Articles | Volume 18, issue 19
https://doi.org/10.5194/bg-18-5513-2021
© Author(s) 2021. 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-18-5513-2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
12 Oct 2021
Research article |
| 12 Oct 2021
| 12 Oct 2021
Particulate organic carbon dynamics in the Gulf of Lion shelf (NW Mediterranean) using a coupled hydrodynamic–biogeochemical model
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, 14
Avenue Edouard Belin, 31400 Toulouse, France
Caroline Ulses
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, 14
Avenue Edouard Belin, 31400 Toulouse, France
LEGOS, Université de Toulouse, CNES, CNRS, IRD, UPS, 14 Avenue Edouard
Belin, 31400 Toulouse, France
Claude Estournel
Laboratoire d'Aérologie, Université de Toulouse, CNRS, UPS, 14
Avenue Edouard Belin, 31400 Toulouse, France
LEGOS, Université de Toulouse, CNES, CNRS, IRD, UPS, 14 Avenue Edouard
Belin, 31400 Toulouse, France
Patrick Marsaleix
LEGOS, Université de Toulouse, CNES, CNRS, IRD, UPS, 14 Avenue Edouard
Belin, 31400 Toulouse, France
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Claude Estournel, Tristan Estaque, Caroline Ulses, Quentin-Boris Barral, and Patrick Marsaleix
EGUsphere, https://doi.org/10.5194/egusphere-2024-3880, https://doi.org/10.5194/egusphere-2024-3880, 2024
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During the summer of 2022 in the eastern Gulf of Lion (NW Mediterranean), exceptionally warm temperatures were observed down to depths of 30 m, along with massive mortality of benthic species. It has been shown that these deep marine heatwaves are linked to south-easterly wind episodes, which induce deep plunges of surface water overheated by the atmospheric heatwave. These events are rare in summer, but their impact on ecosystems is dramatic and will only increase with climate change.
Adrien Garinet, Marine Herrmann, Patrick Marsaleix, and Juliette Pénicaud
Geosci. Model Dev., 17, 6967–6986, https://doi.org/10.5194/gmd-17-6967-2024, https://doi.org/10.5194/gmd-17-6967-2024, 2024
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Mixing is a crucial aspect of the ocean, but its accurate representation in computer simulations is made challenging by errors that result in unwanted mixing, compromising simulation realism. Here we illustrate the spurious effect that tides can have on simulations of south-east Asia. Although they play an important role in determining the state of the ocean, they can increase numerical errors and make simulation outputs less realistic. We also provide insights into how to reduce these errors.
Ngoc B. Trinh, Marine Herrmann, Caroline Ulses, Patrick Marsaleix, Thomas Duhaut, Thai To Duy, Claude Estournel, and R. Kipp Shearman
Geosci. Model Dev., 17, 1831–1867, https://doi.org/10.5194/gmd-17-1831-2024, https://doi.org/10.5194/gmd-17-1831-2024, 2024
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A high-resolution model was built to study the South China Sea (SCS) water, heat, and salt budgets. Model performance is demonstrated by comparison with observations and simulations. Important discards are observed if calculating offline, instead of online, lateral inflows and outflows of water, heat, and salt. The SCS mainly receives water from the Luzon Strait and releases it through the Mindoro, Taiwan, and Karimata straits. SCS surface interocean water exchanges are driven by monsoon winds.
Caroline Ulses, Claude Estournel, Patrick Marsaleix, Karline Soetaert, Marine Fourrier, Laurent Coppola, Dominique Lefèvre, Franck Touratier, Catherine Goyet, Véronique Guglielmi, Fayçal Kessouri, Pierre Testor, and Xavier Durrieu de Madron
Biogeosciences, 20, 4683–4710, https://doi.org/10.5194/bg-20-4683-2023, https://doi.org/10.5194/bg-20-4683-2023, 2023
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Deep convection plays a key role in the circulation, thermodynamics, and biogeochemical cycles in the Mediterranean Sea, considered to be a hotspot of biodiversity and climate change. In this study, we investigate the seasonal and annual budget of dissolved inorganic carbon in the deep-convection area of the northwestern Mediterranean Sea.
Joelle Habib, Caroline Ulses, Claude Estournel, Milad Fakhri, Patrick Marsaleix, Mireille Pujo-Pay, Marine Fourrier, Laurent Coppola, Alexandre Mignot, Laurent Mortier, and Pascal Conan
Biogeosciences, 20, 3203–3228, https://doi.org/10.5194/bg-20-3203-2023, https://doi.org/10.5194/bg-20-3203-2023, 2023
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The Rhodes Gyre, eastern Mediterranean Sea, is the main Levantine Intermediate Water formation site. In this study, we use a 3D physical–biogeochemical model to investigate the seasonal and interannual variability of organic carbon dynamics in the gyre. Our results show its autotrophic nature and its high interannual variability, with enhanced primary production, downward exports, and onward exports to the surrounding regions during years marked by intense heat losses and deep mixed layers.
Alice Carret, Florence Birol, Claude Estournel, and Bruno Zakardjian
Ocean Sci., 19, 903–921, https://doi.org/10.5194/os-19-903-2023, https://doi.org/10.5194/os-19-903-2023, 2023
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This study presents a methodology to investigate the ability of satellite altimetry to observe a coastal current, the Northern Current, in the NW Mediterannean Sea. We use a high-resolution regional model, validated with HF radars and in situ data. The model is used as a reference and compared to three different missions (Jason 2, SARAL and Sentinel-3), studying both the surface velocity and the sea surface height signature of the current. The performance of the three missions was also compared.
Marine Herrmann, Thai To Duy, and Claude Estournel
Ocean Sci., 19, 453–467, https://doi.org/10.5194/os-19-453-2023, https://doi.org/10.5194/os-19-453-2023, 2023
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The South Vietnam upwelling develops in summer along and off the Vietnamese coast. It brings cold and nutrient-rich waters to the surface, allowing photosynthesis essential to marine ecosystems and fishing resources. We show here that its daily variations are mainly due to the wind, thus predictable, in the southern shelf and coastal regions. However, they are more chaotic in the offshore area, and especially in the northern area, due to the influence of eddies of a highly chaotic nature.
Thai To Duy, Marine Herrmann, Claude Estournel, Patrick Marsaleix, Thomas Duhaut, Long Bui Hong, and Ngoc Trinh Bich
Ocean Sci., 18, 1131–1161, https://doi.org/10.5194/os-18-1131-2022, https://doi.org/10.5194/os-18-1131-2022, 2022
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The South Vietnam Upwelling develops in the coastal and offshore regions of the southwestern South China Sea under the influence of summer monsoon winds. Cold, nutrient-rich waters rise to the surface, where photosynthesis occurs and is essential for fishing activity. We have developed a very high-resolution model to better understand the factors that drive the variability of this upwelling at different scales: daily chronology to summer mean of wind and mesoscale to regional circulation.
Caroline Ulses, Claude Estournel, Marine Fourrier, Laurent Coppola, Fayçal Kessouri, Dominique Lefèvre, and Patrick Marsaleix
Biogeosciences, 18, 937–960, https://doi.org/10.5194/bg-18-937-2021, https://doi.org/10.5194/bg-18-937-2021, 2021
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We analyse the seasonal cycle of O2 and estimate an annual O2 budget in the north-western Mediterranean deep-convection region, using a numerical model. We show that this region acts as a large sink of atmospheric O2 and as a major source of O2 for the western Mediterranean Sea. The decrease in the deep convection intensity predicted in recent projections may have important consequences on the overall uptake of O2 in the Mediterranean Sea and on the O2 exchanges with the Atlantic Ocean.
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Long-term pH variation in coastal waters along the Korean Peninsula was assessed for the first time, and it exhibited no significant pH change over an 11-year period. This contrasts with the ongoing pH decline in open oceans and other coastal areas. Analysis of environmental data showed that pH is mainly controlled by dissolved oxygen in bottom waters. This suggests that ocean warming could cause a pH decline in Korean coastal waters, affecting many fish and seaweed aquaculture operations.
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Biogeosciences, 21, 4975–5004, https://doi.org/10.5194/bg-21-4975-2024, https://doi.org/10.5194/bg-21-4975-2024, 2024
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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.
Menghong Dong, Xinyu Guo, Takuya Matsuura, Taichi Tebakari, and Jing Zhang
EGUsphere, https://doi.org/10.5194/egusphere-2024-2581, https://doi.org/10.5194/egusphere-2024-2581, 2024
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Submarine groundwater discharge (SGD), a common coastal hydrological process that involves submarine inflow of groundwater into the sea, is associated with a large nutrient load. To clarify the distribution of SGD-derived nutrients after release at the bottom of the sea and their contribution to phytoplankton growth in the marine ecosystem, we modeled the SGD process in Toyama Bay using a specialized computer code that can distinguish SGD-derived nutrients from nutrients from other sources.
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.
Vlad A. Macovei, Louise C. V. Rewrie, Rüdiger Röttgers, and Yoana G. Voynova
EGUsphere, https://doi.org/10.5194/egusphere-2024-2643, https://doi.org/10.5194/egusphere-2024-2643, 2024
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A commercial vessel equipped with scientific instruments regularly travelled between two large macro-tidal estuaries. We found that biogeochemical variability in the outer estuaries is driven by the 14-day spring-neap tidal cycle, with strong effects on dissolved inorganic and organic carbon concentrations and distribution. Since this land-sea interface effect increases the strength of the carbon source to the atmosphere by 74 % during spring tide, it should be accounted for in regional models.
Lennart Thomas Bach, Aaron James Ferderer, Julie LaRoche, and Kai Georg Schulz
Biogeosciences, 21, 3665–3676, https://doi.org/10.5194/bg-21-3665-2024, https://doi.org/10.5194/bg-21-3665-2024, 2024
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Ocean alkalinity enhancement (OAE) is an emerging marine CO2 removal method, but its environmental effects are insufficiently understood. The OAE Pelagic Impact Intercomparison Project (OAEPIIP) provides funding for a standardized and globally replicated microcosm experiment to study the effects of OAE on plankton communities. Here, we provide a detailed manual for the OAEPIIP experiment. We expect OAEPIIP to help build scientific consensus on the effects of OAE on plankton.
Marlena Szeligowska, Déborah Benkort, Anna Przyborska, Mateusz Moskalik, Bernabé Moreno, Emilia Trudnowska, and Katarzyna Błachowiak-Samołyk
Biogeosciences, 21, 3617–3639, https://doi.org/10.5194/bg-21-3617-2024, https://doi.org/10.5194/bg-21-3617-2024, 2024
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The European Arctic is experiencing rapid regional warming, causing glaciers that terminate in the sea to retreat onto land. Due to this process, the area of a well-studied fjord, Hornsund, has increased by around 100 km2 (40%) since 1976. Combining satellite and in situ data with a mathematical model, we estimated that, despite some negative consequences of glacial meltwater release, such emerging coastal waters could mitigate climate change by increasing carbon uptake and storage by sediments.
Mallory C. Ringham, Nathan Hirtle, Cody Shaw, Xi Lu, Julian Herndon, Brendan R. Carter, and Matthew D. Eisaman
Biogeosciences, 21, 3551–3570, https://doi.org/10.5194/bg-21-3551-2024, https://doi.org/10.5194/bg-21-3551-2024, 2024
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Ocean alkalinity enhancement leverages the large surface area and carbon storage capacity of the oceans to store atmospheric CO2 as dissolved bicarbonate. We monitored CO2 uptake in seawater treated with NaOH to establish operational boundaries for carbon removal experiments. Results show that CO2 equilibration occurred on the order of weeks to months, was consistent with values expected from equilibration calculations, and was limited by mineral precipitation at high pH and CaCO3 saturation.
Riel Carlo O. Ingeniero, Gesa Schulz, and Hermann W. Bange
Biogeosciences, 21, 3425–3440, https://doi.org/10.5194/bg-21-3425-2024, https://doi.org/10.5194/bg-21-3425-2024, 2024
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Our research is the first to measure dissolved NO concentrations in temperate estuarine waters, providing insights into its distribution under varying conditions and enhancing our understanding of its production processes. Dissolved NO was supersaturated in the Elbe Estuary, indicating that it is a source of atmospheric NO. The observed distribution of dissolved NO most likely resulted from nitrification.
Celeste López-Abbate, John E. Garzón-Cardona, Ricardo Silva, Juan-Carlos Molinero, Laura A. Ruiz-Etcheverry, Ana M. Martínez, Azul S. Gilabert, and Rubén J. Lara
EGUsphere, https://doi.org/10.5194/egusphere-2024-1860, https://doi.org/10.5194/egusphere-2024-1860, 2024
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This study examines how microbial community structure, growth, and grazing impact the DOM pool in the Patagonian Shelf. Despite higher phytoplankton biomass, faster-growing bacteria were selectively grazed by protists leading to DOM accumulation, likely due to a reduction in DOM-consuming bacteria and the addition of egestion compounds. Experimental data showed that while bacteria remained as the primarily shapers of DOM quality, grazing pressure impacted on DOM accumulation.
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.
Daniel Müller, Bo Liu, Walter Geibert, Moritz Holtappels, Lasse Sander, Elda Miramontes, Heidi Taubner, Susann Henkel, Kai-Uwe Hinrichs, Denise Bethke, Ingrid Dohrmann, and Sabine Kasten
EGUsphere, https://doi.org/10.5194/egusphere-2024-1632, https://doi.org/10.5194/egusphere-2024-1632, 2024
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Coastal and shelf sediments are the most important sinks for organic carbon (OC) on Earth. We produced a new high-resolution sediment and pore-water dataset from the Helgoland Mud Area (HMA), North Sea, to determine, which depositional factors control the preservation of OC. The burial efficiency is highest in an area of high sedimentation and terrigenous OC. The HMA covers 0.09 % of the North Sea, but accounts for 0.76 % of its OC accumulation, highlighting the importance of the depocentre.
Deep S. Banerjee and Jozef Skakala
EGUsphere, https://doi.org/10.22541/essoar.171405637.76928549/v1, https://doi.org/10.22541/essoar.171405637.76928549/v1, 2024
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Nitrate is a crucial nutrient in oceans. Excess nutrients can trigger uncontrolled algae growth (eutrophication), damaging marine ecosystems. We used a machine learning tool to generate a skilled, gap-free, bi-decadal surface nitrate dataset from sparse observations. This dataset reveals areas on the North West European Shelf at risk of eutrophication, bi-decadal trends in coastal nitrate, and an impact of winter nitrate on spring phytoplankton blooms.
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.
Darren Pilcher, Jessica Cross, Natalie Monacci, Linquan Mu, Kelly Kearney, Albert Hermann, and Wei Cheng
EGUsphere, https://doi.org/10.5194/egusphere-2024-1096, https://doi.org/10.5194/egusphere-2024-1096, 2024
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The Bering Sea shelf is a highly productive marine ecosystem that is vulnerable to ocean acidification. We use a computational model to simulate the carbon cycle and acidification rates from 1970–2022. The results suggest that bottom water acidification rates are more than twice as great as surface rates. Bottom waters are also naturally more acidic, thus these waters will pass key thresholds known to negatively impact marine organisms, such as red king crab, much sooner than surface waters.
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.
Leissing Frederick, Mauricio A. Urbina, and Ruben Escribano
EGUsphere, https://doi.org/10.5194/egusphere-2024-836, https://doi.org/10.5194/egusphere-2024-836, 2024
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Evidence shows that due to global warming zooplankton inhabiting the coastal upwelling zone are exposed to increasing hypoxia affecting their physiology, metabolism, and population dynamics. The adaptive responses of zooplankton to cope with mild/severe hypoxia may depend on trade-offs with other metabolic/energy-demands, implying less energy for growth, feeding and reproduction with ecological consequences for the zooplankton populations and the marine food web.
Giovanni Galli, Sarah Wakelin, James Harle, Jason Holt, and Yuri Artioli
Biogeosciences, 21, 2143–2158, https://doi.org/10.5194/bg-21-2143-2024, https://doi.org/10.5194/bg-21-2143-2024, 2024
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This work shows that, under a high-emission scenario, oxygen concentration in deep water of parts of the North Sea and Celtic Sea can become critically low (hypoxia) towards the end of this century. The extent and frequency of hypoxia depends on the intensity of climate change projected by different climate models. This is the result of a complex combination of factors like warming, increase in stratification, changes in the currents and changes in biological processes.
Sandy E. Tenorio and Laura Farías
Biogeosciences, 21, 2029–2050, https://doi.org/10.5194/bg-21-2029-2024, https://doi.org/10.5194/bg-21-2029-2024, 2024
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Time series studies show that CH4 is highly dynamic on the coastal ocean surface and planktonic communities are linked to CH4 accumulation, as found in coastal upwelling off Chile. We have identified the crucial role of picoplankton (> 3 µm) in CH4 recycling, especially with the addition of methylated substrates (trimethylamine and methylphosphonic acid) during upwelling and non-upwelling periods. These insights improve understanding of surface ocean CH4 recycling, aiding CH4 emission estimates.
Charlotte A. J. Williams, Tom Hull, Jan Kaiser, Claire Mahaffey, Naomi Greenwood, Matthew Toberman, and Matthew R. Palmer
Biogeosciences, 21, 1961–1971, https://doi.org/10.5194/bg-21-1961-2024, https://doi.org/10.5194/bg-21-1961-2024, 2024
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Oxygen (O2) is a key indicator of ocean health. The risk of O2 loss in the productive coastal/continental slope regions is increasing. Autonomous underwater vehicles equipped with O2 optodes provide lots of data but have problems resolving strong vertical O2 changes. Here we show how to overcome this and calculate how much O2 is supplied to the low-O2 bottom waters via mixing. Bursts in mixing supply nearly all of the O2 to bottom waters in autumn, stopping them reaching ecologically low levels.
Sabine Schmidt and Ibrahima Iris Diallo
Biogeosciences, 21, 1785–1800, https://doi.org/10.5194/bg-21-1785-2024, https://doi.org/10.5194/bg-21-1785-2024, 2024
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Along the French coast facing the Bay of Biscay, the large Gironde and Loire estuaries suffer from hypoxia. This prompted a study of the small Charente estuary located between them. This work reveals a minimum oxygen zone in the Charente estuary, which extends for about 25 km. Temperature is the main factor controlling the hypoxia. This calls for the monitoring of small turbid macrotidal estuaries that are vulnerable to hypoxia, a risk expected to increase with global warming.
Simone R. Alin, Jan A. Newton, Richard A. Feely, Samantha Siedlecki, and Dana Greeley
Biogeosciences, 21, 1639–1673, https://doi.org/10.5194/bg-21-1639-2024, https://doi.org/10.5194/bg-21-1639-2024, 2024
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We provide a new multi-stressor data product that allows us to characterize the seasonality of temperature, O2, and CO2 in the southern Salish Sea and delivers insights into the impacts of major marine heatwave and precipitation anomalies on regional ocean acidification and hypoxia. We also describe the present-day frequencies of temperature, O2, and ocean acidification conditions that cross thresholds of sensitive regional species that are economically or ecologically important.
Librada Ramírez, Leonardo J. Pozzo-Pirotta, Aja Trebec, Víctor Manzanares-Vázquez, José L. Díez, Javier Arístegui, Ulf Riebesell, Stephen D. Archer, and María Segovia
EGUsphere, https://doi.org/10.5194/egusphere-2024-847, https://doi.org/10.5194/egusphere-2024-847, 2024
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We studied the potential effects of increasing ocean alkalinity on a natural plankton community in subtropical waters of the Atlantic near Gran Canaria, Spain. Alkalinity is the capacity of water to resist acidification and plankton are usually microscopic plants (phytoplankton) and animals (zooplankton), often less than 2,5 cm in length. This study suggests that increasing ocean alkalinity did not have a significant negative impact on the studied plankton community.
Pamela Linford, Iván Pérez-Santos, Paulina Montero, Patricio A. Díaz, Claudia Aracena, Elías Pinilla, Facundo Barrera, Manuel Castillo, Aida Alvera-Azcárate, Mónica Alvarado, Gabriel Soto, Cécile Pujol, Camila Schwerter, Sara Arenas-Uribe, Pilar Navarro, Guido Mancilla-Gutiérrez, Robinson Altamirano, Javiera San Martín, and Camila Soto-Riquelme
Biogeosciences, 21, 1433–1459, https://doi.org/10.5194/bg-21-1433-2024, https://doi.org/10.5194/bg-21-1433-2024, 2024
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The Patagonian fjords comprise a world region where low-oxygen water and hypoxia conditions are observed. An in situ dataset was used to quantify the mechanism involved in the presence of these conditions in northern Patagonian fjords. Water mass analysis confirmed the contribution of Equatorial Subsurface Water in the advection of the low-oxygen water, and hypoxic conditions occurred when the community respiration rate exceeded the gross primary production.
Ting Wang, Buyun Du, Inke Forbrich, Jun Zhou, Joshua Polen, Elsie M. Sunderland, Prentiss H. Balcom, Celia Chen, and Daniel Obrist
Biogeosciences, 21, 1461–1476, https://doi.org/10.5194/bg-21-1461-2024, https://doi.org/10.5194/bg-21-1461-2024, 2024
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The strong seasonal increases of Hg in aboveground biomass during the growing season and the lack of changes observed after senescence in this salt marsh ecosystem suggest physiologically controlled Hg uptake pathways. The Hg sources found in marsh aboveground tissues originate from a mix of sources, unlike terrestrial ecosystems, where atmospheric GEM is the main source. Belowground plant tissues mostly take up Hg from soils. Overall, the salt marsh currently serves as a small net Hg sink.
Eleanor Simpson, Debby Ianson, Karen E. Kohfeld, Ana C. Franco, Paul A. Covert, Marty Davelaar, and Yves Perreault
Biogeosciences, 21, 1323–1353, https://doi.org/10.5194/bg-21-1323-2024, https://doi.org/10.5194/bg-21-1323-2024, 2024
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Shellfish aquaculture operates in nearshore areas where data on ocean acidification parameters are limited. We show daily and seasonal variability in pH and saturation states of calcium carbonate at nearshore aquaculture sites in British Columbia, Canada, and determine the contributing drivers of this variability. We find that nearshore locations have greater variability than open waters and that the uptake of carbon by phytoplankton is the major driver of pH and saturation state variability.
S. Alejandra Castillo Cieza, Rachel H. R. Stanley, Pierre Marrec, Diana N. Fontaine, E. Taylor Crockford, Dennis J. McGillicuddy Jr., Arshia Mehta, Susanne Menden-Deuer, Emily E. Peacock, Tatiana A. Rynearson, Zoe O. Sandwith, Weifeng Zhang, and Heidi M. Sosik
Biogeosciences, 21, 1235–1257, https://doi.org/10.5194/bg-21-1235-2024, https://doi.org/10.5194/bg-21-1235-2024, 2024
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The coastal ocean in the northeastern USA provides many services, including fisheries and habitats for threatened species. In summer 2019, a bloom occurred of a large unusual phytoplankton, the diatom Hemiaulus, with nitrogen-fixing symbionts. This led to vast changes in productivity and grazing rates in the ecosystem. This work shows that the emergence of one species can have profound effects on ecosystem function. Such changes may become more prevalent as the ocean warms due to climate change.
Claudine Hauri, Brita Irving, Sam Dupont, Rémi Pagés, Donna D. W. Hauser, and Seth L. Danielson
Biogeosciences, 21, 1135–1159, https://doi.org/10.5194/bg-21-1135-2024, https://doi.org/10.5194/bg-21-1135-2024, 2024
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Arctic marine ecosystems are highly susceptible to impacts of climate change and ocean acidification. We present pH and pCO2 time series (2016–2020) from the Chukchi Ecosystem Observatory and analyze the drivers of the current conditions to get a better understanding of how climate change and ocean acidification could affect the ecological niches of organisms.
William Hiles, Lucy C. Miller, Craig Smeaton, and William E. N. Austin
Biogeosciences, 21, 929–948, https://doi.org/10.5194/bg-21-929-2024, https://doi.org/10.5194/bg-21-929-2024, 2024
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Saltmarsh soils may help to limit the rate of climate change by storing carbon. To understand their impacts, they must be accurately mapped. We use drone data to estimate the size of three saltmarshes in NE Scotland. We find that drone imagery, combined with tidal data, can reliably inform our understanding of saltmarsh size. When compared with previous work using vegetation communities, we find that our most reliable new estimates of stored carbon are 15–20 % smaller than previously estimated.
De'Marcus Robinson, Anh L. D. Pham, David J. Yousavich, Felix Janssen, Frank Wenzhöfer, Eleanor C. Arrington, Kelsey M. Gosselin, Marco Sandoval-Belmar, Matthew Mar, David L. Valentine, Daniele Bianchi, and Tina Treude
Biogeosciences, 21, 773–788, https://doi.org/10.5194/bg-21-773-2024, https://doi.org/10.5194/bg-21-773-2024, 2024
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The present study suggests that high release of ferrous iron from the seafloor of the oxygen-deficient Santa Barabara Basin (California) supports surface primary productivity, creating positive feedback on seafloor iron release by enhancing low-oxygen conditions in the basin.
David J. Yousavich, De'Marcus Robinson, Xuefeng Peng, Sebastian J. E. Krause, Frank Wenzhöfer, Felix Janssen, Na Liu, Jonathan Tarn, Franklin Kinnaman, David L. Valentine, and Tina Treude
Biogeosciences, 21, 789–809, https://doi.org/10.5194/bg-21-789-2024, https://doi.org/10.5194/bg-21-789-2024, 2024
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Declining oxygen (O2) concentrations in coastal oceans can threaten people’s ways of life and food supplies. Here, we investigate how mats of bacteria that proliferate on the seafloor of the Santa Barbara Basin sustain and potentially worsen these O2 depletion events through their unique chemoautotrophic metabolism. Our study shows how changes in seafloor microbiology and geochemistry brought on by declining O2 concentrations can help these mats grow as well as how that growth affects the basin.
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.
Cited articles
Accornero, A., Picon, P., De Bovée, F., Charrière, B., and Buscail,
R.: Organic carbon budget at the sediment-water interface on the Gulf of
Lions continental margin, Cont. Shelf Res., 23, 79–92,
https://doi.org/10.1016/S0278-4343(02)00168-1, 2003.
Alberola, C., Millot, C., and Font, J.: On the seasonal and mesoscale
variabilities of the Northern Current during the PRIMO-0 experiment in the
western Mediterranean-sea, Oceanol. Acta, 18, 163–192, 1995.
Alekseenko, E., Raybaud V., Espinasse B., Carlotti F., Queguiner B.,
Thouvenin B., Garreau P., and Baklouti M.: Seasonal dynamics and stoichiometry
of the planktonic community in the NW Mediterranean Sea: a 3D modeling
approach, Ocean Dynam., 64, 179–207, https://doi.org/10.1007/s10236-013-0669-2, 2014.
Auger, P. A., Diaz, F., Ulses, C., Estournel, C., Neveux, J., Joux, F., Pujo-Pay, M., and Naudin, J. J.: Functioning of the planktonic ecosystem on the Gulf of Lions shelf (NW Mediterranean) during spring and its impact on the carbon deposition: a field data and 3-D modelling combined approach, Biogeosciences, 8, 3231–3261, https://doi.org/10.5194/bg-8-3231-2011, 2011.
Bauer, J. E. and Druffel, E. R. M.: Oceans margins as a significant source of
organic matter to the deep open ocean, Nature, 392, 482–485,
https://doi.org/10.1038/33122, 1998.
Behrenfeld, M. J., Westberry, T. K., Boss, E. S., O'Malley, R. T., Siegel, D. A., Wiggert, J. D., Franz, B. A., McClain, C. R., Feldman, G. C., Doney, S. C., Moore, J. K., Dall'Olmo, G., Milligan, A. J., Lima, I., and Mahowald, N.: Satellite-detected fluorescence reveals global physiology of ocean phytoplankton, Biogeosciences, 6, 779–794, https://doi.org/10.5194/bg-6-779-2009, 2009.
Bentsen, M., Evensen, G., Drange, H., and Jenkins, A. D.: Coordinate
transformation on a sphere using conformal mapping, Mon. Weather Rev.,
127, 2733–2740, https://doi.org/10.1175/1520-0493(1999)127<2733:CTOASU>2.0.CO;2, 1999.
Bosc, E., Bricaud, A., and Antoine, D.: Seasonal and interannual variability
in algal biomass and primary production in the Mediterranean Sea, as derived
from 4 years of SeaWiFS observations, Global Biogeochem. Cy., 18, 1,
https://doi.org/10.1029/2003GB002034, 2004.
Bouffard, J., Vignudelli, S., Herrmann, M., Lyard, F., Marsaleix, P., Ménard, Y.,
and Cipollini, P.: Comparison of ocean dynamics with a regional
circulation model and improved altimetry in the North-western Mediterranean,
Terrestrial, Atmos. Ocean. Sci., 19, 117–133,
https://doi.org/10.3319/TAO.2008.19.1-2.117(SA), 2008.
Bourrin, F., Many, G., Durrieu de Madron, X., Martín, J., Puig, P.,
Houpert, L., and Béguery, L.: Glider monitoring of shelf suspended
particle dynamics and transport during storm and flooding conditions, Cont.
Shelf Res., 109, 135–149, https://doi.org/10.1016/j.csr.2015.08.031, 2015.
Briton, F., Cortese, D., Duhaut, T., and Guizien, K.: High-resolution
modelling of ocean circulation can reveal retention spots important for
biodiversity conservation, Aquat. Conserv., 28, 882–893, https://doi.org/10.1002/aqc.2901, 2018.
Carret, A., Birol, F., Estournel, C., Zakardjian, B., and Testor, P.: Synergy between in situ and altimetry data to observe and study Northern Current variations (NW Mediterranean Sea), Ocean Sci., 15, 269–290, https://doi.org/10.5194/os-15-269-2019, 2019.
Campbell, R., Diaz, F., Hu, Z. Y., Doglioli, A., Petrenko, A., and Dekeyser,
I.: Nutrients and plankton spatial distributions induced by a coastal eddy in
the Gulf of Lion. Insights from a numerical model, Prog. Oceanogr.,
109, 47–69, https://doi.org/10.1016/j.pocean.2012.09.005, 2013.
Cathalot, C., Rabouille, C., Tisnérat-Laborde, N., Toussaint, F.,
Kerhervé, P., Buscail, R., and Lansard, B.: The fate of river
organic carbon in coastal areas: a study in the Rhône River delta using
multiple isotopic (δ13C, Δ14C) and organic tracers,
Geochim. Cosmochim. Ac., 118, 33–55,
https://doi.org/10.1016/j.gca.2013.05.001, 2013.
Conan, P., Pujo-Pay, M., Raimbault, P., and Leveau, M.: Variabilité
hydrologique et biologique du golfe du Lion, II. Productivité sur le
bord interne du courant, Oceanol. Ac., 21, 767–782,
https://doi.org/10.1016/S0399-1784(99)80005-X, 1998.
Cruzado, A. and Velasquez, Z. R.: Nutrients and phytoplankton in the Gulf of
Lions, northwestern Mediterranean, Cont. Shelf Res., 10, 931–942,
https://doi.org/10.1016/0278-4343(90)90068-W, 1990.
Daewel, U. and Schrum, C.: Low-frequency variability in North Sea and
Baltic Sea identified through simulations with the 3-D coupled
physical–biogeochemical model ECOSMO, Earth Syst. Dynam., 8, 801–815,
https://doi.org/10.5194/esd-8-801-2017, 2017.
Dagg, M., Benner, R., Lohrenz, S., and Lawrence, D.: Transformation of
dissolved and particulate materials on continental shelves influenced by
large rivers: plume processes, Cont. Shelf Res., 24, 833–858,
https://doi.org/10.1016/j.csr.2004.02.003, 2004.
Dagg, M. J., Bianchi, T., McKee, B., and Powell, R.: Fates of dissolved and
particulate materials from the Mississippi river immediately after discharge
into the northern Gulf of Mexico, USA, during a period of low wind stress,
Cont. Shelf Res., 28, 1443–1450, https://doi.org/10.1016/j.csr.2006.12.009,
2008.
Darmaraki, S., Somot, S., Sevault, F., Nabat, P., Cabos Narvaez, W. D., Cavicchia, L., Djurdjevic, V., Li, L., Sannino, G., and Sein, D. V.: Future evolution of marine heatwaves in the
Mediterranean Sea, Clim. Dynam. 53, 1371–1392, https://doi.org/10.1007/s00382-019-04661-z, 2019.
Davis, R. E., Eriksen, C. C., and Jones, C. P.: Autonomous buoyancy-driven
underwater gliders, The technology and applications of autonomous underwater
vehicles, The technology and applications
of autonomous underwater vehicles, 37–58, 2002.
Diaz, F., Raimbault, P., and Conan, P.: Small-scale study of primary
productivity during spring in a Mediterranean coastal area (Gulf of Lions),
Cont. Shelf Res., 20, 975–996, 2000.
Dufau-Julliand, C., Marsaleix, P., Petrenko, A., and Dekeyser, I.:
Three-dimensional modeling of the Gulf of Lion's hydrodynamics (northwest
Mediterranean) during January 1999 (MOOGLI3 Experiment) and late winter
1999: Western Mediterranean Intermediate Water's (WIW's) formation and its
cascading over the shelf break, J. Geophys. Res.-Oceans,
109, C11, https://doi.org/10.1029/2003JC002019, 2004.
Durrieu de Madron, X., Abassi, A., Heussner, S., Monaco, A., Aloisi, J. C.,
Radakovitch, O., Giresse, P., Buscail, R., and Kerherveì, P.: Particulate
matter and organic carbon budgets for the Gulf of Lions (NW Mediterranean),
Oceanol. Ac., 23, 717–730,
https://doi.org/10.1016/S0399-1784(00)00119-5, 2000.
Durrieu de Madron, X., Denis, L., Diaz, F., Garcia, N., Guieu, C., Grenz,
C., and Ridame, C.: Nutrients and carbon budgets for the Gulf of Lion during
the Moogli cruises, Oceanol. Ac., 26, 421–433,
https://doi.org/10.1016/S0399-1784(03)00024-0, 2003.
Durrieu de Madron, X., Houpert, L., Puig, P., Sanchez-Vidal, A., Testor, P.,
Bosse, A., and Raimbault, P.: Interaction of dense shelf water cascading
and open-sea convection in the northwestern Mediterranean during winter
2012, Geophys. Res. Lett., 40, 1379–1385,
https://doi.org/10.1002/grl.50331, 2013.
Eppley, R. W.: Temperature and phytoplankton growth in the sea, Fish. Bull.,
70, 1063–1085, 1972.
Estournel, C., Kondrachoff, V., Marsaleix, P., and Vehil, R.: The plume of
the Rhone: numerical simulation and remote sensing, Cont. Shelf Res., 17,
899–924, https://doi.org/10.1016/S0278-4343(96)00064-7, 1997.
Estournel, C., Durrieu de Madron, X., Marsaleix, P., Auclair, F., Julliand,
C., and Vehil, R.: Observation and modeling of the winter coastal oceanic
circulation in the Gulf of Lion under wind conditions influenced by the
continental orography (FETCH experiment), J. Geophys. Res.-Oceans, 108, C3, https://doi.org/10.1029/2001JC000825, 2003.
Estournel, C., Auclair, F., Lux, M., Nguyen, C., and Marsaleix, P.: “Scale oriented” embedded modeling of the North-Western Mediterranean in the frame of MFSTEP, Ocean Sci., 5, 73–90, https://doi.org/10.5194/os-5-73-2009, 2009.
Estournel, C., Testor, P., Damien, P., D'Ortenzio, F., Marsaleix, P., Conan,
P., and Prieur, L.: High resolution modeling of dense water formation in the
north-western Mediterranean during winter 2012–2013: Processes and budget,
J. Geophys.-Res.-Oceans, 121, 5367–5392,
https://doi.org/10.1002/2016JC011935, 2016.
Fraysse, M., Pairaud, I., Ross, O. N., Faure, V. M., and Pinazo, C.:
Intrusion of Rhone River diluted water into the Bay of Marseille: Generation
processes and impacts on ecosystem functioning, J. Geophys.-Res.-Oceans, 119, 6535–6556, https://doi.org/10.1002/2014JC010022,
2014.
Fraysse, M., Pinazo, C., Faure, V. M., Fuchs, R., Lazzari, P., Raimbault,
P., and Pairaud, I.: Development of a 3D coupled physical-biogeochemical
model for the Marseille coastal area (NW Mediterranean Sea): what complexity
is required in the coastal zone?, PlOS ONE, 8, e80012,
https://doi.org/10.1371/journal.pone.0080012, 2013.
Gangloff, A., Verney, R., Doxaran, D., Ody, A., and Estournel, C.:
Investigating Rhône River plume (Gulf of Lions, France) dynamics using
metrics analysis from the MERIS 300 m Ocean Color archive (2002–2012), Cont.
Shelf Res., 144, 98–111, https://doi.org/10.1016/j.csr.2017.06.024, 2017.
Gao, S. and Wang, Y. P.: Changes in material fluxes from the Changjiang
River and their implications on the adjoining continental shelf ecosystem,
Cont. Shelf. Res., 28, 1490–1500,
https://doi.org/10.1016/j.csr.2007.02.010, 2008.
Gohin, F.: Annual cycles of chlorophyll-a, non-algal suspended particulate
matter, and turbidity observed from space and in-situ in coastal waters,
Ocean Sci., 7, 705–732, https://doi.org/10.5194/os-7-705-2011, 2011.
Got, H. and Aloisi, J. C.: The Holocene sedimentation on the Gulf of Lions
margin: a quantitative approach, Cont. Shelf Res., 10, 841–855,
https://doi.org/10.1016/0278-4343(90)90062-Q, 1990.
Guyennon, A., Baklouti, M., Diaz, F., Palmieri, J., Beuvier, J., Lebaupin-Brossier, C., Arsouze, T., Béranger, K., Dutay, J.-C., and Moutin, T.: New insights into the organic carbon export in the Mediterranean Sea from 3-D modeling, Biogeosciences, 12, 7025–7046, https://doi.org/10.5194/bg-12-7025-2015, 2015.
Herrmann, M., Estournel, C., Somot, S., Déqué, M., Marsaleix, P.,
and Sevault, F.: Impact of interannual variability and climate change on
dense water cascading in the Gulf of Lions, Cont. Shelf Res., 28,
2092–2112, 2008.
Herrmann, M., Diaz, F., Estournel, C., Marsaleix, P., and Ulses, C.: Impact
of atmospheric and oceanic interannual variability on the Northwestern
Mediterranean Sea pelagic planktonic ecosystem and associated carbon cycle,
J. Geophys. Res.-Oceans, 118, 5792–5813,
https://doi.org/10.1002/jgrc.20405, 2013.
Herrmann, M., Estournel, C., Adloff, F., and Diaz, F.: Impact of climate
change on the northwestern Mediterranean Sea pelagic planktonic ecosystemand
associated carbon cycle. J. Geophys. Res.-Oceans 119, 1–22, https://doi.org/10.1002/2014JC010016, 2014.
Hofmann, E. E., Cahill, B., Fennel, K., Friedrichs, M. A., Hyde, K., Lee,
C., and Xue, J.: Modeling the dynamics of continental shelf carbon, Annu. Rev. Mar. Sci., 3, 93–122,
https://doi.org/10.1146/annurev-marine-120709-142740, 2011.
Hu, Z. Y., Petrenko, A. A., Doglioli, A. M., and Dekeyser, I.: Study of a
mesoscale anticyclonic eddy in the western part of the Gulf of Lion, J. Mar. Syst., 88, 3–11, https://doi.org/10.1016/j.jmarsys.2011.02.008,
2011.
Kessouri, F., Ulses, C., Estournel, C., Marsaleix, P., D'Ortenzio, F.,
Severin, T., and Conan, P.: Vertical mixing effects on phytoplankton
dynamics and organic carbon export in the western Mediterranean Sea, J. Geophys. Res.-Oceans, 123, 1647–1669,
https://doi.org/10.1002/2016JC012669, 2018.
Kessouri, F., Ulses, C., Estournel, C., Marsaleix, P., Severin, T.,
Pujo-Pay, M., and Taillandier, V.: Nitrogen and phosphorus budgets in the
Northwestern Mediterranean deep convection region, J. Geophys. Res.-Oceans, 122, 9429–9454, https://doi.org/10.1002/2016JC012665,
2017.
Lajaunie-Salla, K., Diaz, F., Wimart-Rousseau, C., Wagener, T., Lefèvre, D., Yohia, C., Xueref-Remy, I., Nathan, B., Armengaud, A., and Pinazo, C.: Implementation and assessment of a carbonate system model (Eco3M-CarbOx v1.1) in a highly dynamic Mediterranean coastal site (Bay of Marseille, France), Geosci. Model Dev., 14, 295–321, https://doi.org/10.5194/gmd-14-295-2021, 2021.
Lapouyade, A. and Durrieu de Madron, X.: Seasonal variability of the
advective transport of particulate matter and organic carbon in the Gulf of
Lion (NW Mediterranean), Oceanol. Ac., 24, 295–312,
https://doi.org/10.1016/S0399-1784(01)01148-3, 2001.
Large, W. G. and Yeager, S. G.: Diurnal to decadal global forcing for ocean
and sea-ice models: The data sets and flux climatologies (NCAR Tech. Note
NCAR/TN-4601STR), Boulder, CO: National Center of Atmospheric Research,
https://doi.org/10.5065/D6KK98Q6, 2004.
Lazzari, P., Solidoro, C., Ibello, V., Salon, S., Teruzzi, A., Béranger, K., Colella, S., and Crise, A.: Seasonal and inter-annual variability of plankton chlorophyll and primary production in the Mediterranean Sea: a modelling approach, Biogeosciences, 9, 217–233, https://doi.org/10.5194/bg-9-217-2012, 2012.
Lazzari, P., Mattia, G., Solidoro, C., Salon, S., Crise, A., Zavatarelli, M., Oddo, P., and Vichi, M.: The impacts of climate change and environmental management
policies on the trophic regimes in the Mediterranean Sea: scenario analyses,
J. Mar. Syst., 135, 137–149, https://doi.org/10.1016/j.jmarsys.2013.06.005, 2014.
Lefevre, D., Minas, H. J., Minas, M., Robinson, C., Williams, P. J., Le, B., and
Woodward, E. M. S.: Review of gross community production, primary production,
net community production and dark community respiration in the Gulf of Lion,
Deep-Sea Res. Pt. II, 44, 801–832,
https://doi.org/10.1016/S0967-0645(96)00091-4, 1997.
Legendre, L.: The significance of microalgal blooms for fisheries and for
the export of particulate organic carbon in oceans, J. Plankt. Res., 12, 681–699, https://doi.org/10.1093/plankt/12.4.681, 1990.
Lohrenz, S. E., Redalje, D. G., Cai, W. J., Acker, J., and Dagg, M.: A
retrospective analysis of nutrients and phytoplankton productivity in the
Mississippi River plume, Cont. Shelf. Res., 28, 1466–1475,
https://doi.org/10.1016/j.csr.2007.06.019, 2008.
Liénart, C., Savoye, N., Bozec, Y., Breton, E., Conan, P., David, V.,
Feunteun, E., Grangeré, K., Kerhervé, P., and Sultan, E.:
Dynamics of particulate organic matter composition in coastal systems: a
spatio-temporal study at multi-systems scale, Prog. Oceanogr., 156, 221–239,
https://doi.org/10.1016/j.pocean.2017.03.001, 2017.
Liénart, C., Savoye, N.,David, V., Ramond, P., Tress, P. R., Hanquiez,
V., Marieu, V., Aubert, F., Aubin, S., Bichon, S., Boinet, C., Bourasseau,
L., Bozec, Y., and Susperregui, N.: Dynamics of particulate
organic matter composition in coastal systems: Forcing of spatio-temporal
variability at multi-systems scale, Prog. Oceanogr., 162, 271–289,
https://doi.org/10.1016/j.pocean.2018.02.026, 2018.
Liu, G. and Chai, F.: Seasonal and interannual variability of primary and
export production in the South China Sea: a three-dimensional
physical-biogeochemical model study, ICES J. Mar. Sci., 66,
420–431, https://doi.org/10.1093/icesjms/fsn219, 2009.
Liu, K.-K., Atkinson, L., Quinones, R., and Talaue-NcManus, L.: Carbon and
Nutrient Fluxes in Continental Margins: A Global Synthesis, Springer,
Berlin, Germany, https://doi.org/10.1007/978-3-540-92735-8, 2010.
Ludwig, W., Dumont, E., Meybeck, M., and Heussner, S.: River discharges of
water and nutrients to the Mediterranean and Black Sea: major drivers for
ecosystem changes during past and future decades?, Prog. Oceanogr.,
80, 199–217, https://doi.org/10.1016/j.pocean.2009.02.001, 2009.
Ludwig, W., Bouwman, A. F., Dumont, E., and Lespinas, F.: Water and nutrient
fluxes from major Mediterranean and Black Sea rivers: Past and future trends
and their implications for the basin-scale budgets, Global Biogeochem. Cy., 24, 4, https://doi.org/10.1029/2009GB003594, 2010.
Macias, D., Garcia-Gorriz, E., and Stips, A.: Major fertilization sources and
mechanisms for Mediterranean Sea coastal ecosystems, Limnol. Oceanogr., 63,
897–914, https://doi.org/10.1002/lno.10677, 2018.
Maillet, G. M., Vella, C., Berné, S., Friend, P. L., Amos, C. L.,
Fleury, T. J., and Normand, A.: Morphological changes and sedimentary
processes induced by the December 2003 flood event at the present mouth of
the Grand Rhône River (southern France), Mar. Geol.,, 234, 159–177,
https://doi.org/10.1016/j.margeo.2006.09.025, 2006.
Many, G., Bourrin, F., Durrieu de Madron, X., Ody, A., Doxaran, D., and
Cauchy, P.: Glider and satellite monitoring of the variability of the
suspended particle distribution and size in the Rhône ROFI, Prog. Oceanogr., 163, 123–135, https://doi.org/10.1016/j.pocean.2017.05.006,
2018.
Marsaleix, P.: Sources of the hydrodynamic code used in “Particulate organic carbon dynamics in the Gulf of Lion shelf (NW Mediterranean) using a coupled hydrodynamic–biogeochemical model” by Many et al. 2021, [code], available at: https://sirocco.obs-mip.fr/ocean-models/s-model/download/, last access: 21 September 2021.
Marsaleix, P., Estournel, C., Kondrachoff, V., and Vehil, R.: A numerical
study of the formation of the Rhône River plume, J. Mar.
Syst., 14, 99–115, https://doi.org/10.1016/S0924-7963(97)00011-0, 1998.
Marsaleix, P., Auclair, F., and Estournel, C.: Considerations on Open
Boundary Conditions for Regional and Coastal Ocean Models, J. Atmos. Ocean. Technol., 23, 1604–1613,
https://doi.org/10.1175/JTECH1930.1, 2006.
Marsaleix, P., Auclair, F., Floor, J. W., Herrmann, M. J., Estournel, C.,
Pairaud, I., and Ulses, C.: Energy conservation issues in sigma-coordinate
free-surface ocean models, Ocean Modell., 20, 61–89,
https://doi.org/10.1016/j.ocemod.2007.07.005, 2008.
Minas, M. and Minas, H. J.: Primary production in the Gulf of Lions with
considerations to the Rhone River inputs, Water Pollut. Res. Rep.,
13, 112–125, 1989.
Mikolajczak, G., Estournel, C., Ulses, C., Marsaleix, P., Bourrin, F.,
Martín, J., Pairaud, I., Puig, P., Leredde, Y., Many, G., Seyfried, L.,
and Durrieu de Madron, X.: Impact of storms on residence times and export of
coastal waters during a mild autumn/winter period in the Gulf of Lion, Cont.
Shelf Res., 207, 104192, https://doi.org/10.1016/j.csr.2020.104192, 2020.
Moullec, F., Barrier, N., Drira, S., Guilhaumon, F., Marsaleix, P., Somot,
S., Ulses, C, Velez, L., and Shin, Y.-S.: An end-to-end model reveals losers
and winners in a warming Mediterranean Sea, Front. Mar. Sci., 6, 345, https://doi.org/10.3389/fmars.2019.00345, 2019.
Moutin, T., Raimbault, P., Golterman, H. L., and Coste, B.: The input of
nutrients by the Rhône River into the Mediterranean Sea: Recent
observations and comparison with earlier data, Hydrobiologia, 373, 237,
https://doi.org/10.1023/A:1017020818701, 1998.
Naudin, J. J., Cauwet, G., Chretiennot-Dinet, M. J., Deniaux, B., Devenon,
J.-L., and Pauc, H.: River discharge and wind influence upon particulate
transfer at the land-ocean interaction: Case study of the Rhone River plume,
Estuar. Coast. Shelf Sci., 45, 303–316,
https://doi.org/10.1006/ecss.1996.0190, 1997.
Olita, A., Sorgente, R., Ribotti, A., Fazioli, L., and Perilli, A.: Pelagic
primary production in the Algero-Provençal Basin by means of multisensor
satellite data: focus on interannual variability and its drivers, Ocean
Dynam., 61, 1005–1016, https://doi.org/10.1007/s10236-011-0405-8, 2011.
Pagès, R., Baklouti, M., Barrier, N., Ayache, M., Sevault, F., Somot, S. and Moutin,
T.: Projected Effects of Climate-Induced Changes in Hydrodynamics on the
Biogeochemistry of the Mediterranean Sea Under the RCP 8.5 Regional Climate
Scenario, Front. Mar. Sci., 7, 563615, https://doi.org/10.3389/fmars.2020.563615, 2020.
Palanques, A., Durrieu de Madron, X., Puig, P., Fabres, J., Guillén, J.,
Calafat, A., and Bonnin, J.: Suspended sediment fluxes and transport
processes in the Gulf of Lions submarine canyons, The role of storms and
dense water cascading, Mar. Geol., 234, 43–61,
https://doi.org/10.1016/j.margeo.2006.09.002, 2006.
Pastor, L., Cathalot, C., Deflandre, B., Viollier, E., Soetaert, K., Meysman, F. J. R., Ulses, C., Metzger, E., and Rabouille, C.: Modeling biogeochemical processes in sediments from the Rhône River prodelta area (NW Mediterranean Sea), Biogeosciences, 8, 1351–1366, https://doi.org/10.5194/bg-8-1351-2011, 2011.
Petrenko, A.: Variability of circulation features in the Gulf of Lion NW
Mediterranean Sea. Importance of inertial currents, Oceanol. Ac., 26,
323–338, https://doi.org/10.1016/S0399-1784(03)00038-0., 2003.
Petrenko, A., Leredde, Y., and Marsaleix, P.: Circulation in a stratified and
wind-forced Gulf of Lions, NW Mediterranean Sea: In situ and modeling data,
Cont. Shelf Res., 25, 7–27, https://doi.org/10.1016/j.csr.2004.09.004,
2005.
Petrenko, A., Dufau, C., and Estournel, C.: Barotropic eastward currents in
the western Gulf of Lion, north-western Mediterranean Sea, during stratified
conditions, J. Mar. Syst., 74, 406–428.
https://doi.org/10.1016/j.jmarsys.2008.03.004, 2008.
Pinazo, C., Marsaleix, P., Millet, B., Estournel, C., and Véhil, R.: Spatial and
temporal variability of phytoplankton biomass in upwelling areas of the
northwestern mediterranean: a coupled physical and biogeochemical modelling
approach, J. Mar. Syst., 7, 161–191,
https://doi.org/10.1016/0924-7963(95)00028-3, 1996.
Puig, P., Palanques, A., Orange, D. L., Lastras, G., and Canals, M.: Dense
shelf water cascades and sedimentary furrow formation in the Cap de Creus
Canyon, northwestern Mediterranean Sea, Cont. Shelf Res., 28, 2017–2030,
https://doi.org/10.1016/j.csr.2008.05.002, 2008.
Pujo-Pay, M., Conan, P., Joux, F., Oriol, L., Naudin, J., and Cauwet, G.:
Impact of phytoplankton and bacterial production on nutrient and DOM uptake
in the Rhône River plume (NW Mediterranean), Mar. Ecol. Prog. Ser., 315, 43–54, https://doi.org/10.3354/meps315043, 2006.
Reffray, G., Fraunié, P., and Marsaleix, P.: Secondary flows induced by
wind forcing in the Rhône region of freshwater influence, Ocean
Dynam., 54, 179–196, https://doi.org/10.1007/s10236-003-0079-y, 2004.
Ribera d'Alcalà, M., Civitarese, G., Conversano, F., and Lavezza, R.:
Nutrient ratios and fluxes hint at overlooked processes in the Mediterranean
Sea, J. Geophys. Res.-Oceans, 108, C9,
https://doi.org/10.1029/2002JC001650, 2003.
Richon, C., Dutay, J.-C., Bopp, L., Le Vu, B., Orr, J. C., Somot, S., and Dulac, F.: Biogeochemical response of the Mediterranean Sea to the transient SRES-A2 climate change scenario, Biogeosciences, 16, 135–165, https://doi.org/10.5194/bg-16-135-2019, 2019.
Ross, O. N., Fraysse, M., Pinazo, C., and Pairaud, I.: Impact of an intrusion by the
Northern Current on the biogeochemistry in the eastern Gulf of Lion, NW
Mediterranean, Estuar. Coast. Shelf Sci., 170, 1–9,
https://doi.org/10.1016/j.ecss.2015.12.022, 2016.
Sackmann, B. S., Perry, M. J., and Eriksen, C. C.: Seaglider observations of variability in daytime fluorescence quenching of chlorophyll-a in Northeastern Pacific coastal waters, Biogeosciences Discuss., 5, 2839–2865, https://doi.org/10.5194/bgd-5-2839-2008, 2008.
Sadaoui, M., Ludwig, W., Bourrin, F., and Raimbault, P.: Controls, budgets
and variability of riverine sediment fluxes to the Gulf of Lions (NW
Mediterranean Sea), J. Hydrol., 540, 1002–1015,
https://doi.org/10.1016/j.jhydrol.2016.07.012, 2016.
Sanchez-Vidal, A., Higueras, M., Martí, E., Liquete, C., Calafat, A.,
Kerhervé, P., and Canals, M.: Riverine transport of terrestrial organic
matter to the North Catalan margin, NW Mediterranean Sea, Prog. Oceanogr., 118, 71–80, https://doi.org/10.1016/j.pocean.2013.07.020,
2013.
Sanchez-Vidal, A., Pasqual, C., Kerhervé, P., Calafat, A., Heussner, S.,
Palanques, A., and Puig, P.: Impact of dense shelf water cascading on the
transfer of organic matter to the deep western Mediterranean basin,
Geophys. Res. Lett., 35, 5, https://doi.org/10.1029/2007GL032825,
2008.
Sempéré, R., CharrieÌre, B., Van Wambeke, F., and Cauwet, G.: Carbon
inputs of the Rhône River to the Mediterranean Sea: Biogeochemical
Implications, Global Biogeochem. Cy., 14, 669–681,
https://doi.org/10.1029/1999GB900069, 2000.
Soetaert, K., Herman, P. M. J., Middelburg, J. J., Heip, C., Smith, C. L.,
Tett, P., and Wild-Allen, K.: Numerical modelling of the shelf break
ecosystem: Reproducing benthic and pelagic measurements, Deep Sea Res. Pt. II, 48, 3141–3177, https://doi.org/10.1016/S0967-0645(01)00035-2, 2001.
Somot, S., Sevault, F., and Déqué, M.: Transient climate change
scenario simulation of the Mediterranean Sea for the twenty-first century
using a high-resolution ocean circulation model, Clim. Dynam., 27, 851–879,
https://doi.org/10.1007/s00382-006-0167-z, 2006.
Taucher, J. and Oschlies, A.: Can we predict the direction of marine
primary production change under global warming?, Geophys. Res. Lett., 38, 2, https://doi.org/10.1029/2010GL045934, 2011.
Teruzzi, A., Bolzon, G., Salon, S., Lazzari, P., Solidoro, C., and
Cossarini, G.: Assimilation of coastal and open sea biogeochemical data to
improve phytoplankton simulation in the Mediterranean Sea, Ocean Modell.,
132, 46–60, https://doi.org/10.1016/j.ocemod.2018.09.007, 2018.
Testor, P., Mortier, L., Coppola, L., Claustre, H., D'Ortenzio, F., Bourrin,
F., Durrieu de Madron, X., and Raimbault, P.: Tucpa deployment (EGO glider:
tenuse) (Mediterranean Sea – Western basin), SEANOE,
https://doi.org/10.17882/56441, 2018.
Thomalla, S. J., Moutier, W., Ryan-Keogh, T. J., Gregor, L., and Schütt,
J.: An optimized method for correcting fluorescence quenching using optical
backscattering on autonomous platforms, Limnol. Oceanogr.-Meth.,
16, 132–144, https://doi.org/10.1002/lom3.10234, 2018.
Thunell, R., Benitez-Nelson, C., Varela, R., Astor, Y., and Muller-Karger,
F.: Particulate organic carbon fluxes along upwelling-dominated continental
margins: Rates and mechanisms, Global Biogeochem. Cy., 21, 1,
https://doi.org/10.1029/2006GB002793, 2007.
Tusseau-Vuillemin, M. H., Mortier, L., and Herbaut, C.: Modeling nitrate
fluxes in an open coastal environment (Gulf of Lions): Transport versus
biogeochemical processes, J. Geophys. Res.-Oceans, 103,
7693–7708, https://doi.org/10.1029/97JC03709, 1998.
Ulses, C., Auger, P.-A., Soetaert, K., Marsaleix, P., Diaz, F., Coppola, L.,
and Estournel, C.: Budget of organic carbon in the North-Western
Mediterranean Open Sea over the period 2004–2008 using 3-D coupled
physical-biogeochemical modeling, J. Geophys. Res.-Oceans,
121, 7026–7055, https://doi.org/10.1002/2016JC011818, 2016.
Ulses, C., Estournel, C., Bonnin, J., Durrieu de Madron, X., and Marsaleix,
P.: Impact of storms and dense water cascading on shelf-slope exchanges in
the Gulf of Lion (NW Mediterranean), J. Geophys. Res., 113,
C02010, https://doi.org/10.1029/2006JC00379, 2008a.
Ulses, C., Estournel, C., Durrieu de Madron, X., and Palanques, A.:
Suspended sediment transport in the Gulf of Lions (NW Mediterranean): Impact
of extreme storms and floods, Cont. Shelf Res., 28, 2048–2070,
https://doi.org/10.1016/j.csr.2008.01.015, 2008b.
Ulses, C., Estournel, C., Puig, P., Durrieu de Madron, X., and Marsaleix,
P.: Dense shelf water cascading in the northwestern Mediterranean during the
cold winter 2005: Quantification of the export through the Gulf of Lion and
the Catalan margin, Geophys. Res. Lett., 35, 7,
https://doi.org/10.1029/2008GL033257, 2008c.
Short summary
The Gulf of Lion shelf is one of the most productive areas in the Mediterranean. A model is used to study the mechanisms that drive the particulate organic carbon (POC). The model reproduces the annual cycle of primary production well. The shelf appears as an autotrophic ecosystem with a high production and as a source of POC for the adjacent basin. The increase in temperature induced by climate change could impact the trophic status of the shelf.
The Gulf of Lion shelf is one of the most productive areas in the Mediterranean. A model is used...
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