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Influence of differences in current GOSAT X CO 2 retrievals on surface flux estimation
Author(s) -
Takagi Hiroshi,
Houweling Sander,
Andres Robert J.,
Belikov Dmitry,
Bril Andrey,
Boesch Hartmut,
Butz Andre,
Guerlet Sandrine,
Hasekamp Otto,
Maksyutov Shamil,
Morino Isamu,
Oda Tomohiro,
O'Dell Christopher W.,
Oshchepkov Sergey,
Parker Robert,
Saito Makoto,
Uchino Osamu,
Yokota Tatsuya,
Yoshida Yukio,
Valsala Vinu
Publication year - 2014
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2013gl059174
Subject(s) - environmental science , inversion (geology) , satellite , flux (metallurgy) , carbon flux , greenhouse gas , atmospheric sciences , remote sensing , climatology , geology , physics , chemistry , paleontology , ecology , oceanography , organic chemistry , structural basin , astronomy , ecosystem , biology
We investigated differences in the five currently‐available datasets of column‐integrated CO 2 concentrations ( X C O 2) retrieved from spectral soundings collected by Greenhouse gases Observing SATellite (GOSAT) and assessed their impact on regional CO 2 flux estimates. We did so by estimating the fluxes from each of the five X C O 2datasets combined with surface‐based CO 2 data, using a single inversion system. The five X C O 2datasets are available in raw and bias‐corrected versions, and we found that the bias corrections diminish the range of the five coincident values by ~30% on average. The departures of the five individual inversion results (annual‐mean regional fluxes based on X C O 2‐surface combined data) from the surface‐data‐only results were close to one another in some terrestrial regions where spatial coverage by each X C O 2dataset was similar. The mean of the five annual global land uptakes was 1.7 ± 0.3 GtC yr −1 , and they were all smaller than the value estimated from the surface‐based data alone.