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| Titel |
The formaldehyde budget as seen by a global-scale multi-constraint and multi-species inversion system |
| VerfasserIn |
A. Fortems-Cheiney, F. Chevallier, I. Pison, P. Bousquet, M. Saunois, S. Szopa, C. Cressot, T. P. Kurosu, K. Chance, A. Fried |
| 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 ; 12, no. 15 ; Nr. 12, no. 15 (2012-08-01), S.6699-6721 |
| Datensatznummer |
250011352
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| Publikation (Nr.) |
 copernicus.org/acp-12-6699-2012.pdf |
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| Zusammenfassung |
| For the first time, carbon monoxide (CO) and formaldehyde (HCHO) satellite
retrievals are used together with methane (CH4) and methyl choloroform
(CH3CCl3 or MCF) surface measurements in an advanced inversion system.
The CO and HCHO are respectively from the MOPITT and OMI instruments. The
multi-species and multi-satellite dataset inversion is done for the
2005–2010 period. The robustness of our results is evaluated by comparing
our posterior-modeled concentrations with several sets of independent
measurements of atmospheric mixing ratios. The inversion leads to significant
changes from the prior to the posterior, in terms of magnitude and
seasonality of the CO and CH4 surface fluxes and of the HCHO production by
non-methane volatile organic compounds (NMVOC). The latter is significantly
decreased, indicating an overestimation of the biogenic NMVOC emissions, such
as isoprene, in the GEIA inventory. CO and CH4 surface emissions are
increased by the inversion, from 1037 to 1394 TgCO and from
489 to 529 TgCH4 on average for the 2005–2010 period. CH4
emissions present significant interannual variability and a joint CO-CH4
fluxes analysis reveals that tropical biomass burning probably played a role
in the recent increase of atmospheric methane. |
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