  The North Sea; ; et al in Carbon and Nutrient Fluxes in Continental Margins (2009) Detailed reference viewed: 23 (3 ULg)Enhanced ocean carbon storage from anaerobic alkalinity generation in coastal sediments; ; Suykens, Kim  et alin Biogeosciences (2009), 6 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 ... [more ▼] 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. [less ▲] Detailed reference viewed: 58 (6 ULg)Mechanisms controlling the air-sea CO2 flux in the North Sea; ; et al in Continental Shelf Research (2009), 29 The mechanisms driving the air–sea exchange of carbon dioxide (CO2) in the North Sea are investigated using the three-dimensional coupled physical–biogeochemical model ECOHAM (ECOlogical model, HAMburg ... [more ▼] The mechanisms driving the air–sea exchange of carbon dioxide (CO2) in the North Sea are investigated using the three-dimensional coupled physical–biogeochemical model ECOHAM (ECOlogical model, HAMburg). We validate our simulations using field data for the years 2001–2002 and identify the controls of the air–sea CO2 flux for two locations representative for the North Sea’s biogeochemical provinces. In the seasonally stratified northern region, net CO2 uptake is high (2:06molm 2 a 1) due to high net community production (NCP) in the surface water. Overflow production releasing semi labile dissolved organic carbon needs to be considered for a realistic simulation of the low dissolved inorganic carbon (DIC) concentrations observed during summer. This biologically driven carbon drawdown outcompetes the temperature-driven rise in CO2 partial pressure (pCO2) during the productive season. In contrast, the permanently mixed southern region is a weak net CO2 source (0:78molm 2 a 1). NCP is generally low except for the spring bloom because remineralization parallels primary production. Here, the pCO2 appears to be controlled by temperature. [less ▲] Detailed reference viewed: 74 (1 ULg)A revised carbon budget for the North Sea; ; Borges, Alberto et alConference (2009) Detailed reference viewed: 4 (0 ULg)First year of results from a mooring over a Posidonia Oceanica seagrass meadow (Corsica, France)Borges, Alberto ; Delille, Bruno ; Beckers, Jean-Marie et alConference (2008) Detailed reference viewed: 8 (0 ULg)Variability of the partial pressure of CO2 in the upper Scheldt estuary from 2003 to 2007Borges, Alberto ; ; Commarieu, Marc-Vincent et alPoster (2008) Detailed reference viewed: 4 (1 ULg)Estimating pCO2 from remote sensing in the Case-II waters of the Belgian Coastal Zone – First results from the BELCOLOUR-II projectBorges, Alberto ; ; Commarieu, Marc-Vincent et alPoster (2008) Detailed reference viewed: 5 (0 ULg)Carbon dioxide in European coastal watersBorges, Alberto ; ; et alPoster (2007) Detailed reference viewed: 1 (0 ULg)Preliminary results of continuous oxygen measurement above a Posidonia oceanica seagrass bed in the Bay of Calvi (Corsica); Champenois, Willy ; Delille, Bruno et alPoster (2007) Detailed reference viewed: 10 (2 ULg)Variations of the partial pressure of carbon dioxide in the upper Scheldt estuary from 1993 to 2006; Borges, Alberto Poster (2007) Detailed reference viewed: 1 (0 ULg)Carbon dioxide in European coastal watersBorges, Alberto ; ; et alPoster (2007) Detailed reference viewed: 3 (0 ULg)Carbon dioxide in European coastal watersBorges, Alberto ; ; et alPoster (2006) Detailed reference viewed: 1 (0 ULg) |
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