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| Titel |
On the consistency between global and regional methane emissions inferred from SCIAMACHY, TANSO-FTS, IASI and surface measurements |
| VerfasserIn |
C. Cressot, F. Chevallier, P. Bousquet, C. Crevoisier, E. J. Dlugokencky, A. Fortems-Cheiney, C. Frankenberg, R. Parker, I. Pison, R. A. Scheepmaker, S. A. Montzka, P. B. Krummel, L. P. Steele, R. L. Langenfelds |
| 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 ; 14, no. 2 ; Nr. 14, no. 2 (2014-01-20), S.577-592 |
| Datensatznummer |
250118293
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| Publikation (Nr.) |
 copernicus.org/acp-14-577-2014.pdf |
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| Zusammenfassung |
| Satellite retrievals of methane weighted atmospheric columns are
assimilated within a Bayesian inversion system to infer the global
and regional methane emissions and sinks for the period August 2009
to July 2010. Inversions are independently computed from three different
space-borne observing systems and one surface observing system under
several hypotheses for prior-flux and observation errors. Posterior
methane emissions are compared and evaluated against surface
mole fraction observations via a chemistry-transport model. Apart
from SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric
CartograpHY), the simulations agree fairly well with the surface
mole fractions. The most consistent configurations of this study
using TANSO-FTS (Thermal And Near infrared Sensor for carbon
Observation – Fourier Transform Spectrometer), IASI
(Infrared Atmospheric Sounding Interferometer) or surface measurements
induce posterior methane global emissions of, respectively,
565 ± 21 Tg yr−1, 549 ± 36 Tg yr−1
and 538 ± 15 Tg yr−1 over the
one-year period August 2009–July 2010. This consistency between the
satellite retrievals (apart from SCIAMACHY) and independent surface
measurements is promising for future improvement of CH4 emission
estimates by atmospheric inversions. |
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