大气与环境光学学报, 2017, 12 (6): 435, 网络出版: 2017-12-04
FY-3A/MERSI气溶胶光学厚度资料在北京及其周围地区的精度评价
Accuracy Evaluation of FY-3A/MERSI Aerosol Optical Depth Data in Beijing and Its Adjacent Region
气溶胶光学厚度 气溶胶自动观测网 暗像元算法 medium resolution spectral imager MERSI aerosol optical depth aerosol robotic network algorithm of dark target
摘要
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。
Abstract
Automatic aerosol observation network (AERONET) and FY-3A Moderate Resolution Imaging Spectrometer (FY-3A/MERSI) are matched by utilizing the method of band interpolation and temporal-spatial matching. The inversion precision of FY-3A/MERSI AOD products in Beijing, China and adjacent regions is verified and analyzed by using AERONET AOD data. The results show: (1) FY-3A AOD data presents a high relativity (R=0.733) with AERONET AOD data and generally less than it (bias=-0.012). (2) The higher the underlying surface vegetation coverage is, the higher the FY-3A AOD data retrieving accuracy is, and the accuracy in winter-spring season is higher than that in summer-autumn season. Also, the retrieval precision is greater in low aerosol concentration condition. The above conclusions can provide reference for the application of FY-3A/MERSI aerosol products in northern China.
唐维尧, 鲍艳松, 马骁, 徐徐, 徐俊杰, 李冉, 郭斌, 朱柳桦, 王富婷. FY-3A/MERSI气溶胶光学厚度资料在北京及其周围地区的精度评价[J]. 大气与环境光学学报, 2017, 12(6): 435. TANG Weiyao, BAO Yansong, MA Xiao, XU Xu, XU Junjie, LI Ran, GUO Bin, ZHU Liuhua, WANG Futing. Accuracy Evaluation of FY-3A/MERSI Aerosol Optical Depth Data in Beijing and Its Adjacent Region[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(6): 435.