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The reinvigoration of the Southern Ocean carbon sink.

Identifieur interne : 002561 ( PubMed/Checkpoint ); précédent : 002560; suivant : 002562

The reinvigoration of the Southern Ocean carbon sink.

Auteurs : Peter Landschützer [Suisse] ; Nicolas Gruber [Suisse] ; F Alexander Haumann [Suisse] ; Christian Rödenbeck [Allemagne] ; Dorothee C E. Bakker [Royaume-Uni] ; Steven Van Heuven [Allemagne] ; Mario Hoppema [Allemagne] ; Nicolas Metzl [France] ; Colm Sweeney [États-Unis] ; Taro Takahashi [États-Unis] ; Bronte Tilbrook [Australie] ; Rik Wanninkhof [États-Unis]

Source :

RBID : pubmed:26359401

Descripteurs français

English descriptors

Abstract

Several studies have suggested that the carbon sink in the Southern Ocean-the ocean's strongest region for the uptake of anthropogenic CO2 -has weakened in recent decades. We demonstrated, on the basis of multidecadal analyses of surface ocean CO2 observations, that this weakening trend stopped around 2002, and by 2012, the Southern Ocean had regained its expected strength based on the growth of atmospheric CO2. All three Southern Ocean sectors have contributed to this reinvigoration of the carbon sink, yet differences in the processes between sectors exist, related to a tendency toward a zonally more asymmetric atmospheric circulation. The large decadal variations in the Southern Ocean carbon sink suggest a rather dynamic ocean carbon cycle that varies more in time than previously recognized.

DOI: 10.1126/science.aab2620
PubMed: 26359401


Affiliations:


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Le document en format XML

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<div type="abstract" xml:lang="en">Several studies have suggested that the carbon sink in the Southern Ocean-the ocean's strongest region for the uptake of anthropogenic CO2 -has weakened in recent decades. We demonstrated, on the basis of multidecadal analyses of surface ocean CO2 observations, that this weakening trend stopped around 2002, and by 2012, the Southern Ocean had regained its expected strength based on the growth of atmospheric CO2. All three Southern Ocean sectors have contributed to this reinvigoration of the carbon sink, yet differences in the processes between sectors exist, related to a tendency toward a zonally more asymmetric atmospheric circulation. The large decadal variations in the Southern Ocean carbon sink suggest a rather dynamic ocean carbon cycle that varies more in time than previously recognized.</div>
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