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| Titel |
Global ocean carbon uptake: magnitude, variability and trends |
| VerfasserIn |
R. Wanninkhof, G.-H. Park, T. Takahashi, C. Sweeney, R. Feely, Y. Nojiri, N. Gruber, S. C. Doney, G. A. McKinley, A. Lenton, C. Quéré, C. Heinze, J. Schwinger, H. Graven, S. Khatiwala |
| 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 ; 10, no. 3 ; Nr. 10, no. 3 (2013-03-22), S.1983-2000 |
| Datensatznummer |
250018167
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| Publikation (Nr.) |
 copernicus.org/bg-10-1983-2013.pdf |
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| Zusammenfassung |
| The globally integrated sea–air anthropogenic carbon dioxide (CO2) flux
from 1990 to 2009 is determined from models and data-based approaches as
part of the Regional Carbon Cycle Assessment and Processes (RECCAP) project.
Numerical methods include ocean inverse models, atmospheric inverse models,
and ocean general circulation models with parameterized biogeochemistry
(OBGCMs). The median value of different approaches shows good agreement in
average uptake. The best estimate of anthropogenic CO2 uptake for the
time period based on a compilation of approaches is −2.0 Pg C yr−1.
The interannual variability in the sea–air flux is largely driven by
large-scale climate re-organizations and is estimated at
0.2 Pg C yr−1 for the two decades with some systematic differences
between approaches. The largest differences between approaches are seen in
the decadal trends. The trends range from −0.13
(Pg C yr−1) decade−1 to −0.50 (Pg C yr−1) decade−1
for the two decades under investigation. The OBGCMs and the data-based
sea–air CO2 flux estimates show appreciably smaller decadal trends than
estimates based on changes in carbon inventory suggesting that methods
capable of resolving shorter timescales are showing a slowing of the rate of
ocean CO2 uptake. RECCAP model outputs for five decades show similar
differences in trends between approaches. |
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