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| Titel |
Carbon balance of South Asia constrained by passenger aircraft CO2 measurements |
| VerfasserIn |
P. K. Patra, Y. Niwa, T. J. Schuck, C. A. M. Brenninkmeijer, T. Machida, H. Matsueda, Y. Sawa |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 9 ; Nr. 11, no. 9 (2011-05-06), S.4163-4175 |
| Datensatznummer |
250009696
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| Publikation (Nr.) |
 copernicus.org/acp-11-4163-2011.pdf |
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| Zusammenfassung |
| Quantifying the fluxes of carbon dioxide (CO2) between the
atmosphere and terrestrial ecosystems in all their diversity, across
the continents, is important and urgent for implementing effective
mitigating policies. Whereas much is known for Europe and North
America for instance, in comparison, South Asia, with 1.6 billion
inhabitants and considerable CO2 fluxes, remained terra
incognita in this respect. We use regional measurements of atmospheric
CO2 aboard a Lufthansa passenger aircraft between Frankfurt
(Germany) and Chennai (India) at cruise altitude, in addition to the
existing network sites for 2008, to estimate monthly fluxes for
64-regions using Bayesian inversion and transport model
simulations. The applicability of the model's transport
parameterization is confirmed using SF6, CH4 and
N2O simulations for the CARIBIC datasets. The annual amplitude of carbon flux obtained by including the aircraft data is twice as large as the
fluxes simulated by a terrestrial ecosystem model that was applied to
prescribe the fluxes used in the inversions. It is shown that South
Asia sequestered carbon at a rate of 0.37 ± 0.20 Pg C yr−1
(1 Pg C = 1015 g of carbon in CO2) for the years 2007 and
2008. The seasonality and the strength of the calculated monthly
fluxes are successfully validated using independent measurements of
vertical CO2 profiles over Delhi and spatial variations at
cruising altitude over Asia aboard Japan Airlines passenger aircraft. |
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