ORBi: Bozec Y. - Assessment of the processes controlling the seasonal variations of dissolved inorganic carbon in the North Sea

Reference : Assessment of the processes controlling the seasonal variations of dissolved inorganic c...


	Document type :	Scientific journals : Article
	Discipline(s) :	Life sciences : Aquatic sciences & oceanology
	To cite this reference:	http://hdl.handle.net/2268/2595

Title :	Assessment of the processes controlling the seasonal variations of dissolved inorganic carbon in the North Sea
Language :	English
Author, co-author :	Bozec, Y. [> > > >]
	Thomas, H. [> > > >]
	Schiettecatte, L. S. [> > > >]
	Borges, Alberto [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie chimique >]
	Elkalay, K. [> > > >]
	de Baar, Hein J. W. [> > > >]
Publication date :	2006
Journal title :	Limnology & Oceanography
Publisher :	American Society of Limnology & Oceanography/Kansas
Volume :	51
Issue/season :	6
Pages :	2746–2762
Audience :	International
ISSN :	0024-3590
City :	Waco
Country :	TX
Abstract :	[en] We used a seasonal North Sea data set comprising dissolved inorganic carbon (DIC), partial pressure of CO2 (pCO2), and inorganic nutrients to assess the abiotic and biological processes governing the monthly variations of DIC. During winter, advection and air–sea exchange of CO2 control and increase the DIC content in the surface and deeper layers of the northern and central North Sea, with the atmosphere supplying CO2 on the order of 0.2 mol C m22 month21 to these areas. From February to July, net community production (NCP) controls the seasonal variations of DIC in the surface waters of the entire North Sea, with a net uptake ranging from 0.5 to 1.4 mol C m22 month21. During the August–December period, NCP controls the seasonal variations of DIC in the southern North Sea, with a net release ranging from 0.5 to 0.8 mol C m22 month21. Similarly, during the April–August period in the deeper layer of the northern North Sea, the NCP was the main factor controlling DIC concentrations, with a net release ranging from 0.5 to 5.5 mol C m22 month21. In the surface layer of the North Sea, NCP on the basis of DIC was 4.3 6 0.4 mol C m22 yr21, whereas, NCP on the basis of nitrate was 1.6 6 0.2 mol C m22 yr21. Under nutrient-depleted conditions, preferential recycling (extracellular) of nutrients and intracellular mechanisms occurred and were responsible for the non-Redfield uptake of DIC versus nitrate and phosphate.
Target :	Researchers
Permalink :	http://hdl.handle.net/2268/2595

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