Assessment of aerosol models to AOD retrieval from HJ1 Satellites
Assessment of aerosol models to AOD retrieval from HJ1 Satellites
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DOI：
10.1088/1755-1315/17/1/012006
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发表时间：
2014-03
期刊：
影响因子：
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通讯作者：
Yuhuan Zhang;Zhengqiang Li;Weizhen Hou;Li Donghui 1;Zhang Ying;Ma Yan
中科院分区：
文献类型：
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作者：
Yuhuan Zhang;Zhengqiang Li;Weizhen Hou;Li Donghui 1;Zhang Ying;Ma Yan
中国环境卫星hj1a和hj1b具有较高的时空分辨率，可以在气溶胶反演中发挥重要作用。目前基于HJ1-CCD的气溶胶光学深度（AOD）反演方法几乎都是基于LUT (lookup Table)，通过选择最佳拟合结果来确定AOD。然而，在建立查找表时，气溶胶模式的选择对检索结果有重要影响；气溶胶模式选择不当将严重影响方法的准确性和适用性。本文根据观测资料确定了局地气溶胶的物理性质（如复折射率、粒径分布等），从而确定了局地气溶胶的类型，反演了局地气溶胶的AOD。此外，我们还比较了辐射传输模型中测量气溶胶模型与固有气溶胶模型的反演结果，并评价了其对气溶胶类型的影响。
The Chinese environmental satellites HJ1 A and B can play a significant role in the aerosol retrieval due to their high spatial and temporal resolution. The current Aerosol Optical Depth (AOD) retrieval methods from HJ1-CCD are almost based on the LUT (Look-Up Table), by selecting the best fitting result to determine the AOD. However, aerosol model selection has an important impact on the retrieval results when creating the lookup table; inappropriate choice of aerosol model will significantly affect the accuracy and applicability of the method. This paper determined the local aerosol physical properties (such as complex refractive index, and size distribution) based on the observational data, thus we defined the aerosol type and retrieved the AOD of the local aerosol. Furthermore we compared the results retrieved from the measurement aerosol model with those retrieved from the inherent aerosol model in the radiative transfer model and then evaluate its effect on the aerosol type.