EMI 云量反演及与TROPOMI 的对比研究

大气与环境光学学报 ›› 2021, Vol. 16 ›› Issue (3): 223-230.

• “高分五号卫星大气数据反演”专辑 • 上一篇下一篇

EMI 云量反演及与TROPOMI 的对比研究

杨太平, 司福祺∗, 周海金, 赵敏杰, 罗宇涵, 刘建国

中国科学院合肥物质科学研究院安徽光学精密机械研究所, 中国科学院环境光学与技术重点实验室, 安徽合肥 230031

收稿日期:2020-10-28 修回日期:2021-01-27 出版日期:2021-05-28 发布日期:2021-05-28
通讯作者: E-mail: sifuqi@aiofm.ac.cn E-mail:sifuqi@aiofm.ac.cn
作者简介:杨太平 (1992 - ), 女, 重庆奉节人, 博士, 助理研究员, 主要从事痕量气体反演、卫星数据反演方面的研究。 E-mail: tpyang@aiofm.ac.cn
基金资助:
Supported by National Key Research and Development Project (国家重点研发计划, 2017YFB0503901)

Cloud Fraction Retrieval of EMI and Comparison With TROPOMI

Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Key Laboratory of Environmental Optics and Technology, Anhui Institute of Optics and Fine Mechanics, HFIPS, Chinese Academy of Sciences, Hefei 230031, China

Received:2020-10-28 Revised:2021-01-27 Published:2021-05-28 Online:2021-05-28

摘要/Abstract

摘要： 云参数是痕量气体反演过程中重要的输入参数, 对其准确反演具有重要意义。基于 2019 年 3 月大气痕量气体差分吸收光谱仪 EMI 的观测数据, 利用 O4 在 477 nm 处的吸收特性进行有效云量的反演。为验证 EMI 云量反演的准确性, 将 EMI 与 TROPOMI 的反演结果进行对比分析, 并对 2019 年 3 月 2 日、 6 日、 9 日和 10 日 EMI 和 TROPOMI 整天的云量进行了相关性分析, 相关性 R 分别为 0.752、 0.712、 0.764 和 0.762, 表明二者具有良好的相关性。进一步选取了沙漠、海洋、陆地三个不同区域的云量分析了不同下垫面情况云量的分布特征, 发现在这三个区域, EMI 和 TROPOMI 的云量都具有较好的一致性, 并且海洋上空云量较低, 陆地上空云量较高, 而沙漠上空云量变化频繁。

关键词: 云, 大气痕量气体差分吸收光谱仪, 有效云量, TROPOMI

Abstract: As cloud parameters are important input parameters for retrieval of trace gases, it is of great significance for their accurate acquisition. Based on environmental trace gas monitoring instrument (EMI) observation on March 2019, the effective cloud fraction is retrieved by using the absorption feature of O4 at 477 nm. To verify the accuracy of EMI cloud algorithm, the retrieval cloud fraction of EMI is compared with TROPOMI cloud products, and the correlation analysis of EMI and TROPOMI cloud fraction on March 2, 6, 9 and 10, 2019 is carried out, and the cloud fraction correlation coefficient (R) is 0.752, 0.712, 0.764, and 0.762 respectively, indicating that the two results have good correlation. Furthermore, the cloud fractions of three different regions of desert, ocean, and land are selected to study the distribution characteristics of cloud fraction in different underlying surface. It is found that the cloud fractions of EMI and TROPOMI in the three regions are consistent, and the cloud fraction over the ocean is relatively low, the cloud fraction over the land is relatively high, and the cloud fraction over the desert changes frequently.

Key words: cloud, environmental trace gas monitoring instrument, effective cloud fraction, TROPOMI

中图分类号:

X87
X511

杨太平, 司福祺∗, 周海金, 赵敏杰, 罗宇涵, 刘建国. EMI 云量反演及与TROPOMI 的对比研究[J]. 大气与环境光学学报, 2021, 16(3): 223-230.

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杨太平, 司福祺, PingWang, 等. 大气痕量气体差分吸收光谱仪云量反演算法研究[J]. 光学学报, 2020, 40(9): 0901001

EMI 云量反演及与TROPOMI 的对比研究

Cloud Fraction Retrieval of EMI and Comparison With TROPOMI

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