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A New TanSat XCO2 Global Product towards Climate Studies

Abstract

The 1st Chinese carbon dioxide (CO2) monitoring satellite mission, TanSat, was launched in 2016. The 1st TanSat global map of CO2 dry-air mixing ratio (XCO2) measurements over land was released as version 1 data product with an accuracy of 2.11 ppmv (parts per million by volume). In this paper, we introduce a new (version 2) TanSat global XCO2 product that is approached by the Institute of Atmospheric Physics Carbon dioxide retrieval Algorithm for Satellite remote sensing (IAPCAS), and the European Space Agency (ESA) Climate Change Initiative plus (CCI+) TanSat XCO2 product by University of Leicester Full Physics (UoL-FP) retrieval algorithm. The correction of the measurement spectrum improves the accuracy (@#@0.08 ppmv) and precision (1.41 ppmv) of the new retrieval, which provides opportunity for further application in global carbon flux studies in the future. Inter-comparison between the two retrievals indicates a good agreement, with a standard deviation of 1.28 ppmv and a bias of −0.35 ppmv.

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Acknowledgements

This work was supported by the National Key R&D Program of China (Grant No. 2016YFA0600203), the Key Research Program of the Chinese Academy of Sciences (Grant No. ZDRW-ZS-2019-1), the International Partnership Program of the Chinese Academy of Sciences (Grant No. GJHZ201903), the National Natural Science Foundation of China (Grant No. 41905029), ESA Climate Change Initiative CCI+ (GhG theme), Earthnet Data Assessment Pilot (EDAP) project and ESA-MOST Dragon-4 programme (ID 32301). HB is supported by the UK NERC National Centre for Earth Observation (NCEO) (Grant Nos. nceo020005 and NE/N018079/1). The TanSat L1B data service is provided by IRCSD and CASA (131211KYSB20180002). We also thank the Fengyun Satellite Data Center of the National Satellite Meteorological Center, who provide the TanSat L1B data service. This research used the ALICE High Performance Computing Facility at the University of Leicester. The authors thank the TanSat mission, and the support from everyone involved with the TanSat mission is highly appreciated.

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Correspondence to Yi Liu or Hartmut Boesch.

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Yang, D., Liu, Y., Boesch, H. et al. A New TanSat XCO2 Global Product towards Climate Studies. Adv. Atmos. Sci. 38, 8–11 (2021). https://doi.org/10.1007/s00376-020-0297-y

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Key words

  • TanSat
  • CO2
  • remote sensing
  • carbon flux
  • climate change