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| Titel |
An airborne regional carbon balance for Central Amazonia |
| VerfasserIn |
J. Lloyd, O. Kolle, H. Fritsch, S. R. Freitas, M. A. F. Silva Dias, P. Artaxo, A. D. Nobre, A. C. Araújo, B. Kruijt, L. Sogacheva, G. Fisch, A. Thielmann, U. Kuhn, M. O. Andreae |
| 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 ; 4, no. 5 ; Nr. 4, no. 5 (2007-09-14), S.759-768 |
| Datensatznummer |
250001959
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| Publikation (Nr.) |
 copernicus.org/bg-4-759-2007.pdf |
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| Zusammenfassung |
| We obtained regional estimates of surface CO2 exchange rates using
atmospheric boundary layer budgeting techniques above tropical forest near
Manaus, Brazil. Comparisons were made with simultaneous measurements from
two eddy covariance towers below. Although there was good agreement for
daytime measurements, large differences emerged for integrating periods
dominated by the night-time fluxes. These results suggest that a systematic
underestimation of night time respiratory effluxes may be responsible for
the high Amazonian carbon sink suggested by several previous eddy covariance
studies. Large CO2 fluxes from riverine sources or high respiratory
losses from recently disturbed forests do not need to be invoked in order to
balance the carbon budget of the Amazon. Our results do not, however,
discount some contribution of these processes to the overall Amazon carbon
budget. |
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