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| Titel |
Temporal variability of the anthropogenic CO2 storage in the Irminger Sea |
| VerfasserIn |
F. F. Pérez, M. Vázquez-Rodríguez, E. Louarn, X. A. Padin, H. Mercier, A. F. Ríos |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 5, no. 6 ; Nr. 5, no. 6 (2008-12-11), S.1669-1679 |
| Datensatznummer |
250002932
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| Publikation (Nr.) |
 copernicus.org/bg-5-1669-2008.pdf |
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| Zusammenfassung |
| The anthropogenic CO2 (Cant) 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 Cant storage rates.
During the early 1990's, the Cant 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 Cant
storage evolution runs parallel to chlorofluorocarbon-12 inventories and is
in good agreement with Cant uptake rates of increase calculated from
sea surface pCO2 measurements. The contribution of the Labrador Seawater
to the total inventory of Cant 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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