Articles | Volume 20, issue 10
https://doi.org/10.5194/bg-20-1937-2023
© Author(s) 2023. 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-20-1937-2023
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
26 May 2023
Research article |
| 26 May 2023
| 26 May 2023
Impacts and uncertainties of climate-induced changes in watershed inputs on estuarine hypoxia
Kyle E. Hinson
CORRESPONDING AUTHOR
Virginia Institute of Marine Science, William & Mary, Gloucester
Point, VA 23062, USA
Marjorie A. M. Friedrichs
Virginia Institute of Marine Science, William & Mary, Gloucester
Point, VA 23062, USA
Raymond G. Najjar
Department of Meteorology and Atmospheric Science, The Pennsylvania
State University, University Park, PA 16802, USA
Maria Herrmann
Department of Meteorology and Atmospheric Science, The Pennsylvania
State University, University Park, PA 16802, USA
Zihao Bian
International Center for Climate and Global Change, Auburn University,
Auburn, AL 36849, USA
Gopal Bhatt
Department of Civil & Environmental Engineering, The Pennsylvania
State University, State College, PA 16801, USA
United States Environmental Protection Agency Chesapeake Bay Program
Office, Annapolis, MD 21401, USA
Pierre St-Laurent
Virginia Institute of Marine Science, William & Mary, Gloucester
Point, VA 23062, USA
Hanqin Tian
Schiller Institute for Integrated Science and Society, Department of
Earth and Environmental Sciences, Boston College, Chestnut Hill, MA 02467,
USA
Gary Shenk
U.S. Geological Survey, Virginia/West Virginia Water Science Center,
Richmond, VA 23228, USA
United States Environmental Protection Agency Chesapeake Bay Program
Office, Annapolis, MD 21401, USA
Related authors
Isaac D. Irby, Marjorie A. M. Friedrichs, Fei Da, and Kyle E. Hinson
Biogeosciences, 15, 2649–2668, https://doi.org/10.5194/bg-15-2649-2018, https://doi.org/10.5194/bg-15-2649-2018, 2018
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We use an estuarine-watershed modeling system of the Chesapeake Bay to examine the impact climate change may have on the ability of nutrient reduction regulations to increase dissolved oxygen. We find that climate change will move the onset of hypoxia ~7 days earlier, while also decreasing oxygen in the bay primarily due to increased temperature. While this effect is smaller than the increase in oxygen due to nutrient reduction, it is enough to limit the regulation's future effectiveness.
Catherine Czajka, Marjorie A. M. Friedrichs, Emily B. Rivest, Pierre St-Laurent, Mark J. Brush, and Fei Da
EGUsphere, https://doi.org/10.5194/egusphere-2024-3359, https://doi.org/10.5194/egusphere-2024-3359, 2024
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Under future acidification, warming, and nutrient management, substantial reductions in shell and tissue weights of Eastern oysters are projected for the Chesapeake Bay. Lower oyster growth rates will be largely driven by reduced calcium carbonate saturation states and reduced food availability. Oyster aquaculture practices in the region will likely be affected, with site selection becoming increasingly important as impacts will be highly spatially variable.
Hanqin Tian, Naiqing Pan, Rona L. Thompson, Josep G. Canadell, Parvadha Suntharalingam, Pierre Regnier, Eric A. Davidson, Michael Prather, Philippe Ciais, Marilena Muntean, Shufen Pan, Wilfried Winiwarter, Sönke Zaehle, Feng Zhou, Robert B. Jackson, Hermann W. Bange, Sarah Berthet, Zihao Bian, Daniele Bianchi, Alexander F. Bouwman, Erik T. Buitenhuis, Geoffrey Dutton, Minpeng Hu, Akihiko Ito, Atul K. Jain, Aurich Jeltsch-Thömmes, Fortunat Joos, Sian Kou-Giesbrecht, Paul B. Krummel, Xin Lan, Angela Landolfi, Ronny Lauerwald, Ya Li, Chaoqun Lu, Taylor Maavara, Manfredi Manizza, Dylan B. Millet, Jens Mühle, Prabir K. Patra, Glen P. Peters, Xiaoyu Qin, Peter Raymond, Laure Resplandy, Judith A. Rosentreter, Hao Shi, Qing Sun, Daniele Tonina, Francesco N. Tubiello, Guido R. van der Werf, Nicolas Vuichard, Junjie Wang, Kelley C. Wells, Luke M. Western, Chris Wilson, Jia Yang, Yuanzhi Yao, Yongfa You, and Qing Zhu
Earth Syst. Sci. Data, 16, 2543–2604, https://doi.org/10.5194/essd-16-2543-2024, https://doi.org/10.5194/essd-16-2543-2024, 2024
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Atmospheric concentrations of nitrous oxide (N2O), a greenhouse gas 273 times more potent than carbon dioxide, have increased by 25 % since the preindustrial period, with the highest observed growth rate in 2020 and 2021. This rapid growth rate has primarily been due to a 40 % increase in anthropogenic emissions since 1980. Observed atmospheric N2O concentrations in recent years have exceeded the worst-case climate scenario, underscoring the importance of reducing anthropogenic N2O emissions.
Hanqin Tian, Zihao Bian, Hao Shi, Xiaoyu Qin, Naiqing Pan, Chaoqun Lu, Shufen Pan, Francesco N. Tubiello, Jinfeng Chang, Giulia Conchedda, Junguo Liu, Nathaniel Mueller, Kazuya Nishina, Rongting Xu, Jia Yang, Liangzhi You, and Bowen Zhang
Earth Syst. Sci. Data, 14, 4551–4568, https://doi.org/10.5194/essd-14-4551-2022, https://doi.org/10.5194/essd-14-4551-2022, 2022
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Nitrogen is one of the critical nutrients for growth. Evaluating the change in nitrogen inputs due to human activity is necessary for nutrient management and pollution control. In this study, we generated a historical dataset of nitrogen input to land at the global scale. This dataset consists of nitrogen fertilizer, manure, and atmospheric deposition inputs to cropland, pasture, and rangeland at high resolution from 1860 to 2019.
Zihao Bian, Hanqin Tian, Qichun Yang, Rongting Xu, Shufen Pan, and Bowen Zhang
Earth Syst. Sci. Data, 13, 515–527, https://doi.org/10.5194/essd-13-515-2021, https://doi.org/10.5194/essd-13-515-2021, 2021
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The estimation of manure nutrient production and application is critical for the efficient use of manure nutrients. This study developed four manure nitrogen and phosphorus datasets with high spatial resolution and a long time period (1860–2017) in the US. The datasets can provide useful information for stakeholders and scientists who focus on agriculture, nutrient budget, and biogeochemical cycle.
Pierre St-Laurent, Marjorie A. M. Friedrichs, Raymond G. Najjar, Elizabeth H. Shadwick, Hanqin Tian, and Yuanzhi Yao
Biogeosciences, 17, 3779–3796, https://doi.org/10.5194/bg-17-3779-2020, https://doi.org/10.5194/bg-17-3779-2020, 2020
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Over the past century, estuaries have experienced global (atmospheric CO2 concentrations and temperature) and regional changes (river inputs, land use), but their relative impact remains poorly known. In the Chesapeake Bay, we find that global and regional changes have worked together to enhance how much atmospheric CO2 is taken up by the estuary. The increased uptake is roughly equally due to the global and regional changes, providing crucial perspective for managers of the bay's watershed.
Katja Fennel, Simone Alin, Leticia Barbero, Wiley Evans, Timothée Bourgeois, Sarah Cooley, John Dunne, Richard A. Feely, Jose Martin Hernandez-Ayon, Xinping Hu, Steven Lohrenz, Frank Muller-Karger, Raymond Najjar, Lisa Robbins, Elizabeth Shadwick, Samantha Siedlecki, Nadja Steiner, Adrienne Sutton, Daniela Turk, Penny Vlahos, and Zhaohui Aleck Wang
Biogeosciences, 16, 1281–1304, https://doi.org/10.5194/bg-16-1281-2019, https://doi.org/10.5194/bg-16-1281-2019, 2019
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We review and synthesize available information on coastal ocean carbon fluxes around North America (NA). There is overwhelming evidence, compiled and discussed here, that the NA coastal margins act as a sink. Our synthesis shows the great diversity in processes driving carbon fluxes in different coastal regions, highlights remaining gaps in observations and models, and discusses current and anticipated future trends with respect to carbon fluxes and acidification.
Isaac D. Irby, Marjorie A. M. Friedrichs, Fei Da, and Kyle E. Hinson
Biogeosciences, 15, 2649–2668, https://doi.org/10.5194/bg-15-2649-2018, https://doi.org/10.5194/bg-15-2649-2018, 2018
Short summary
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We use an estuarine-watershed modeling system of the Chesapeake Bay to examine the impact climate change may have on the ability of nutrient reduction regulations to increase dissolved oxygen. We find that climate change will move the onset of hypoxia ~7 days earlier, while also decreasing oxygen in the bay primarily due to increased temperature. While this effect is smaller than the increase in oxygen due to nutrient reduction, it is enough to limit the regulation's future effectiveness.
Daniel E. Kaufman, Marjorie A. M. Friedrichs, John C. P. Hemmings, and Walker O. Smith Jr.
Biogeosciences, 15, 73–90, https://doi.org/10.5194/bg-15-73-2018, https://doi.org/10.5194/bg-15-73-2018, 2018
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Computer simulations of the highly variable phytoplankton in the Ross Sea demonstrated how incorporating data from different sources (satellite, ship, or glider) results in different system interpretations. For example, simulations assimilating satellite-based data produced lower carbon export estimates. Combining observations with models in this remote, harsh, and biologically variable environment should include consideration of the potential impacts of data frequency, duration, and coverage.
James C. Orr, Raymond G. Najjar, Olivier Aumont, Laurent Bopp, John L. Bullister, Gokhan Danabasoglu, Scott C. Doney, John P. Dunne, Jean-Claude Dutay, Heather Graven, Stephen M. Griffies, Jasmin G. John, Fortunat Joos, Ingeborg Levin, Keith Lindsay, Richard J. Matear, Galen A. McKinley, Anne Mouchet, Andreas Oschlies, Anastasia Romanou, Reiner Schlitzer, Alessandro Tagliabue, Toste Tanhua, and Andrew Yool
Geosci. Model Dev., 10, 2169–2199, https://doi.org/10.5194/gmd-10-2169-2017, https://doi.org/10.5194/gmd-10-2169-2017, 2017
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The Ocean Model Intercomparison Project (OMIP) is a model comparison effort under Phase 6 of the Coupled Model Intercomparison Project (CMIP6). Its physical component is described elsewhere in this special issue. Here we describe its ocean biogeochemical component (OMIP-BGC), detailing simulation protocols and analysis diagnostics. Simulations focus on ocean carbon, other biogeochemical tracers, air-sea exchange of CO2 and related gases, and chemical tracers used to evaluate modeled circulation.
Julia M. Moriarty, Courtney K. Harris, Katja Fennel, Marjorie A. M. Friedrichs, Kehui Xu, and Christophe Rabouille
Biogeosciences, 14, 1919–1946, https://doi.org/10.5194/bg-14-1919-2017, https://doi.org/10.5194/bg-14-1919-2017, 2017
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In coastal aquatic environments, resuspension of sediment and organic material from the seabed into the overlying water can impact biogeochemistry. Here, we used a novel modeling approach to quantify this impact for the Rhône River delta. In the model, resuspension increased oxygen consumption during individual resuspension events, and when results were averaged over 2 months. This implies that observations and models that only represent calm conditions may underestimate net oxygen consumption.
Isaac D. Irby, Marjorie A. M. Friedrichs, Carl T. Friedrichs, Aaron J. Bever, Raleigh R. Hood, Lyon W. J. Lanerolle, Ming Li, Lewis Linker, Malcolm E. Scully, Kevin Sellner, Jian Shen, Jeremy Testa, Hao Wang, Ping Wang, and Meng Xia
Biogeosciences, 13, 2011–2028, https://doi.org/10.5194/bg-13-2011-2016, https://doi.org/10.5194/bg-13-2011-2016, 2016
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A comparison of eight hydrodynamic-oxygen models revealed that while models have difficulty resolving key drivers of dissolved oxygen (DO) variability, all models exhibit skill in reproducing the variability of DO itself. Further, simple oxygen models and complex biogeochemical models reproduced observed DO variability similarly well. Future advances in hypoxia simulations will depend more on the ability to reproduce the depth of the mixed layer than the degree of the vertical density gradient.
J. A. Schulte, C. Duffy, and R. G. Najjar
Nonlin. Processes Geophys., 22, 139–156, https://doi.org/10.5194/npg-22-139-2015, https://doi.org/10.5194/npg-22-139-2015, 2015
Y. Xiao and M. A. M. Friedrichs
Biogeosciences, 11, 3015–3030, https://doi.org/10.5194/bg-11-3015-2014, https://doi.org/10.5194/bg-11-3015-2014, 2014
Related subject area
Biogeochemistry: Coastal Ocean
Temperature-enhanced effects of iron on Southern Ocean phytoplankton
Riverine nutrient impact on global ocean nitrogen cycle feedbacks and marine primary production in an Earth system model
The Northeast Greenland Shelf as a potential late-summer CO2 source to the atmosphere
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
High metabolic zinc demand within native Amundsen and Ross Sea phytoplankton communities determined by stable isotope uptake rate measurements
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
Responses of microbial metabolic rates to non-equilibrated silicate vs calcium-based ocean alkalinity enhancement
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)
Assessing the impacts of simulated Ocean Alkalinity Enhancement on viability and growth of near-shore species of phytoplankton
Seasonality and response of ocean acidification and hypoxia to major environmental anomalies in the southern Salish Sea, North America (2014–2018)
The influence of zooplankton and oxygen on the particulate organic carbon flux in the Benguela Upwelling System
Oceanographic processes driving low-oxygen conditions inside Patagonian fjords
Above- and belowground plant mercury dynamics in a salt marsh estuary in Massachusetts, USA
Reviews and syntheses: Biological Indicators of Oxygen Stress in Water Breathing Animals
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
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
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)
Charlotte Eich, Mathijs van Manen, J. Scott P. McCain, Loay J. Jabre, Willem H. van de Poll, Jinyoung Jung, Sven B. E. H. Pont, Hung-An Tian, Indah Ardiningsih, Gert-Jan Reichart, Erin M. Bertrand, Corina P. D. Brussaard, and Rob Middag
Biogeosciences, 21, 4637–4663, https://doi.org/10.5194/bg-21-4637-2024, https://doi.org/10.5194/bg-21-4637-2024, 2024
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Phytoplankton growth in the Southern Ocean (SO) is often limited by low iron (Fe) concentrations. Sea surface warming impacts Fe availability and can affect phytoplankton growth. We used shipboard Fe clean incubations to test how changes in Fe and temperature affect SO phytoplankton. Their abundances usually increased with Fe addition and temperature increase, with Fe being the major factor. These findings imply potential shifts in ecosystem structure, impacting food webs and elemental cycling.
Miriam Tivig, David P. Keller, and Andreas Oschlies
Biogeosciences, 21, 4469–4493, https://doi.org/10.5194/bg-21-4469-2024, https://doi.org/10.5194/bg-21-4469-2024, 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 increases primary production rates.
Esdoorn Willcox, Marcos Lemes, Thomas Juul-Pedersen, Mikael Kristian Sejr, Johnna Marchiano Holding, and Søren Rysgaard
Biogeosciences, 21, 4037–4050, https://doi.org/10.5194/bg-21-4037-2024, https://doi.org/10.5194/bg-21-4037-2024, 2024
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In this work, we measured the chemistry of seawater from samples obtained from different depths and locations 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. We discuss the variables that may be related to such changes.
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.
Riss M. Kell, Rebecca J. Chmiel, Deepa Rao, Dawn M. Moran, Matthew R. McIlvin, Tristan J. Horner, Nicole L. Schanke, Robert B. Dunbar, Giacomo R. DiTullio, and Mak A. Saito
EGUsphere, https://doi.org/10.5194/egusphere-2024-2085, https://doi.org/10.5194/egusphere-2024-2085, 2024
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Southern Ocean phytoplankton play a pivotal role in regulating the uptake and sequestration of carbon dioxide from the atmosphere. This study describes a new stable zinc isotope uptake rate measurement method used to quantify zinc and cadmium uptake rates within native Southern Ocean phytoplankton communities. This data can better inform biogeochemical model predictions of primary production, carbon export, and atmospheric carbon dioxide flux.
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.
Laura Marin-Samper, Javier Arístegui, Nauzet Hernández-Hernández, and Ulf Riebesell
EGUsphere, https://doi.org/10.5194/egusphere-2024-1776, https://doi.org/10.5194/egusphere-2024-1776, 2024
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This study exposed a natural community to two non-CO2 equilibrated ocean alkalinity enhancement (OAE) deployments using different minerals. Adding alkalinity in this manner decreases dissolved CO2, essential for photosynthesis. While photosynthesis was not suppressed, bloom formation was delayed, potentially impacting marine food webs. The study emphasizes the need for further research on OAE without prior equilibration and its ecological implications
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.
Jessica L. Oberlander, Mackenzie E. Burke, Cat A. London, and Hugh L. MacIntyre
EGUsphere, https://doi.org/10.5194/egusphere-2024-971, https://doi.org/10.5194/egusphere-2024-971, 2024
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OAE is a promising negative emission technology that could restore the oceanic pH and carbonate system to a pre-industrial state. To our knowledge, this paper is the first to assess the potential impact of OAE on phytoplankton through an analysis of prior studies and the effects of simulated OAE on photosynthetic competence. Our findings suggest that there may be little if any significant impact on most phytoplankton studied to date if OAE is conducted in well-flushed, near-shore environments.
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.
Luisa Chiara Meiritz, Tim Rixen, Anja K. van der Plas, Tarron Lamont, and Niko Lahajnar
EGUsphere, https://doi.org/10.5194/egusphere-2024-700, https://doi.org/10.5194/egusphere-2024-700, 2024
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The transport of particles through the water column and their subsequent burial on the seafloor is an important process for carbon storage and the mediation of carbon dioxide in the oceans. Our results from the Benguela Upwelling System distinguish between the northern and southern parts of the study area and between passive (gravitational) and active (zooplankton) transport processes. The decomposition of organic matter is doubtlessly an important factor for the size of oxygen minimum zones.
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.
Michael R. Roman, Andrew H. Altieri, Denise Breitburg, Erica Ferrer, Natalya D. Gallo, Shin-ichi Ito, Karin Limburg, Kenneth Rose, Moriaki Yasuhara, and Lisa A. Levin
EGUsphere, https://doi.org/10.5194/egusphere-2024-616, https://doi.org/10.5194/egusphere-2024-616, 2024
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Oxygen-depleted ocean waters have increased worldwide. In order to improve our understanding of the impacts of this oxygen loss on marine life it is essential that we develop reliable indicators that track the negative impacts of low oxygen. We review various indicators of oxygen stress for marine animals including their use, research needs and application to confront the challenges of ocean oxygen loss.
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.
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.
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.
Cited articles
Abatzoglou, J. T. and Brown, T. J.: A comparison of statistical
downscaling methods suited for wildfire applications, Int. J. Climatol., 32,
772–780, https://doi.org/10.1002/joc.2312, 2012.
Anandhi, A., Frei, A., Pierson, D. C., Schneiderman, E. M., Zion, M. S.,
Lounsbury, D., and Matonse, A. H.: Examination of change factor
methodologies for climate change impact assessment, Water Resour. Res., 47,
1–10, https://doi.org/10.1029/2010WR009104, 2011.
Ator, S., Schwarz, G. E., Sekellick, A. J., and Bhatt, G.: Predicting
Near-Term Effects of Climate Change on Nitrogen Transport to Chesapeake Bay,
J. Am. Water Resour. As., 58, 4, 578–596,
https://doi.org/10.1111/1752-1688.13017, 2022.
Ator, S. W. and Denver, J. M.: Understanding nutrients in the Chesapeake Bay
watershed and implications for management and restoration – the Eastern
Shore (ver. 1.2, June 2015): U.S. Geological Survey Circular 1406, 72 pp.,
https://doi.org/10.3133/cir1406, 2015.
BACC II Author Team: Second Assessment of Climate Change for the Baltic Sea
Basin, in: Regional Climate Studies, edited by: Bolle, H.-J., Menenti, M., and Ichtiaque Rasool, S., Springer International Publishing,
Cham, https://doi.org/10.1007/978-3-319-16006-1, 2015.
Bartosova, A., Capell, R., Olesen, J. E., Jabloun, M., Refsgaard, J. C.,
Donnelly, C., Hyytiäinen, K., Pihlainen, S., Zandersen, M., and
Arheimer, B.: Future socioeconomic conditions may have a larger impact than
climate change on nutrient loads to the Baltic Sea, Ambio, 48, 1325–1336,
https://doi.org/10.1007/s13280-019-01243-5, 2019.
Basenback, N., Testa, J. M., and Shen, C.: Interactions of Warming and
Altered Nutrient Load Timing on the Phenology of Oxygen Dynamics in
Chesapeake Bay, J. Am. Water Resour. As., 59, 429–445,
https://doi.org/10.1111/1752-1688.13101, 2022.
Bevacqua, E., Shepherd, T. G., Watson, P. A. G., Sparrow, S., Wallom, D.,
and Mitchell, D.: Larger Spatial Footprint of Wintertime Total
Precipitation Extremes in a Warmer Climate, Geophys. Res. Lett., 48, e2020GL091990,
https://doi.org/10.1029/2020GL091990, 2021.
Bever, A. J., Friedrichs, M. A. M., Friedrichs, C. T., Scully, M. E., and
Lanerolle, L. W. J.: Combining observations and numerical model results to
improve estimates of hypoxic volume within the Chesapeake Bay, USA, J.
Geophys. Res.-Oceans, 118, 4924–4944,
https://doi.org/10.1002/jgrc.20331, 2013.
Bever, A. J., Friedrichs, M. A. M., Friedrichs, C. T., and Scully, M. E.:
Estimating Hypoxic Volume in the Chesapeake Bay Using Two Continuously
Sampled Oxygen Profiles, J. Geophys. Res.-Oceans, 123, 6392–6407,
https://doi.org/10.1029/2018JC014129, 2018.
Bever, A. J., Friedrichs, M. A. M., and St-Laurent, P.: Real-time
environmental forecasts of the Chesapeake Bay: Model setup, improvements,
and online visualization, Environ. Model. Softw., 140, 105036, https://doi.org/10.1016/j.envsoft.2021.105036, 2021.
Bosshard, T., Carambia, M., Goergen, K., Kotlarski, S., Krahe, P., Zappa,
M., and Schär, C.: Quantifying uncertainty sources in an ensemble of
hydrological climate-impact projections, Water Resour. Res., 49,
1523–1536, https://doi.org/10.1029/2011WR011533, 2013.
Bossier, S., Nielsen, J. R., Almroth-Rosell, E., Höglund, A., Bastardie,
F., Neuenfeldt, S., Wåhlström, I., and Christensen, A.: Integrated
ecosystem impacts of climate change and eutrophication on main Baltic
fishery resources, Ecol. Modell., 453, 109609, https://doi.org/10.1016/j.ecolmodel.2021.109609, 2021.
Breitburg, D., Levin, L. A., Oschlies, A., Grégoire, M., Chavez, F. P.,
Conley, D. J., Garçon, V., Gilbert, D., Gutiérrez, D., Isensee, K.,
Jacinto, G. S., Limburg, K. E., Montes, I., Naqvi, S. W. A., Pitcher, G. C.,
Rabalais, N. N., Roman, M. R., Rose, K. A., Seibel, B. A., Telszewski, M., Yasuhara, M., and Zhang, J.: Declining oxygen in the global ocean and coastal waters, Science, 359, 6371, https://doi.org/10.1126/science.aam7240, 2018.
C3S (Copernicus Climate Change Service): ERA5: Fifth Generation of ECMWF
Atmospheric Reanalyses of the Global Climate, Copernicus Climate Change
Service Climate Data Store (CDS),
https://cds.climate.copernicus.eu/cdsapp#!/home (last access: 16 April 2021), 2017.
Cerco, C. F. and Tian, R.: Impact of Wetlands Loss and Migration, Induced by Climate Change, on Chesapeake Bay DO Standards, J. Am. Water Resour. Assoc., 58, 958–970, https://doi.org/10.1111/1752-1688.12919, 2022.
Cai, X., Shen, J., Zhang, Y. J., Qin, Q., Wang, Z., and Wang, H.: Impacts
of Sea-Level Rise on Hypoxia and Phytoplankton Production in Chesapeake Bay:
Model Prediction and Assessment, J. Am. Water Resour. As., 58, 922–939,
https://doi.org/10.1111/1752-1688.12921, 2021.
Carter, T. R., Parry, M. L., Nishioka, S., and Harasawa, H.: Technical
Guidelines for Assessing Climate Change Impacts and Adaptations.
Intergovernmental Pane1 on Climate Change Working Group II, University
College London and Center for Global Environmental Research, Japan, 60 pp., 1994.
Chang, S. Y., Zhang, Q., Byrnes, D. K., Basu, N. B., and van Meter, K. J.:
Chesapeake legacies: The importance of legacy nitrogen to improving
Chesapeake Bay water quality, Environ. Res. Lett., 16, 085002,
https://doi.org/10.1088/1748-9326/ac0d7b, 2021.
Chesapeake Bay Program: Chesapeake Assessment and Scenario Tool (CAST)
Version 2019, Chesapeake Bay Program Office, https://cast.chesapeakebay.net/ (last access: 3 August 2021), 2020.
CBP DataHub: Chesapeake Bay Program DataHub: http://data.chesapeakebay.net/WaterQuality,
last access: 18 April 2022.
Cubasch, U., Wuebbles, D., Chen, D., Facchini, M. C., Frame, D., Mahowald, N., and
Winther, J.-G.: Introduction, in: Climate Change 2013: The Physical
Science Basis. Contribution of Working Group I to the Fifth Assessment
Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F.,
Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K., Boschung, J., Nauels, A., Xia, Y., Bex,
V., and Midgley, P. M., Cambridge University Press, Cambridge,
United Kingdom and New York, NY, USA, 2013.
Da, F., Friedrichs, M. A. M., St-Laurent, P., Shadwick, E. H., Najjar, R.
G., and Hinson, K. E.: Mechanisms Driving Decadal Changes in the Carbonate
System of a Coastal Plain Estuary, J. Geophys. Res.-Oceans, 126, 1–23,
https://doi.org/10.1029/2021JC017239, 2021.
Dussin, R., Curchitser, E. N., Stock, C. A., and Van Oostende, N.:
Biogeochemical drivers of changing hypoxia in the California Current
Ecosystem, Deep-Sea Res. Pt. II, 169–170, 104590,
https://doi.org/10.1016/j.dsr2.2019.05.013, 2019.
Feng, Y., Friedrichs, M. A. M., Wilkin, J., Tian, H., Yang, Q., Hofmann, E.
E., Wiggert, J. D., and Hood, R. R.: Chesapeake Bay nitrogen fluxes derived
from a land- estuarine ocean biogeochemical modeling system: Model
description, evaluation, and nitrogen budgets, J. Geophys. Res.-Biogeo., 120, 1666–1695, https://doi.org/10.1002/2017JG003800, 2015.
Fennel, K. and Laurent, A.: N and P as ultimate and proximate limiting nutrients in the northern Gulf of Mexico: implications for hypoxia reduction strategies, Biogeosciences, 15, 3121–3131, https://doi.org/10.5194/bg-15-3121-2018, 2018.
Fennel, K., Gehlen, M., Brasseur, P., Brown, C. W., Ciavatta, S., Cossarini,
G., Crise, A., Edwards, C. A., Ford, D., Friedrichs, M. A. M., Gregoire, M.,
Jones, E., Kim, H.-C., Lamouroux, J., Murtugudde, R., Perruche, C., and the
GODAE OceanView Marine Ecosystem Analysis and Prediction Task Team:
Advancing Marine Biogeochemical and Ecosystem Reanalyses and Forecasts as
Tools for Monitoring and Managing Ecosystem Health, Front. Mar. Sci., 6, 89,
https://doi.org/10.3389/fmars.2019.00089, 2019.
Frankel, L. T., Friedrichs, M. A. M., St-Laurent, P., Bever, A. J., Lipcius,
R. N., Bhatt, G., and Shenk, G. W.: Nitrogen reductions have decreased
hypoxia in the Chesapeake Bay: Evidence from empirical and numerical
modeling, Sci. Total Environ., 814, 152722,
https://doi.org/10.1016/j.scitotenv.2021.152722, 2022.
Gilbert, D., Rabalais, N. N., Díaz, R. J., and Zhang, J.: Evidence for greater oxygen decline rates in the coastal ocean than in the open ocean, Biogeosciences, 7, 2283–2296, https://doi.org/10.5194/bg-7-2283-2010, 2010.
Große, F., Fennel, K., Zhang, H., and Laurent, A.: Quantifying the contributions of riverine vs. oceanic nitrogen to hypoxia in the East China Sea, Biogeosciences, 17, 2701–2714, https://doi.org/10.5194/bg-17-2701-2020, 2020.
Gudmundsson, L., Boulange, J., Do, H. X., Gosling, S. N., Grillakis, M. G.,
Koutroulis, A. G., Leonard, M., Liu, J., Schmied, H. M., Papadimitriou, L.,
Pokhrel, Y., Seneviratne, S. I., Satoh, Y., Thiery, W., Westra, S., Zhang,
X., and Zhao, F.: Globally observed trends in mean and extreme river flow
attributed to climate change, Science, 371, 6534, 1159–1162,
https://doi.org/10.1126/science.aba3996, 2021.
Hagy, J. D., Boynton, W. R., Keefe, C. W., and Wood, K. V.: Hypoxia in
Chesapeake Bay, 1950–2001: Long-term change in relation to nutrient loading
and river flow, Estuaries, 27, 634–658,
https://doi.org/10.1007/BF02907650, 2004.
Hanson, J., Bock, E., Asfaw, B., and Easton, Z. M.: A systematic review of
Chesapeake Bay climate change impacts and uncertainty: watershed processes,
pollutant delivery and BMP performance, CBP/TRS-330-22,
https://bit.ly/BMP-CC-synth (last access: 20 September 2022), 2022.
Harding, L. W., Mallonee, M. E., and Perry, E. S.: Toward a predictive
understanding of primary productivity in a temperate, partially stratified
estuary, Estuar. Coast. Shelf S., 55, 437–463,
https://doi.org/10.1006/ecss.2001.0917, 2002.
Hawkins, E. and Sutton, R.: The potential to narrow uncertainty in
regional climate predictions, B. Am. Meteorol. Soc., 90, 1095–1107,
https://doi.org/10.1175/2009BAMS2607.1, 2009.
Hein, B., Viergutz, C., Wyrwa, J., Kirchesch, V., and Schöl, A.:
Impacts of climate change on the water quality of the Elbe Estuary
(Germany), J. Appl. Water Eng. Res., 6, 28–39,
https://doi.org/10.1080/23249676.2016.1209438, 2018.
Hinson, K. E., Friedrichs, M. A. M., St-Laurent, P., Da, F., and Najjar, R.
G.: Extent and Causes of Chesapeake Bay Warming, J. Am. Water Resour.
As., 58, 805–825, https://doi.org/10.1111/1752-1688.12916, 2021.
Hinson, K. E., Friedrichs, M. A. M., and St-Laurent, P.: A Data Repository for Impacts and uncertainties of climate-induced changes in watershed inputs on estuarine hypoxia, Virginia Institute of Marine Science, W&M Scholar Works [data set], https://doi.org/10.25773/5zet-aq32, 2023.
Hirsch, R. M., Moyer, D. L., and Archfield, S. A.: Weighted regressions on
time, discharge, and season (WRTDS), with an application to chesapeake bay
river inputs, J. Am. Water Resour. As., 46, 857–880,
https://doi.org/10.1111/j.1752-1688.2010.00482.x, 2010.
Hong, B., Liu, Z., Shen, J., Wu, H., Gong, W., Xu, H., and Wang, D.:
Potential physical impacts of sea-level rise on the Pearl River Estuary,
China, J. Marine Syst., 201, 103245, https://doi.org/10.1016/j.jmarsys.2019.103245,
2020.
Hood, R. R., Shenk, G. W., Dixon, R. L., Smith, S. M. C., Ball, W. P., Bash,
J. O., Batiuk, R., Boomer, K., Brady, D. C., Cerco, C., Claggett, P., de
Mutsert, K., Easton, Z. M., Elmore, A. J., Friedrichs, M. A. M., Harris, L.
A., Ihde, T. F., Lacher, L., Li, L., Linker, L. C., Miller, A., Moriarty, J., Noe, G. B., Onyullo, G. E., Rose, K., Skalak, K., Tian, R., Veith, T. L., Wainger, L., Weller, D., and Zhang, Y. J.: The
Chesapeake Bay program modeling system: Overview and recommendations for
future development, Ecol. Modell., 456, 109635, https://doi.org/10.1016/j.ecolmodel.2021.109635, 2021.
Howarth, R. W., Swaney, D. P., Boyer, E. W., Marino, R., Jaworski, N., and
Goodale, C.: The influence of climate on average nitrogen export from large
watersheds in the Northeastern United States, Biogeochemistry, 79,
163–186, https://doi.org/10.1007/s10533-006-9010-1, 2006.
Huang, H., Patricola, C. M., Winter, J. M., Osterberg, E. C., and Mankin,
J. S.: Rise in Northeast US extreme precipitation caused by Atlantic
variability and climate change, Weather Clim. Extrem., 33, 100351, https://doi.org/10.1016/j.wace.2021.100351, 2021.
IPCC: Climate Change 2013: The Physical Science Basis. Contribution of Working Group I to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change, edited by: Stocker, T. F., Qin, D., Plattner, G.-K., Tignor, M., Allen, S. K.,
Boschung, J., Nauels, A., Xia, Y., Bex, V., and Midgley, P. M., Cambridge
University Press, Cambridge, United Kingdom and New York, NY, USA, 1535 pp., 2013.
Irby, I. D., Friedrichs, M. A. M., Friedrichs, C. T., Bever, A. J., Hood, R. R., Lanerolle, L. W. J., Li, M., Linker, L., Scully, M. E., Sellner, K., Shen, J., Testa, J., Wang, H., Wang, P., and Xia, M.: Challenges associated with modeling low-oxygen waters in Chesapeake Bay: a multiple model comparison, Biogeosciences, 13, 2011–2028, https://doi.org/10.5194/bg-13-2011-2016, 2016.
Irby, I. D., Friedrichs, M. A. M., Da, F., and Hinson, K. E.: The competing impacts of climate change and nutrient reductions on dissolved oxygen in Chesapeake Bay, Biogeosciences, 15, 2649–2668, https://doi.org/10.5194/bg-15-2649-2018, 2018.
Jarvis, B. M., Pauer, J. J., Melendez, W., Wan, Y., Lehrter, J. C., Lowe, L.
L., and Simmons, C. W.: Inter-model comparison of simulated Gulf of Mexico
hypoxia in response to reduced nutrient loads: Effects of phytoplankton and
organic matter parameterization, Environ. Model. Softw., 151, 105365,
https://doi.org/10.1016/j.envsoft.2022.105365, 2022.
Justić, D., Rabalais, N. N., and Turner, R. E.: Effects of climate
change on hypoxia in coastal waters: A doubled CO2 scenario for the northern
Gulf of Mexico, Limnol. Oceanogr., 41, 992–1003,
https://doi.org/10.4319/lo.1996.41.5.0992, 1996.
Justić, D., Rabalais, N. N., and Turner, R. E.: Simulated responses of
the Gulf of Mexico hypoxia to variations in climate and anthropogenic
nutrient loading, J. Marine Syst., 42, 115–126,
https://doi.org/10.1016/S0924-7963(03)00070-8, 2003.
Justić, D., Bierman Jr., V. J., Scavia, D., and Hetland, R. D.:
Forecasting Gulf's Hypoxia: The Next 50 Years? Forecasting Gulf's Hypoxia:
The Next 50 Years?, Estuar. Coasts, 30, 791–801,
https://doi.org/10.1007/BF02841334, 2007.
Katsavounidis, I., Kuo, C. C. J., and Zhang, Z.: A New Initialization
Technique for Generalized Lloyd Iteration, IEEE Signal Proc. Lett., 1,
144–146, https://doi.org/10.1109/97.329844, 1994.
Kemp, W. M., Boynton, W. R., Adolf, J. E., Boesch, D. F., Boicourt, W. C.,
Brush, G., Cornwell, J. C., Fisher, T. R., Glibert, P. M., Hagy, J. D.,
Harding, L. W., Houde, E. D., Kimmel, D. G., Miller, W. D., Newell, R. I.
E., Roman, M. R., Smith, E. M., and Stevenson, J. C.: Eutrophication of
Chesapeake Bay: Historical trends and ecological interactions, Mar. Ecol.-Prog. Ser., 303, 1–29, https://doi.org/10.3354/meps303001, 2005.
Lachkar, Z., Lévy, M., and Smith, K. S.: Strong Intensification of the
Arabian Sea Oxygen Minimum Zone in Response to Arabian Gulf Warming,
Geophys. Res. Lett., 46, 5420–5429,
https://doi.org/10.1029/2018GL081631, 2019.
Lajaunie-Salla, K., Sottolichio, A., Schmidt, S., Litrico, X., Binet, G.,
and Abril, G.: Future intensification of summer hypoxia in the tidal
Garonne River (SW France) simulated by a coupled hydro
sedimentary-biogeochemical model, Environ. Sci. Pollut. R., 25, 31957–31970, https://doi.org/10.1007/s11356-018-3035-6, 2018.
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.
Lee, M., Shevliakova, E., Malyshev, S., Milly, P. C. D., and Jaffé,
Peter, R.: Climate variability and extremes, interacting with nitrogen
storage, amplify eutrophication risk, Geophys. Res. Lett., 43, 7520–7528,
https://doi.org/10.1002/2016GL069254, 2016.
Lehrter, J. C., Ko, D. S., Lowe, L. L., and Penta, B.: Predicted Effects of
Climate Change on Northern Gulf of Mexico Hypoxia, in: Modeling Coastal Hypoxia:
Numerical Simulations of Patterns, edited by: Justić, D.,
Rose, K. A., Hetland, R. D., and Fennel, K., Controls and Effects of Dissolved Oxygen
Dynamics, 173–214, Springer, https://doi.org/10.1007/978-3-319-54571-4_8, 2017.
Lomas, M. W., Glibert, P. M., Shiah, F. K., and Smith, E. M.: Microbial
processes and temperature in Chesapeake Bay: Current relationships and
potential impacts of regional warming, Glob. Change Biol., 8, 51–70,
https://doi.org/10.1046/j.1365-2486.2002.00454.x, 2002.
MACAv2-METDATA: Climate data for RPA 2020 Assessment: MACAv2 (METDATA) historical modeled (1950–2005) and future (2006–2099) projections for the conterminous United States at the 1/24 degree grid scale, https://data.nal.usda.gov/dataset/climate-data-rpa-2020-assessment-macav2-metdata-historical-modeled-1950-2005-and-future-2006-2099-projections-conterminous-united-states-124-degree-grid-scale,
last access: 25 April 2018.
Madakumbura, G. D., Goldenson, N., and Hall, A.: Over Global Land Areas
Seen in Multiple Observational Datasets, Nat. Commun., 12, 3944,
https://doi.org/10.1038/s41467-021-24262-x, 2021.
Mason, C. A. and Soroka, A. M.: Nitrogen, phosphorus, and suspended-sediment
loads and trends measured at the Chesapeake Bay River Input Monitoring
stations: Water years 1985–2021, U.S. Geological Survey data release [data set],
https://doi.org/10.5066/P90CZJ1Y, 2022.
Mastrandrea, M. D., Field, C. B., Stocker, T. F., Edenhofer O., Ebi, K. L.,
Frame, D. J., Held, H., Kriegler, E., Mach, K. J., Matschoss, P. R., Plattner,
G.-K., Yohe, G. W., and Zwiers, F. W.: Guidance Note for Lead Authors of the
IPCC Fifth Assessment Report on Consistent Treatment of Uncertainties.
Intergovernmental Panel on Climate Change (IPCC), https://www.ipcc.ch/site/assets/uploads/2018/05/uncertainty-guidance-note.pdf (last access: 25 September 2022), 2010.
Meier, H. E. M., Andersson, H. C., Eilola, K., Gustafsson, B. G., Kuznetsov,
I., Mller-Karulis, B., Neumann, T., and Savchuk, O. P.: Hypoxia in future
climates: A model ensemble study for the Baltic Sea, Geophys. Res. Lett.,
38, 1–6, https://doi.org/10.1029/2011GL049929, 2011a.
Meier, H. E. M., Eilola, K., and Almroth, E.: Climate-related changes in
marine ecosystems simulated with a 3-dimensional coupled
physical-biogeochemical model of the Baltic Sea, Clim. Res., 48,
31–55,
https://doi.org/10.3354/cr00968, 2011b.
Meier, H. E. M., Hordoir, R., Andersson, H. C., Dieterich, C., Eilola, K., Gustafsson, B. G., Höglund, A., and Schimanke, S.: Modeling the combined impact of changing climate and changing nutrient loads on the Baltic Sea environment in an ensemble of transient simulations for 1961–2099, Clim. Dynam., 39, 2421–2441, https://doi.org/10.1007/s00382-012-1339-7, 2012.
Meier, H. E. M., Edman, M., Eilola, K., Placke, M., Neumann, T., Andersson,
H. C., Brunnabend, S. E., Dieterich, C., Frauen, C., Friedland, R.,
Gröger, M., Gustafsson, B. G., Gustafsson, E., Isaev, A., Kniebusch, M.,
Kuznetsov, I., Müller-Karulis, B., Naumann, M., Omstedt, A.,
Ryabchenko, V., Saraiva, S., and Savchuk, O. P.: Assessment of uncertainties in scenario
simulations of biogeochemical cycles in the Baltic Sea, Front. Mar. Sci., 6, 46,
https://doi.org/10.3389/fmars.2019.00046, 2019.
Meier, H. E. M., Dieterich, C., and Gröger, M.: Natural variability is
a large source of uncertainty in future projections of hypoxia in the Baltic
Sea, Commun. Earth Environ., 2, 50, https://doi.org/10.1038/s43247-021-00115-9, 2021.
Meier, H. E. M., Dieterich, C., Gröger, M., Dutheil, C., Börgel, F., Safonova, K., Christensen, O. B., and Kjellström, E.: Oceanographic regional climate projections for the Baltic Sea until 2100, Earth Syst. Dynam., 13, 159–199, https://doi.org/10.5194/esd-13-159-2022, 2022.
Meire, L., Soetaert, K. E. R., and Meysman, F. J. R.: Impact of global change on coastal oxygen dynamics and risk of hypoxia, Biogeosciences, 10, 2633–2653, https://doi.org/10.5194/bg-10-2633-2013, 2013.
Milly, P. C. D. and Dunne, K. A.: On the hydrologic adjustment of
climate-model projections: The potential pitfall of potential
evapotranspiration, Earth Interact., 15, 1–14,
https://doi.org/10.1175/2010EI363.1, 2011.
Muhling, B. A., Gaitán, C. F., Stock, C. A., Saba, V. S., Tommasi, D.,
and Dixon, K. W.: Potential Salinity and Temperature Futures for the
Chesapeake Bay Using a Statistical Downscaling Spatial Disaggregation
Framework, Estuar. Coasts, 41, 349–372,
https://doi.org/10.1007/s12237-017-0280-8, 2018.
Murphy, R. R., Keisman, J., Harcum, J., Karrh, R. R., Lane, M., Perry, E.
S., and Zhang, Q.: Nutrient Improvements in Chesapeake Bay: Direct Effect
of Load Reductions and Implications for Coastal Management, Environ. Sci.
Technol., 56, 260–270, https://doi.org/10.1021/acs.est.1c05388, 2022.
Najjar, R. G., Pyke, C. R., Adams, M. B., Breitburg, D., Hershner, C., Kemp,
M., Howarth, R., Mulholland, M. R., Paolisso, M., Secor, D., Sellner, K.,
Wardrop, D., and Wood, R.: Potential climate-change impacts on the
Chesapeake Bay, Estuar. Coast. Shelf S., 86, 1–20,
https://doi.org/10.1016/j.ecss.2009.09.026, 2010.
Nash, J. E. and Sutcliffe, J. V.: River Flow Forecasting through
Conceptual Models Part I – A Discussion of Principles*, J. Hydrol., 10,
282–290, 1970.
Neumann, T., Eilola, K., Gustafsson, B., Müller-Karulis, B., Kuznetsov,
I., Meier, H. E. M., and Savchuk, O. P.: Extremes of temperature, oxygen
and blooms in the baltic sea in a changing climate, Ambio, 41, 574–585,
https://doi.org/10.1007/s13280-012-0321-2, 2012.
Ni, W., Li, M., Ross, A. C., and Najjar, R. G.: Large Projected Decline in
Dissolved Oxygen in a Eutrophic Estuary Due to Climate Change, J. Geophys.
Res.-Ocean., 124, 8271–8289, https://doi.org/10.1029/2019JC015274,
2019.
Northrop, P. J. and Chandler, R. E.: Quantifying sources of uncertainty in
projections of future climate, J. Climate, 27, 8793–8808,
https://doi.org/10.1175/JCLI-D-14-00265.1, 2014.
Officer, C. B., Biggs, R. B., Taft, J. L., Cronin, L. E., Tyler, M. A., and
Boynton, W. R.: Chesapeake Bay anoxia: Origin, development, and
significance, Science, 223, 22–27,
https://doi.org/10.1126/science.223.4631.22, 1984.
Ohn, I., Kim, S., Seo, S. B., Kim, Y. O., and Kim, Y.: Model-wise
uncertainty decomposition in multi-model ensemble hydrological projections,
Stoch. Env. Res. Risk A., 35, 2549–2565,
https://doi.org/10.1007/s00477-021-02039-4, 2021.
Olson, M.: Guide to Using Chesapeake Bay Program Water Quality Monitoring
Data, edited by: Mallonee, M. and Ley, M. E., Annapolis, MD, Chesapeake Bay
Program, 2012.
Pan, S., Bian, Z., Tian, H., Yao, Y., Najjar, R. G., Friedrichs, M. A. M.,
Hofmann, E. E., Xu, R., and Zhang, B.: Impacts of Multiple Environmental
Changes on Long-Term Nitrogen Loading From the Chesapeake Bay Watershed, J.
Geophys. Res.-Biogeo., 126, e2020JG005826, https://doi.org/10.1029/2020JG005826,
2021.
Pawlowicz, R.: M_Map: A mapping package for MATLAB, version
1.4m [Computer software], https://www.eoas.ubc.ca/~rich/map.html (last access: 1 October 2022), 2020.
Peterson, E. L.: Benthic shear stress and sediment condition, Aquacult. Eng.,
21, 85–111, https://doi.org/10.1016/S0144-8609(99)00025-4, 1999.
Pihlainen, S., Zandersen, M., Hyytiäinen, K., Andersen, H. E.,
Bartosova, A., Gustafsson, B., Jabloun, M., McCrackin, M., Meier, H. E. M.,
Olesen, J. E., Saraiva, S., Swaney, D., and Thodsen, H.: Impacts of changing
society and climate on nutrient loading to the Baltic Sea, Sci. Total Environ.,
731, 138935, https://doi.org/10.1016/j.scitotenv.2020.138935, 2020.
Pozo Buil, M., Jacox, M. G., Fiechter, J., Alexander, M. A., Bograd, S. J.,
Curchitser, E. N., Edwards, C. A., Rykaczewski, R. R., and Stock, C. A.: A
Dynamically Downscaled Ensemble of Future Projections for the California
Current System, Front. Mar. Sci., 8, 1–18,
https://doi.org/10.3389/fmars.2021.612874, 2021.
Prudhomme, C., Reynard, N., and Crooks, S.: Downscaling of global climate
models for flood frequency analysis: Where are we now?, Hydrol. Process.,
16, 1137–1150, https://doi.org/10.1002/hyp.1054, 2002.
Reclamation: Downscaled CMIP3 and CMIP5 Climate and Hydrology Projections: Release of Downscaled CMIP5 Climate Projections, Comparison with preceding Information, and Summary of User Needs, prepared by the U.S. Department of the Interior, Bureau of Reclamation, Technical Services Center, Denver, Colorado, 47 pp., https://gdo-dcp.ucllnl.org/downscaled_cmip_projections/dcpInterface.html (last access: 30 July 2021), 2013.
Reum, J. C. P., Blanchard, J. L., Holsman, K. K., Aydin, K., Hollowed, A.
B., Hermann, A. J., Cheng, W., Faig, A., Haynie, A. C., and Punt, A. E.:
Ensemble Projections of Future Climate Change Impacts on the Eastern Bering
Sea Food Web Using a Multispecies Size Spectrum Model, Front. Mar. Sci., 7,
1–17, https://doi.org/10.3389/fmars.2020.00124, 2020.
Ross, A. C. and Najjar, R. G.: Evaluation of methods for selecting climate
models to simulate future hydrological change, Climatic Change, 157,
407–428, https://doi.org/10.1007/s10584-019-02512-8, 2019.
Ryabchenko, V. A., Karlin, L. N., Isaev, A. V., Vankevich, R. E., Eremina,
T. R., Molchanov, M. S., and Savchuk, O. P.: Model estimates of the
eutrophication of the Baltic Sea in the contemporary and future climate,
Oceanology, 56, 36–45, https://doi.org/10.1134/S0001437016010161, 2016.
Saraiva, S., Markus Meier, H. E., Andersson, H., Höglund, A., Dieterich,
C., Gröger, M., Hordoir, R., and Eilola, K.: Baltic Sea ecosystem
response to various nutrient load scenarios in present and future climates,
Clim. Dynam., 52, 3369–3387, https://doi.org/10.1007/s00382-018-4330-0,
2019a.
Saraiva, S., Markus Meier, H. E., Andersson, H., Höglund, A., Dieterich,
C., Gröger, M., Hordoir, R., and Eilola, K.: Uncertainties in
projections of the Baltic Sea ecosystem driven by an ensemble of global
climate models, Front. Earth Sci., 6, 1–18,
https://doi.org/10.3389/feart.2018.00244, 2019b.
Schaefer, S. C. and Alber, M.: Temperature controls a latitudinal gradient
in the proportion of watershed nitrogen exported to coastal ecosystems,
Biogeochemistry, 85, 333–346, https://doi.org/10.1007/s10533-007-9144-9,
2007.
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.
Shenk, G., Bennett, M., Boesch, D., Currey, L., Friedrichs, M., Herrmann, M.,
Hood, R., Johnson, T., Linker, L., Miller, A., and Montali, D.: Chesapeake
Bay Program Climate Change Modeling 2.0 Workshop, STAC Publication Number
21-003, Edgewater, MD, 35 pp., https://www.chesapeake.org/stac/wp-content/uploads/2021/07/Final_STAC-Report-Climate-Change_7.22.2021.pdf (last access: 15 September 2022), 2021a.
Shenk, G. W., Bhatt, G., Tian, R., Cerco, C. F., Bertani, I., and Linker, L. C.: Modeling Climate Change Effects on Chesapeake Water Quality Standards
and Development of 2025 Planning Targets to Address Climate Change, CBPO
Publication Number 328-21, Annapolis, MD, 145 pp., 2021b.
Siedlecki, S. A., Pilcher, D., Howard, E. M., Deutsch, C., MacCready, P., Norton, E. L., Frenzel, H., Newton, J., Feely, R. A., Alin, S. R., and Klinger, T.: Coastal processes modify projections of some climate-driven stressors in the California Current System, Biogeosciences, 18, 2871–2890, https://doi.org/10.5194/bg-18-2871-2021, 2021.
Sinha, E., Michalak, A. M., and Balaji, V.: Eutrophication will increase
during the 21st century as a result of precipitation changes, Science, 357,
6349, https://doi.org/10.1126/science.aan2409, 2017.
Springer, G. S., Dowdy, H. S., and Eaton, L. S.: Sediment budgets for two
mountainous basins affected by a catastrophic storm: Blue ridge mountains,
Virginia, Geomorphology, 37, 135–148,
https://doi.org/10.1016/S0169-555X(00)00066-0, 2001.
St-Laurent, P., Friedrichs, M. A., Li, M., and Ni, W.: Impacts of sea level rise on hypoxia in the Chesapeake Bay: A model intercomparison, Virginia Institute of Marine Science, William and Mary, https://doi.org/10.25773/42XY-JT30, 2019.
St-Laurent, P., Friedrichs, M. A. M., Najjar, R. G., Shadwick, E. H., Tian, H., and Yao, Y.: Relative impacts of global changes and regional watershed changes on the inorganic carbon balance of the Chesapeake Bay, Biogeosciences, 17, 3779–3796, https://doi.org/10.5194/bg-17-3779-2020, 2020.
Tango, P. J. and Batiuk, R. A.: Chesapeake Bay recovery and factors
affecting trends: Long-term monitoring, indicators, and insights, Reg. Stud.
Mar. Sci., 4, 12–20, https://doi.org/10.1016/j.rsma.2015.11.010, 2016.
Tebaldi, C., Arblaster, J. M., and Knutti, R.: Mapping model agreement on
future climate projections, Geophys. Res. Lett., 38, 1–5,
https://doi.org/10.1029/2011GL049863, 2011.
Testa, J. M., Murphy, R. R., Brady, D. C., and Kemp, W. M.: Nutrient-and
climate-induced shifts in the phenology of linked biogeochemical cycles in a
temperate estuary, Front. Mar. Sci., 5, 114,
https://doi.org/10.3389/fmars.2018.00114, 2018.
Testa, J. M., Basenback, N., Shen, C., Cole, K., Moore, A., Hodgkins, C.,
and Brady, D. C.: Modeling Impacts of Nutrient Loading, Warming, and
Boundary Exchanges on Hypoxia and Metabolism in a Shallow Estuarine
Ecosystem, J. Am. Water Resour. As., 58, 876–897,
https://doi.org/10.1111/1752-1688.12912, 2021.
Tian, R., Cerco, C. F., Bhatt, G., Linker, L. C., and Shenk, G. W.:
Mechanisms Controlling Climate Warming Impact on the Occurrence of Hypoxia
in Chesapeake Bay, J. Am. Water Resour. As., 1–21,
https://doi.org/10.1111/1752-1688.12907, 2021.
USEPA (U.S. Environmental Protection Agency): Chesapeake Bay Total Maximum
Daily Load for Nitrogen, Phosphorus and Sediment, Annapolis, MD, U.S.
Environmental Protection Agency Chesapeake Bay Program Office, http://www.epa.gov/ reg3wapd/tmdl/ChesapeakeBay/tmdlexec.html (last access: 20 September 2022), 2010.
U.S. Geological Survey: USGS water data for the Nation: U.S.
Geological Survey National Water Information System database [data set], https://doi.org/10.5066/F7P55KJN, 2022.
Vetter, T., Reinhardt, J., Flörke, M., van Griensven, A., Hattermann,
F., Huang, S., Koch, H., Pechlivanidis, I. G., Plötner, S., Seidou, O.,
Su, B., Vervoort, R. W., and Krysanova, V.: Evaluation of sources of
uncertainty in projected hydrological changes under climate change in 12
large-scale river basins, Climatic Change, 141, 419–433,
https://doi.org/10.1007/s10584-016-1794-y, 2017.
Wade, A. J., Skeffington, R. A., Couture, R.-M., Erlandsson Lampa, M.,
Groot, S., Halliday, S. J., Harezlak, V., Hejzlar, J., Jackson-Blake, L. A.,
Lepistö, A., Papastergiadou, E., Riera, J. L., Rankinen, K.,
Shahgedanova, M., Trolle, D., Whitehead, P. G., Psaltopoulos, D., and
Skuras, D.: Land Use Change to Reduce Freshwater Nitrogen and Phosphorus
will Be Effective Even with Projected Climate Change, Water, 14, 829,
https://doi.org/10.3390/w14050829, 2022.
Wagena, M. B., Collick, A. S., Ross, A. C., Najjar, R. G., Rau, B.,
Sommerlot, A. R., Fuka, D. R., Kleinman, P. J. A., and Easton, Z. M.:
Impact of climate change and climate anomalies on hydrologic and
biogeochemical processes in an agricultural catchment of the Chesapeake Bay
watershed, USA, Sci. Total Environ., 637–638, 1443–1454,
https://doi.org/10.1016/j.scitotenv.2018.05.116, 2018.
Wåhlström, I., Höglund, A., Almroth-Rosell, E., MacKenzie, B.
R., Gröger, M., Eilola, K., Plikshs, M., and Andersson, H. C.: Combined
climate change and nutrient load impacts on future habitats and
eutrophication indicators in a eutrophic coastal sea, Limnol. Oceanogr.,
1–18, https://doi.org/10.1002/lno.11446, 2020.
Wakelin, S. L., Artioli, Y., Holt, J. T., Butenschön, M., and
Blackford, J.: Controls on near-bed oxygen concentration on the Northwest
European Continental Shelf under a potential future climate scenario, Prog.
Oceanogr., 93, https://doi.org/10.1016/j.pocean.2020.102400, 2020.
Wang, H. M., Chen, J., Xu, C. Y., Zhang, J., and Chen, H.: A Framework to
Quantify the Uncertainty Contribution of GCMs Over Multiple Sources in
Hydrological Impacts of Climate Change, Earth's Futur., 8, e2020EF001602,
https://doi.org/10.1029/2020EF001602, 2020.
Wang, P., Linker, L., Wang, H., Bhatt, G., Yactayo, G., Hinson, K. E., and
Tian, R.: Assessing water quality of the Chesapeake Bay by the impact of sea
level rise and warming, IOP C. Ser. Earth Env., 82, 012001, https://doi.org/10.1088/1755-1315/82/1/012001, 2017.
Whitney, M. M.: Observed and projected global warming pressure on coastal hypoxia, Biogeosciences, 19, 4479–4497, https://doi.org/10.5194/bg-19-4479-2022, 2022.
Whitney, M. M. and Vlahos, P.: Reducing Hypoxia in an Urban Estuary
despite Climate Warming, Environ. Sci. Technol., 55, 941–951,
https://doi.org/10.1021/acs.est.0c03964, 2021.
Wolkovich, E. M., Cook, B. I., Allen, J. M., Crimmins, T. M., Betancourt, J.
L., Travers, S. E., Pau, S., Regetz, J., Davies, T. J., Kraft, N. J. B.,
Ault, T. R., Bolmgren, K., Mazer, S. J., McCabe, G. J., McGill, B. J.,
Parmesan, C., Salamin, N., Schwartz, M. D., and Cleland, E. E.: Warming
experiments underpredict plant phenological responses to climate change,
Nature, 485, 494–497, https://doi.org/10.1038/nature11014, 2012.
Wood, A. W., Leung, L. R., Sridhar, V., and Lettenmaier, D. P.: Hydrologic
implications of dynamical and statistical approaches to downscaling climate
model outputs, Climatic Change, 62, 189–216,
https://doi.org/10.1023/B:CLIM.0000013685.99609.9e, 2004.
Xu, J., Long, W., Wiggert, J. D., Lanerolle, L. W. J., Brown, C. W.,
Murtugudde, R., and Hood, R. R.: Climate Forcing and Salinity Variability in
Chesapeake Bay, USA, Estuar. Coasts, 35, 237–261,
https://doi.org/10.1007/s12237-011-9423-5, 2011.
Yang, Q., Tian, H., Friedrichs, M. A. M., Liu, M., Li, X., and Yang, J.:
Hydrological responses to climate and land-use changes along the north
american east coast: A 110-Year historical reconstruction, J. Am. Water
Resour. As., 51, 47–67, https://doi.org/10.1111/jawr.12232, 2015.
Yang, X., Wang, X., Cai, Z., and Cao, W.: Detecting spatiotemporal
variations of maximum rainfall intensities at various time intervals across
Virginia in the past half century, Atmos. Res., 255, 105534,
https://doi.org/10.1016/j.atmosres.2021.105534, 2021.
Yao, Y., Tian, H., Pan, S., Najjar, R. G., Friedrichs, M. A. M., Bian, Z.,
Li, H. Y., and Hofmann, E. E.: Riverine Carbon Cycling Over the Past
Century in the Mid-Atlantic Region of the United States, J. Geophys. Res.-Biogeo., 126, e2020JG005968, https://doi.org/10.1029/2020JG005968, 2021.
Yau, Y. Y., Baker, D. M., and Thibodeau, B.: Quantifying the Impact of
Anthropogenic Atmospheric Nitrogen Deposition on the Generation of Hypoxia
under Future Emission Scenarios in Chinese Coastal Waters, Environ. Sci.
Technol., 54, 3920–3928, https://doi.org/10.1021/acs.est.0c00706, 2020.
Yip, S., Ferro, C. A. T., Stephenson, D. B., and Hawkins, E.: A Simple,
coherent framework for partitioning uncertainty in climate predictions, J.
Climate, 24, 4634–4643, https://doi.org/10.1175/2011JCLI4085.1, 2011.
Zahran, A. R., Zhang, Q., Tango, P., and Smith, E. P.: A water quality
barometer for Chesapeake Bay: Assessing spatial and temporal patterns using
long-term monitoring data, Ecol. Indic., 140, 109022,
https://doi.org/10.1016/j.ecolind.2022.109022, 2022.
Zhang, Q., Murphy, R. R., Tian, R., Forsyth, M. K., Trentacoste, E. M.,
Keisman, J., and Tango, P. J.: Chesapeake Bay's water quality condition has
been recovering: Insights from a multimetric indicator assessment of thirty
years of tidal monitoring data, Sci. Total Environ., 637–638, 1617–1625,
https://doi.org/10.1016/j.scitotenv.2018.05.025, 2018.
Zhang, W., Moriarty, J. M., Wu, H., and Feng, Y.: Response of bottom
hypoxia off the Changjiang River Estuary to multiple factors: A numerical
study, Ocean Model., 159, 101751, https://doi.org/10.1016/j.ocemod.2021.101751, 2021.
Zhang, W., Dunne, J. P., Wu, H., and Zhou, F.: Regional projection of
climate warming effects on coastal seas in east China, Environ. Res. Lett.,
17, 074006, https://doi.org/10.1088/1748-9326/ac7344, 2022.
Short summary
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.
Climate impacts are essential for environmental managers to consider when implementing nutrient...
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