卫星高光谱大气CO2遥感反演精度地基验证研究

利用TCCON网站提供的北半球7个地面观测站CO₂干空气混合比（XCO₂）数据，对3种卫星反演的XCO₂产品进行了验证，包括SCIAMACHY产品、NIES-GOSAT产品和ACOS-GOSAT产品。结果表明：卫星CO₂遥感反演产品与地基遥感资料具有较一致的季节性周期变化，一年中月平均浓度最高值均出现在4月和5月，最低值均出现在8月和9月；相对于地面观测，3种卫星产品均低估了XCO₂；ACOS-GOSAT产品与NIES-GOSAT产品的精度大体相当，误差标准差分别为2.26×10^-6和2.27×10^-6；SCIAMACHY产品的精度略差，误差标准差为2.91×10^-6。

Study on the Validation of Atmospheric CO2 from Satellite Hyper Spectral Remote Sensing

Three total column dry-air mole fractions of CO₂ (XCO₂) products from satellite retrievals, including SCIAMACHY, NIES-GOSAT, and ACOS-GOSAT, in the Northern Hemisphere were validated by ground data from the Total Carbon Column Observing Network (TCCON). The results show that the satellite data show the same seasonal fluctuations with TCCON, in general with maximum in April or May and minimum in August or September. The three products all underestimate the XCO₂. The accuracy of the ACOS-GOSAT product is almost the same as the NIES-GOSAT product, and their mean standard deviations are 2.26×10^-6 and 2.27×10^-6 , respectively. The accuracy of the SCIAMACHY product is slightly lower, with mean standard deviation of 2.91×10^-6.