Laure‐Sophie Schiettecatte

Food and Agriculture Organization of the United Nations

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Alberto Borges

University of Liège

Yann Bozec

Station Biologique de Roscoff

Helmuth Thomas

Helmholtz-Zentrum Hereon

H. J. W. de Baar

Ecosystem Sciences

Bruno Delille

University of Liège

Claar van der Zee

Office of the Chief Scientist

Fréderic Gazeau

Laboratoire d’Océanographie de Villefranche

A. E. Friederike Prowe

GEOMAR Helmholtz Centre for Ocean Research Kiel

Michel Frankignoulle

Institut Océanographique

Martial Bernoux

Food and Agriculture Organization of the United Nations

Cooperative Institutions

Food and Agriculture Organization of the United Nations

University of Liège

Centre National de la Recherche Scientifique

Royal Netherlands Institute for Sea Research

Université Libre de Bruxelles

Vrije Universiteit Brussel

Sorbonne Université

University of Antwerp

Institut de Recherche pour le Développement

Université Paris Cité

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Preliminary results of continuous oxygen measurement above a Posidonia oceanica seagrass bed in the Bay of Calvi (Corsica)

Laure‐Sophie Schiettecatte Willy Champenois Bruno Delille Alberto Borges

Posidonia oceanica

Potamogetonaceae

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Carbon dioxide in European coastal waters

Estuarine Coastal and Shelf Science (2006)

Alberto Borges Laure‐Sophie Schiettecatte Gwénaël Abril Bruno Delille Fréderic Gazeau

10.1016/j.ecss.2006.05.046

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Citations (287)

Estimating pCO2 from remote sensing in the Case-II waters of the Belgian coastal zone – First results from the BELCOLOUR-II project

Geophysical Research Abstracts (2008)

Alberto Borges K. Suykens M.-V. Commarieux Laure‐Sophie Schiettecatte Bruno Delille

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Time series of the partial pressure of carbon dioxide (2001–2004) and preliminary inorganic carbon budget in the Scheldt plume (Belgian coastal waters)

Geochemistry Geophysics Geosystems (2006)

Laure‐Sophie Schiettecatte Fréderic Gazeau Claar van der Zee Natacha Brion Alberto Borges

A 4‐year time series (2001–2004) of the partial pressure of CO 2 (pCO 2 ) and air‐sea CO 2 fluxes is reported in the Scheldt estuarine plume. This system is oversaturated in CO 2 with respect to the atmosphere, except during the spring phytoplanktonic bloom, and acts as a net source of CO 2 to the atmosphere of 0.7 mol C m −2 yr −1 that represents 7 to 27% of the inner Scheldt estuary CO 2 emission. Results also highlight that a high spatial and temporal coverage of the surface pCO 2 in coastal ecosystems is crucial for reliable estimations of air‐sea CO 2 fluxes. The seasonal variations of pCO 2 seem to be more dominated by biological activities (photosynthesis/respiration) than by temperature change. A stochiometrically linked C/P mass balance budget failed to provide net ecosystem production estimates consistent with the pCO 2 dynamics in this area. It is hypothesized that this discrepancy is related to physiological characteristics of the dominant phytoplanktonic species ( Phaeocystis sp. ) within the studied area. On the basis of a preliminary dissolved inorganic carbon input/output budget, the annual emission of CO 2 toward the atmosphere seems to be largely due to the outgassing of the inputs of CO 2 from the inner Scheldt estuary, rather than due to organic carbon degradation.

Outgassing

Carbon fibers

Bloom

Partial pressure

10.1029/2005gc001161

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Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments

Biogeosciences (2009)

H. Thomas Laure‐Sophie Schiettecatte K. Suykens Y. J. M. Koné Elizabeth H. Shadwick

Abstract. The coastal ocean is a crucial link between land, the open ocean and the atmosphere. The shallowness of the water column permits close interactions between the sedimentary, aquatic and atmospheric compartments, which otherwise are decoupled at long time scales (≅ 1000 yr) in the open oceans. Despite the prominent role of the coastal oceans in absorbing atmospheric CO2 and transferring it into the deep oceans via the continental shelf pump, the underlying mechanisms remain only partly understood. Evaluating observations from the North Sea, a NW European shelf sea, we provide evidence that anaerobic degradation of organic matter, fuelled from land and ocean, generates total alkalinity (AT) and increases the CO2 buffer capacity of seawater. At both the basin wide and annual scales anaerobic AT generation in the North Sea's tidal mud flat area irreversibly facilitates 7–10%, or taking into consideration benthic denitrification in the North Sea, 20–25% of the North Sea's overall CO2 uptake. At the global scale, anaerobic AT generation could be accountable for as much as 60% of the uptake of CO2 in shelf and marginal seas, making this process, the anaerobic pump, a key player in the biological carbon pump. Under future high CO2 conditions oceanic CO2 storage via the anaerobic pump may even gain further relevance because of stimulated ocean productivity.

Alkalinity

10.5194/bg-6-267-2009

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Citations (194)

Mechanisms controlling the air–sea flux in the North Sea

Continental Shelf Research (2009)

A. E. Friederike Prowe Helmuth Thomas Johannes Pätsch Wilfried Kühn Yann Bozec

Biogeochemical Cycle

Spring bloom

10.1016/j.csr.2009.06.003

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Citations (54)

Nitrogen and carbon cycling in the North Sea and exchange with the North Atlantic—A model study, Part II: Carbon budget and fluxes

Continental Shelf Research (2010)

Wilfried Kühn Johannes Pätsch Helmuth Thomas Alberto Borges Laure‐Sophie Schiettecatte

Biogeochemical Cycle

Biogeochemistry

Sink (geography)

Carbon sink

10.1016/j.csr.2010.07.001

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Citations (86)

The carbon budget of the North Sea

Biogeosciences (2005)

Helmuth Thomas Yann Bozec H. J. W. de Baar Khalid Elkalay Michel Frankignoulle

Abstract. A carbon budget has been established for the North Sea, a shelf sea on the NW European continental shelf. The carbon exchange fluxes with the North Atlantic Ocean dominate the gross carbon budget. The net carbon budget – more relevant to the issue of the contribution of the coastal ocean to the marine carbon cycle – is dominated by the carbon inputs from rivers, the Baltic Sea and the atmosphere. The North Sea acts as a sink for organic carbon and thus can be characterised as a heterotrophic system. The dominant carbon sink is the final export to the North Atlantic Ocean. More than 90% of the CO2 taken up from the atmosphere is exported to the North Atlantic Ocean making the North Sea a highly efficient continental shelf pump for carbon.

Carbon sink

Sink (geography)

Carbon fibers

10.5194/bg-2-87-2005

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Citations (168)

Biogeocehmical study of a coccolithophore bloom at the continental margin in the Northeast Atlantic

Jérôme Harlay Claar van der Zee Laure‐Sophie Schiettecatte Ricardo H. M. Godoi Katrien Aerts

Coccolithophore

Bloom

Continental Margin

Margin (machine learning)

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Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments

Helmuth Thomas Laure‐Sophie Schiettecatte K. Suykens Y. J. M. Koné Elizabeth H. Shadwick

Abstract. The coastal ocean constitutes the crucial link between land, the open ocean and the atmosphere. Furthermore, its shallow water column permits close interactions between the sedimentary and atmospheric compartments, which otherwise are decoupled at short time scales (<1000 yr) in the open oceans. Despite the prominent role of the coastal oceans in absorbing atmospheric CO2 and transferring it into the deep oceans via the continental shelf pump, the underlying mechanisms remain only partly understood. Evaluating observations from the North Sea, a NW European shelf sea, we provide evidence that anaerobic degradation of organic matter, fuelled from land and ocean, generates alkalinity (AT) and increases the CO2 buffer capacity of seawater. At both the basin wide and annual scales anaerobic AT generation in the North Sea's tidal mud flat area irreversibly facilitates 7–10%, or taking into consideration benthic denitrification in the North Sea, 20–25% of the North Sea's overall CO2 uptake. At the global scale, anaerobic AT generation could be accountable for as much as 60% of the uptake of CO2 in shelf and marginal seas, making this process, the anaerobic pump, a key player in the biological carbon pump. Under future high CO2 conditions oceanic CO2 storage via the anaerobic pump may even gain further relevance because of stimulated ocean productivity.

Alkalinity

10.5194/bgd-5-3575-2008

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Citations (31)