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Título

Temporal variability of the anthropogenic CO2 storage in the Irminger Sea

AutorPérez, Fiz F. ; Vázquez Rodríguez, Marcos ; Louarn, E.; Padín, X. A. ; Mercier, Herlé; Ríos, Aida F.
Palabras claveCO2
Storage
Fecha de publicación11-dic-2008
EditorEuropean Geosciences Union
Copernicus Publications
CitaciónBiogeosciences 5: 1669-1679 (2008)
ResumenThe anthropogenic CO2 (C-ant) estimates from cruises spanning more than two decades (1981–2006) in the Irminger Sea area of the North Atlantic Subpolar Gyre reveal a large variability in the C-ant storage rates. During the early 1990’s, the C-ant storage rates (2.3 ± 0.6 mol C m−2 yr−1) doubled the average rate for 1981–2006 (1.1 ± 0.1 mol C m−2 yr−1), whilst a remarkable drop to almost half that average followed from 1997 onwards. The C-ant storage evolution runs parallel to chlorofluorocarbon-12 inventories and is in good agreement with C-ant uptake rates of increase calculated from sea surface pCO2 measurements. The contribution of the Labrador Seawater to the total inventory of C-ant in the Irminger basin dropped from 66% in the early 1990s to 49% in the early 2000s. The North Atlantic Oscillation shift from a positive to a negative phase in 1996 led to a reduction of air-sea heat loss in the Labrador Sea. The consequent convection weakening accompanied by an increase in stratification has lowered the efficiency of the northern North Atlantic CO2 sink.
Descripción11 pages, 4 figures.
Versión del editorhttp://www.biogeosciences.net/5/1669/2008/bg-5-1669-2008.html
URIhttp://hdl.handle.net/10261/9473
ISSN1726-4170 (Print)
1726-4189 (Online)
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