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采用波长插值和时空匹配的方法,对气溶胶自动观测网(aerosol robotic network,AERONET)和风云三号卫星中分辨率光谱成像仪(FY-3A/MERSI)气溶胶光学厚度(aerosol optical depth,AOD)产品进行匹配,并进一步使用AERONET AOD数据对北京以及周围地区的FY-3A/MERSI AOD产品精度进行验证分析。实验结果表明:(1)FY-3A AOD与AERONET AOD具有较高的相关性(R=0.733),总体偏低于AERONET AOD(bias=-0.012);(2)下垫面植被覆盖度越高,FY-3A AOD反演精度越高;气溶胶浓度较低精度越高,反之反演精度越低;并且在春冬季节的反演精度高于夏秋季节。此结论可为北方地区的FY-3A/MERSI气溶胶产品使用提供参考。
The aerosol optical depth (AOD) of Aerosol robotic network (AERONET) and FY-3A / MERSI aerosol optical depth (AOD) ) Products and further validate the accuracy of FY-3A / MERSI AOD products in Beijing and surrounding areas using AERONET AOD data. The experimental results show that: (1) FY-3A AOD has a high correlation with AERONET AOD (R = 0.733), which is generally lower than AERONET AOD (bias = -0.012); (2) , FY-3A AOD inversion accuracy is higher; lower aerosol concentration accuracy is higher, on the contrary the inversion accuracy is lower; and in spring and winter retrieval accuracy is higher than summer and autumn. This conclusion may provide a reference for the use of FY-3A / MERSI aerosol products in the northern region.