Improving atmospheric CO 2 retrieval based on the collaborative use of Greenhouse gases Monitoring Instrument and Directional Polarimetric Camera sensors on Chinese hyperspectral satellite GF5-02
Geo-spatial Information Science, vol. 27, pp. 572–584
Abstract
The Greenhouse Gas Monitoring Instrument (GMI) onboard the Chinese hyperspectral satellite GF5–02 can provide abundant observations of global atmospheric CO2, which plays an important role in climate research. CO2 retrieval precision is the key to determining the application value of the GMI. To reduce the influence of atmospheric scattering on retrieval, we combined the Directional Polarimetric Camera (DPC) data on the same satellite to improve the anti-interference ability of GMI CO2 retrieval and ensure its retrieval precision. To realize the reliability and feasibility of the collaborative use of the GMI and DPC, this paper designs the pointing registration method of the GMI based on coastline observations, the spatial resolution matching method and the collaborative cloud screening method of the GMI and DPC observations. Combined with the DPC, which supplied the spectral data and aerosol product, the retrieval ability of the coupled bidirectional reflectance distribution function CO2 retrieval (CBCR) method developed for GMI CO2 retrieval was improved, with the retrieval efficiency of CO2 products increasing by 27%, and the CO2 retrieval precision increasing from 3.3 ppm to 2.7 ppm. Moreover, collaborative use not only guaranteed the GMI’s ability to detect global and area CO2 concentration distribution characteristics, such as significant concentration differences between the Northern and Southern Hemispheres in winter and high CO2 concentrations in urban agglomeration areas caused by human activities, but also extended the GMI’s potential for monitoring anomalous events, such as the Tonga volcanic eruption.
Authors 10
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Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
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Hailiang Shi corresponding
Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
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Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
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University of Science and Technology of China · Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
Science Island Branch, Graduate School of University of Science and Technology of China, Hefei, China
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University of Science and Technology of China · Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
Science Island Branch, Graduate School of University of Science and Technology of China, Hefei, China
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University of Science and Technology of China · Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
Science Island Branch, Graduate School of University of Science and Technology of China, Hefei, China
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Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
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Chinese Academy of Sciences · Hefei Institutes of Physical Science
Affiliation as printed
Key Laboratory of General Optical Calibration and Characterization Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, China
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Chinese Academy of Sciences · Aerospace Information Research Institute
Affiliation as printed
State Environmental Protection Key Laboratory of Satellite Remote Sensing, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing, China
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Space Research Organisation Netherlands
Affiliation as printed
Netherlands Institute for Space Research (NWO), Utrecht, Netherlands
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