Publication Date:
2022-05-25
Description:
© The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Biogeosciences 10 (2013): 1983-2000, doi:10.5194/bg-10-1983-2013.
Description:
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.
Description:
RW, G-HP., RAF were supported
in part through the Global Carbon Data Management and
Synthesis Project of the NOAA Climate Program Office. NG
and HG were supported by funds from ETH Zurich and through
the FP7 projects CarboChange (Project reference 264879) and
GeoCarbon. CS was supported by grants, NSF/OPP 0944761
and NOAA NA12OAR4310058. SCD acknowledges support
through the NOAA Climate Process Team activity, NOAA grant
NA07OAR4310098. CH and JS were supported through EU FP7
project COMBINE (grant agreement no. 226520), the Research
Council of Norway funded project CarboSeason (185105/S30),
the Norwegian Metacenter for Computational Science and Storage
Infrastructure (NOTUR and Norstore, “Biogeochemical Earth
system modeling” projects nn2980k and ns2980k) and the core
project BIOFEEDBACK of the Centre for Climate Dynamics
(SKD) within the Bjerknes Centre for Climate Research.
Repository Name:
Woods Hole Open Access Server
Type:
Article
Format:
application/pdf
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