期刊
ATMOSPHERIC MEASUREMENT TECHNIQUES
卷 10, 期 6, 页码 2209-2238出版社
COPERNICUS GESELLSCHAFT MBH
DOI: 10.5194/amt-10-2209-2017
关键词
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资金
- NASA
- EU project InGOS
- EU project ICOS-INWIRE
- Senate of Bremen
- NASA [NAG512247, NNG05GD07G, NNX14AI60G, NNX11AG01G, NAG5-12247, NNG05-GD07G]
- Australian Research Council [DP140101552, DP110103118, DP0879468, LE0668470, LP0562346, DE140100178]
- Royal Belgian Institute for Space Aeronomy under EU project ICOS-Inwire and ministerial decree for ICOS [FR/35/IC2]
- Universite de La Reunion [LACy/UMR8105]
- NASA's Orbiting Carbon Observatory Program
- New Zealand Foundation of Research Science and Technology [CO1X0204, CO1X0703, CO1X0406]
- NIWA's Atmosphere Research Programme [3 (2011/13)]
- Atlantic Innovation Fund/Nova Scotia Research Innovation Trust
- Canada Foundation for Innovation
- Canadian Foundation for Climate and Atmospheric Sciences
- Canadian Space Agency
- Environment Canada
- Government of Canada
- Natural Sciences and Engineering Research Council
- Northern Scientific Training Program
- Ontario Innovation Trust
- Ontario Research Fund
- Polar Continental Shelf Program
- DOE OBER's TES
- NGEE-Tropics program
- Australian Research Council [DE140100178] Funding Source: Australian Research Council
NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dryair mole fraction, X-CO2, in the Earth's atmosphere for over 2 years. In this paper, we describe the comparisons between the first major release of the OCO-2 retrieval algorithm (B7r) and X-CO2 from OCO-2's primary ground-based validation network: the Total Carbon Column Observing Network (TCCON). The OCO-2 X-CO2 retrievals, after filtering and bias correction, agree well when aggregated around and coincident with TCCON data in nadir, glint, and target observation modes, with absolute median differences less than 0.4 ppm and RMS differences less than 1.5 ppm. After bias correction, residual biases remain. These biases appear to depend on latitude, surface properties, and scattering by aerosols. It is thus crucial to continue measurement comparisons with TCCON to monitor and evaluate the OCO-2 X-CO2 data quality throughout its mission.
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