Retrieval of Surface Visibility Using Satellite-Based Aerosol Measurements

doi:10.13209/j.0479-8023.2019.124

Acta Scientiarum Naturalium Universitatis Pekinensis ›› 2020, Vol. 56 ›› Issue (2): 231-241.DOI: 10.13209/j.0479-8023.2019.124

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Retrieval of Surface Visibility Using Satellite-Based Aerosol Measurements

ZHANG Yan^1,2, LI Jing^1,†

1. Department of Atmospheric and Marine Sciences, School of Physics, Peking University, Beijing 100871 2. 92020 PLA Troops, Qingdao 266100

Received:2019-04-02 Revised:2019-05-15 Online:2020-03-20 Published:2020-03-20
Contact: LI Jing, E-mail: jing-li(at)pku.edu.cn

基于卫星气溶胶光学厚度反演地面能见度算法的研究

张岩^1,2, 李婧^1,†

1. 北京大学物理学院大气与海洋科学系, 北京 100871 2. 92020 部队, 青岛 266100

通讯作者: 李婧, E-mail: jing-li(at)pku.edu.cn
基金资助:
国家自然科学基金(41575018)资助

Abstract

Abstract:

In order to obtain the large scale spatial distribution of surface visibility, a novel technique is developed to convert satellite-retrieved aerosol optical depth (AOD) to surface visibility through aerosol scale height. Specifically, the aerosol scale height is calculated using the advanced optimal interpolation (OI) method by assimilating CALIPSO (Cloud-Aerosol Lidar and Infrared Pathfinder Satellite Observations) measurements into GEOS-Chem stimulation results. The assimilated analysis field is then combined with MODIS AOD to calculate surface visibility. Validation against ground observation in China shows that best monthly correlation between collocated satellite-retrieved visibility and surface visibility data is above 0.5. Reasonable agreement is also found in seasonal and spatial variability.

Key words: surface visibility, satellite retrieval, aerosol optical depth, aerosol scale height

摘要：

为了获得大范围的能见度空间分布信息, 提出一种把MODIS卫星气溶胶光学厚度陆面产品转化为地面能见度分布的反演算法。该算法以 CALIPSO卫星的气溶胶标高为更新观测值, 以GEOS-Chem模拟的气溶胶标高场为背景场, 通过最优插值的资料同化方法, 将两者整合成误差更小的气溶胶标高分析场, 然后通过气溶胶标高分析场, 把MODIS卫星气溶胶光学厚度转化为地面能见度。与中国地区地面气象多年观测资料的对比结果表明, 反演能见度与观测能见度之间, 点对点的月相关系数可达0.5以上, 两者多年的逐月变化趋势与地域分布形势较为一致。

关键词: 地面能见度, 卫星反演, 气溶胶光学厚度, 气溶胶标高

ZHANG Yan, LI Jing. Retrieval of Surface Visibility Using Satellite-Based Aerosol Measurements[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2020, 56(2): 231-241.

张岩, 李婧. 基于卫星气溶胶光学厚度反演地面能见度算法的研究[J]. 北京大学学报自然科学版, 2020, 56(2): 231-241.

[1]	REN Tong,GAO Ling,LI Chengcai,MAO Jietai,LI Wanbiao,SHI Guangming,YANG Dongwei,WANG Lei. Retrieval of Aerosol Optical Depth from Fengyun-2C Geostationary Satellite Observation: Theory and Implementation [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2011, 47(4): 636-646.
[2]	GUAN Jiaxin,LI Chengcai. Spatial Distributions and Changes of Aerosol Optical Depth over Eastern and Central China [J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2010, 46(2): 185-191.

Retrieval of Surface Visibility Using Satellite-Based Aerosol Measurements

基于卫星气溶胶光学厚度反演地面能见度算法的研究

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