Temporal variability of the anthropogenic CO2 storage in the Irminger Sea

Type Article
Date 2008-12
Language English
Author(s) Perez F. F.1, Vazquez-Rodriguez M.1, Louarn E.2, 3, Padin X. A.1, Mercier HerleORCID4, Rios A. F.1
Affiliation(s) 1 : CSIC, Inst Invest Marinas, Vigo 36208, Spain.
2 : Inst Univ Europeen Mer, Lab Chim Marine, Plouzane, France.
3 : UPMC, CNRS, Biol Stn, F-29682 Roscoff, France.
4 : Inst Francais Rech Exploitat Mer, Ctr Brest, CNRS, Lab Phys Oceans,IRD,UBO, F-29280 Plouzane, France.
Source Biogeosciences (1726-4170) (Copernicus publications), 2008-12 , Vol. 5 , N. 6 , P. 1669-1679
WOS© Times Cited 34
Abstract The 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 pCO(2) 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.
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Perez F. F., Vazquez-Rodriguez M., Louarn E., Padin X. A., Mercier Herle, Rios A. F. (2008). Temporal variability of the anthropogenic CO2 storage in the Irminger Sea. Biogeosciences, 5(6), 1669-1679. Open Access version : https://archimer.ifremer.fr/doc/00000/5925/