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Atmosphere 2016, 7(9), 109; doi:10.3390/atmos7090109

Intercomparison of Carbon Dioxide Products Retrieved from GOSAT Short-Wavelength Infrared Spectra for Three Years (2010–2012)

1
Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, 20A North Datun Road, Beijing 100101, China
2
School of Surveying and Land Information Engineering, Henan Polytechnic University, 2001 Century Road, Jiaozuo 454000, China
3
University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
*
Author to whom correspondence should be addressed.
Academic Editor: Robert W. Talbot
Received: 28 July 2016 / Revised: 17 August 2016 / Accepted: 18 August 2016 / Published: 23 August 2016
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Abstract

This paper presents the comparison of two CO2 datasets from the National Institute for Environmental Studies (NIES) of Japan and the Atmospheric CO2 Observations from Space (ACOS) of NASA for three years (2010 to 2012). Both CO2 datasets are retrieved from the Greenhouse gases Observing SATellite (GOSAT) short-wavelength infrared spectra over High gain surface land. In this three-year period, the yield of the NIES CO2 column averaged dry air mole fractions (XCO2) is about 71% of ACOS retrievals. The overall bias is 0.21 ± 1.85 ppm and −0.69 ± 2.13 ppm for ACOS and NIES XCO2, respectively, when compared with ground-based Fourier Transform Spectrometer (FTS) observations from twelve Total Carbon Column Observing Network (TCCON) sites. The differences in XCO2 three-year means and seasonal means are within about 1 to 2 ppm. Strong consistency is obtained for the ACOS and NIES XCO2 monthly averages time series over different regions, with the greatest mean difference of ACOS to NIES monthly means over China (1.43 ± 0.60 ppm) and the least over Brazil (−0.03 ± 0.64 ppm). The intercomparison between the two XCO2 datasets indicates that the ACOS XCO2 is globally higher than NIES by about 1 ppm and has smaller bias and better consistency than NIES data. View Full-Text
Keywords: atmospheric CO2; GOSAT; ACOS; comparison; difference atmospheric CO2; GOSAT; ACOS; comparison; difference
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Deng, A.; Yu, T.; Cheng, T.; Gu, X.; Zheng, F.; Guo, H. Intercomparison of Carbon Dioxide Products Retrieved from GOSAT Short-Wavelength Infrared Spectra for Three Years (2010–2012). Atmosphere 2016, 7, 109.

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