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Does GOSAT capture the true seasonal cycle of carbon dioxide

Lindqvist, H.; O'Dell, C.W.; Basu, S.; Boesch, H.; Chevallier, F.; Deutscher, N.; Feng, L.; Fisher, B.; Hase, F.; Inoue, M.; Kivi, R.; Morino, I.; Palmer, P.I.; Parker, R.; Schneider, M.; Sussmann, R.; Yoshida, Y.

Abstract:
The seasonal cycle accounts for a dominant mode of total column CO$_{2}$ (XCO$_{2}$) annual variability and is connected to CO$_{2}$ uptake and release; it thus represents an important quantity to test the accuracy of the measurements from space.We quantitatively evaluate the XCO$_{2}$ seasonal cycle of the Greenhouse Gases Observing Satellite (GOSAT) observations from the Atmospheric CO$_{2}$ Observations from Space (ACOS) retrieval system and compare average regional seasonal cycle features to those directly measured by the Total Carbon Column Observing Network (TCCON). We analyse the mean seasonal cycle amplitude, dates of maximum and minimum XCO$_{2}$, as well as the regional growth rates in XCO$_{2}$ through the fitted trend over several years.We find that GOSAT/ACOS captures the seasonal cycle amplitude within 1.0 ppm accuracy compared to TCCON, except in Europe, where the difference exceeds 1.0 ppm at two sites, and the amplitude captured by GOSAT/ACOS is generally shallower compared to TCCON. This bias over Europe is not as large for the other GOSAT retrieval algorithms (NIES v02.21, RemoTeC v2.35, UoL v5.1, and NIES PPD ... mehr


Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Jahr 2015
Sprache Englisch
Identifikator DOI: 10.5194/acp-15-13023-2015
ISSN: 1680-7316, 1680-7324
URN: urn:nbn:de:swb:90-AAA1101032374
KITopen ID: 110103237
HGF-Programm 12.03.01; LK 01
Erschienen in Atmospheric chemistry and physics
Band 15
Heft 22
Seiten 13023-13040
Lizenz CC BY 3.0 DE: Creative Commons Namensnennung 3.0 Deutschland
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