg-19-689-2022, 2022
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Here, we synthesize the results from 62 studies reporting in situ rates of seagrass metabolism to highlight spatial and temporal variability in oxygen fluxes and inform efforts to use seagrass to mitigate ocean acidification. Our analyses suggest seagrass meadows are generally autotrophic and variable in space and time, and the effects on seawater oxygen are relatively small in magnitude.
Tianfei Xue, Ivy Frenger, A. E. Friederike Prowe, Yonss Saranga José, and Andreas Oschlies
Biogeosciences, 19, 455–475, https://doi.org/10.5194/bg-19-455-2022, https://doi.org/10.5194/bg-19-455-2022, 2022
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The Peruvian system supports 10 % of the world's fishing yield. In the Peruvian system, wind and earth’s rotation bring cold, nutrient-rich water to the surface and allow phytoplankton to grow. But observations show that it grows worse at high upwelling. Using a model, we find that high upwelling happens when air mixes the water the most. Then phytoplankton is diluted and grows slowly due to low light and cool upwelled water. This study helps to estimate how it might change in a warming climate.
Shao-Min Chen, Ulf Riebesell, Kai G. Schulz, Elisabeth von der Esch, Eric P. Achterberg, and Lennart T. Bach
Biogeosciences, 19, 295–312, https://doi.org/10.5194/bg-19-295-2022, https://doi.org/10.5194/bg-19-295-2022, 2022
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Oxygen minimum zones in the ocean are characterized by enhanced carbon dioxide (CO2) levels and are being further acidified by increasing anthropogenic atmospheric CO2. Here we report CO2 system measurements in a mesocosm study offshore Peru during a rare coastal El Niño event to investigate how CO2 dynamics may respond to ongoing ocean deoxygenation. Our observations show that nitrogen limitation, productivity, and plankton community shift play an important role in driving the CO2 dynamics.
Paula Maria Salgado-Hernanz, Aurore Regaudie-de-Gioux, David Antoine, and Gotzon Basterretxea
Biogeosciences, 19, 47–69, https://doi.org/10.5194/bg-19-47-2022, https://doi.org/10.5194/bg-19-47-2022, 2022
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For the first time, this study presents the characteristics of primary production in coastal regions of the Mediterranean Sea based on satellite-borne observations for the period 2002–2016. The study concludes that there are significant spatial and temporal variations among different regions. Quantifying primary production is of special importance in the marine food web and in the sequestration of carbon dioxide from the atmosphere to the deep waters.
Samu Elovaara, Eeva Eronen-Rasimus, Eero Asmala, Tobias Tamelander, and Hermanni Kaartokallio
Biogeosciences, 18, 6589–6616, https://doi.org/10.5194/bg-18-6589-2021, https://doi.org/10.5194/bg-18-6589-2021, 2021
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Dissolved organic matter (DOM) is a significant carbon pool in the marine environment. The composition of the DOM pool, as well as its interaction with microbes, is complex, yet understanding it is important for understanding global carbon cycling. This study shows that two phytoplankton species have different effects on the composition of the DOM pool and, through the DOM they produce, on the ensuing microbial community. These communities in turn have different effects on DOM composition.
Yuan Dong, Qian P. Li, Zhengchao Wu, Yiping Shuai, Zijia Liu, Zaiming Ge, Weiwen Zhou, and Yinchao Chen
Biogeosciences, 18, 6423–6434, https://doi.org/10.5194/bg-18-6423-2021, https://doi.org/10.5194/bg-18-6423-2021, 2021
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Temporal change of plankton growth and grazing are less known in the coastal ocean, not to mention the relevant controlling mechanisms. Here, we performed monthly size-specific dilution experiments outside a eutrophic estuary over a 1-year cycle. Phytoplankton growth was correlated to nutrients and grazing mortality to total chlorophyll a. A selective grazing on small cells may be important for maintaining high abundance of large-chain-forming diatoms in this eutrophic system.
Kiefer O. Forsch, Lisa Hahn-Woernle, Robert M. Sherrell, Vincent J. Roccanova, Kaixuan Bu, David Burdige, Maria Vernet, and Katherine A. Barbeau
Biogeosciences, 18, 6349–6375, https://doi.org/10.5194/bg-18-6349-2021, https://doi.org/10.5194/bg-18-6349-2021, 2021
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We show that for an unperturbed cold western Antarctic Peninsula fjord, the seasonality of iron and manganese is linked to the dispersal of metal-rich meltwater sources. Geochemical measurements of trace metals in meltwaters, porewaters, and seawater, collected during two expeditions, showed a seasonal cycle of distinct sources. Finally, model results revealed that the dispersal of surface meltwater and meltwater plumes originating from under the glacier is sensitive to katabatic wind events.
Jenny Hieronymus, Kari Eilola, Malin Olofsson, Inga Hense, H. E. Markus Meier, and Elin Almroth-Rosell
Biogeosciences, 18, 6213–6227, https://doi.org/10.5194/bg-18-6213-2021, https://doi.org/10.5194/bg-18-6213-2021, 2021
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Dense blooms of cyanobacteria occur every summer in the Baltic Proper and can add to eutrophication by their ability to turn nitrogen gas into dissolved inorganic nitrogen. Being able to correctly estimate the size of this nitrogen fixation is important for management purposes. In this work, we find that the life cycle of cyanobacteria plays an important role in capturing the seasonality of the blooms as well as the size of nitrogen fixation in our ocean model.
Tom Hull, Naomi Greenwood, Antony Birchill, Alexander Beaton, Matthew Palmer, and Jan Kaiser
Biogeosciences, 18, 6167–6180, https://doi.org/10.5194/bg-18-6167-2021, https://doi.org/10.5194/bg-18-6167-2021, 2021
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The shallow shelf seas play a large role in the global cycling of CO2 and also support large fisheries. We use an autonomous underwater vehicle in the central North Sea to measure the rates of change in oxygen and nutrients.
Using these data we determine the amount of carbon dioxide taken out of the atmosphere by the sea and measure how productive the region is.
These observations will be useful for improving our predictive models and help us predict and adapt to a changing ocean.
Puthenveettil Narayana Menon Vinayachandran, Yukio Masumoto, Michael J. Roberts, Jenny A. Huggett, Issufo Halo, Abhisek Chatterjee, Prakash Amol, Garuda V. M. Gupta, Arvind Singh, Arnab Mukherjee, Satya Prakash, Lynnath E. Beckley, Eric Jorden Raes, and Raleigh Hood
Biogeosciences, 18, 5967–6029, https://doi.org/10.5194/bg-18-5967-2021, https://doi.org/10.5194/bg-18-5967-2021, 2021
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Upwelling in the coastal ocean triggers biological productivity and thus enhances fisheries. Therefore, understanding the phenomenon of upwelling and the underlying mechanisms is important. In this paper, the present understanding of the upwelling along the coastline of the Indian Ocean from the coast of Africa all the way up to the coast of Australia is reviewed. The review provides a synthesis of the physical processes associated with upwelling and its impact on the marine ecosystem.
Gaël Many, Caroline Ulses, Claude Estournel, and Patrick Marsaleix
Biogeosciences, 18, 5513–5538, https://doi.org/10.5194/bg-18-5513-2021, https://doi.org/10.5194/bg-18-5513-2021, 2021
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The Gulf of Lion shelf is one of the most productive areas in the Mediterranean. A model is used to study the mechanisms that drive the particulate organic carbon (POC). The model reproduces the annual cycle of primary production well. The shelf appears as an autotrophic ecosystem with a high production and as a source of POC for the adjacent basin. The increase in temperature induced by climate change could impact the trophic status of the shelf.
Alireza Merikhi, Peter Berg, and Markus Huettel
Biogeosciences, 18, 5381–5395, https://doi.org/10.5194/bg-18-5381-2021, https://doi.org/10.5194/bg-18-5381-2021, 2021
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The aquatic eddy covariance technique is a powerful method for measurements of solute fluxes across the sediment–water interface. Data measured by conventional eddy covariance instruments require a time shift correction that can result in substantial flux errors. We introduce a triple O2 sensor eddy covariance instrument that by design eliminates these errors. Deployments next to a conventional instrument in the Florida Keys demonstrate the improvements achieved through the new design.
Jiatang Hu, Zhongren Zhang, Bin Wang, and Jia Huang
Biogeosciences, 18, 5247–5264, https://doi.org/10.5194/bg-18-5247-2021, https://doi.org/10.5194/bg-18-5247-2021, 2021
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In situ observations over 42 years were used to explore the long-term changes to low-oxygen conditions in the Pearl River estuary. Apparent expansion of the low-oxygen conditions in summer was identified, primarily due to the combined effects of increased anthropogenic inputs and decreased sediment load. Large areas of severe low-oxygen events were also observed in early autumn and were formed by distinct mechanisms. The estuary seems to be growing into a seasonal, estuary-wide hypoxic zone.
Indah Ardiningsih, Kyyas Seyitmuhammedov, Sylvia G. Sander, Claudine H. Stirling, Gert-Jan Reichart, Kevin R. Arrigo, Loes J. A. Gerringa, and Rob Middag
Biogeosciences, 18, 4587–4601, https://doi.org/10.5194/bg-18-4587-2021, https://doi.org/10.5194/bg-18-4587-2021, 2021
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Organic Fe speciation is investigated along a natural gradient of the western Antarctic Peninsula from an ice-covered shelf to the open ocean. The two major fronts in the region affect the distribution of ligands. The excess ligands not bound to dissolved Fe (DFe) comprised up to 80 % of the total ligand concentrations, implying the potential to solubilize additional Fe input. The ligands on the shelf can increase the DFe residence time and fuel local primary production upon ice melt.
Melissa R. McCutcheon, Hongming Yao, Cory J. Staryk, and Xinping Hu
Biogeosciences, 18, 4571–4586, https://doi.org/10.5194/bg-18-4571-2021, https://doi.org/10.5194/bg-18-4571-2021, 2021
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We used 5+ years of discrete samples and 10 months of hourly sensor measurements to explore temporal variability and environmental controls on pH and pCO2 at the Aransas Ship Channel. Seasonal and diel variability were both present but small compared to other regions in the literature. Despite the small tidal range, tidal control often surpassed biological control. In comparison with sensor data, discrete samples were generally representative of mean annual and seasonal carbonate chemistry.
Kai G. Schulz, Eric P. Achterberg, Javier Arístegui, Lennart T. Bach, Isabel Baños, Tim Boxhammer, Dirk Erler, Maricarmen Igarza, Verena Kalter, Andrea Ludwig, Carolin Löscher, Jana Meyer, Judith Meyer, Fabrizio Minutolo, Elisabeth von der Esch, Bess B. Ward, and Ulf Riebesell
Biogeosciences, 18, 4305–4320, https://doi.org/10.5194/bg-18-4305-2021, https://doi.org/10.5194/bg-18-4305-2021, 2021
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Upwelling of nutrient-rich deep waters to the surface make eastern boundary upwelling systems hot spots of marine productivity. This leads to subsurface oxygen depletion and the transformation of bioavailable nitrogen into inert N2. Here we quantify nitrogen loss processes following a simulated deep water upwelling. Denitrification was the dominant process, and budget calculations suggest that a significant portion of nitrogen that could be exported to depth is already lost in the surface ocean.
Heiner Dietze and Ulrike Löptien
Biogeosciences, 18, 4243–4264, https://doi.org/10.5194/bg-18-4243-2021, https://doi.org/10.5194/bg-18-4243-2021, 2021
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In recent years fish-kill events caused by oxygen deficit have been reported in Eckernförde Bight (Baltic Sea). This study sets out to understand the processes causing respective oxygen deficits by combining high-resolution coupled ocean circulation biogeochemical modeling, monitoring data, and artificial intelligence.
Jens A. Hölemann, Bennet Juhls, Dorothea Bauch, Markus Janout, Boris P. Koch, and Birgit Heim
Biogeosciences, 18, 3637–3655, https://doi.org/10.5194/bg-18-3637-2021, https://doi.org/10.5194/bg-18-3637-2021, 2021
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The Arctic Ocean receives large amounts of river water rich in terrestrial dissolved organic matter (tDOM), which is an important component of the Arctic carbon cycle. Our analysis shows that mixing of three major freshwater sources is the main factor that regulates the distribution of tDOM concentrations in the Siberian shelf seas. In this context, the formation and melting of the land-fast ice in the Laptev Sea and the peak spring discharge of the Lena River are of particular importance.
Jaard Hauschildt, Soeren Thomsen, Vincent Echevin, Andreas Oschlies, Yonss Saranga José, Gerd Krahmann, Laura A. Bristow, and Gaute Lavik
Biogeosciences, 18, 3605–3629, https://doi.org/10.5194/bg-18-3605-2021, https://doi.org/10.5194/bg-18-3605-2021, 2021
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In this paper we quantify the subduction of upwelled nitrate due to physical processes on the order of several kilometers in the coastal upwelling off Peru and its effect on primary production. We also compare the prepresentation of these processes in a high-resolution simulation (~2.5 km) with a more coarsely resolved simulation (~12 km). To do this, we combine high-resolution shipboard observations of physical and biogeochemical parameters with a complex biogeochemical model configuration.
Samantha A. Siedlecki, Darren Pilcher, Evan M. Howard, Curtis Deutsch, Parker MacCready, Emily L. Norton, Hartmut Frenzel, Jan Newton, Richard A. Feely, Simone R. Alin, and Terrie Klinger
Biogeosciences, 18, 2871–2890, https://doi.org/10.5194/bg-18-2871-2021, https://doi.org/10.5194/bg-18-2871-2021, 2021
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Future ocean conditions can be simulated using projected trends in fossil fuel use paired with Earth system models. Global models generally do not include local processes important to coastal ecosystems. These coastal processes can alter the degree of change projected. Higher-resolution models that include local processes predict modified changes in carbon stressors when compared to changes projected by global models in the California Current System.
Erik Jacobs, Henry C. Bittig, Ulf Gräwe, Carolyn A. Graves, Michael Glockzin, Jens D. Müller, Bernd Schneider, and Gregor Rehder
Biogeosciences, 18, 2679–2709, https://doi.org/10.5194/bg-18-2679-2021, https://doi.org/10.5194/bg-18-2679-2021, 2021
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We use a unique data set of 8 years of continuous carbon dioxide (CO2) and methane (CH4) surface water measurements from a commercial ferry to study upwelling in the Baltic Sea. Its seasonality and regional and interannual variability are examined. Strong upwelling events drastically increase local surface CO2 and CH4 levels and are mostly detected in late summer after long periods of impaired mixing. We introduce an extrapolation method to estimate regional upwelling-induced trace gas fluxes.
Yangyang Zhao, Khanittha Uthaipan, Zhongming Lu, Yan Li, Jing Liu, Hongbin Liu, Jianping Gan, Feifei Meng, and Minhan Dai
Biogeosciences, 18, 2755–2775, https://doi.org/10.5194/bg-18-2755-2021, https://doi.org/10.5194/bg-18-2755-2021, 2021
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In situ oxygen consumption rates were estimated for the first time during destruction of coastal hypoxia as disturbed by a typhoon and its reinstatement in the South China Sea off the Pearl River estuary. The reinstatement of summer hypoxia was rapid with a comparable timescale with that of its initial disturbance from frequent tropical cyclones, which has important implications for better understanding the intermittent nature of coastal hypoxia and its prediction in a changing climate.
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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