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| Titel |
Recent changes in the global and regional carbon cycle: analysis of first-order diagnostics |
| VerfasserIn |
P. J. Rayner, A. Stavert, M. Scholze, A. Ahlstrom, C. E. Allison, R. M. Law |
| 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 ; 12, no. 3 ; Nr. 12, no. 3 (2015-02-11), S.835-844 |
| Datensatznummer |
250117808
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| Publikation (Nr.) |
 copernicus.org/bg-12-835-2015.pdf |
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| Zusammenfassung |
| We analyse global and regional changes in CO2 fluxes using
two simple models, an airborne fraction of anthropogenic emissions
and a linear relationship with CO2 concentrations. We show
that both models are able to fit the non-anthropogenic (hereafter
natural) flux over the length of the atmospheric concentration
record. Analysis of the linear model (including its
uncertainties) suggests no significant decrease in the response of the
natural carbon cycle. Recent data points rather to an increase. We apply the same linear diagnostic to
fluxes from atmospheric inversions. Flux responses show clear
regional and seasonal patterns driven by terrestrial uptake in the
northern summer. Ocean fluxes show little or no linear
response. Terrestrial models show clear responses, agreeing
globally with the inversion responses, however the spatial structure
is quite different, with dominant responses in the tropics rather
than the northern extratropics. |
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