Journal of Atmospheric and Environmental Optics ›› 2017, Vol. 12 ›› Issue (6): 435-445.

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Accuracy Evaluation of FY-3A/MERSI Aerosol Optical Depth Data in Beijing and Its Adjacent Region

TANG Weiyao1,2, BAO Yansong1,2, MA Xiao3, XU Xu3, XU Junjie2, LI Ran2,GUO Bin2, ZHU Liuhua2, WANG Futing2   

  1. (1 Key Laboratory of Meteorological Disaster, Ministry of Education/Joint International Research Laboratory of Climate and Environment Change/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters/Key Laboratory of the China Meteorological Administration Aerosol and Cloud Precipitation, Nanjing University of Information Science and Technology, Nanjing 210044, China; 
    2 School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing 210044, China; 
    3 School of Atmospheric Science, Nanjing University of Information Science and Technology, Nanjing 210044, China)
  • Online:2017-11-28 Published:2017-11-13
  • Supported by:

    Supported by Six Talent Peaks Project in Jiangsu Province 455(江苏省“六大人才高峰”高层次人才项目, 2015-JY-013), College Student Practice Innovative Training Program of Jiangsu Province(江苏省大学生创新创业训练计划项目, 201510300047), Techno Solutions College Students Scientific Innovative Program of NUIST Atmospheric Physics School(南京信息工程大学大气物理学院天诺基金, 2015TNJY012)

Abstract:

Automatic aerosol observation network (AERONET) and FY-3A Moderate Resolution Imaging Spectrometer (FY3A-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 its 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 product in northern China.

Key words: medium resolution spectral imager, aerosol optical depth, aerosol robotic network, algorithm of dark target

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