基于DPC/GF-5（02）的气溶胶光学微物理特性监测——以华北平原沙尘事件为例

IF 4.2 2区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Atmospheric Environment Pub Date : 2025-03-25 DOI:10.1016/j.atmosenv.2025.121193

Yujia Cao , Cheng Chen , Haixiao Yu , Xiaobing Sun , Xiao Liu , Haoran Gu , Yisong Xie , Jin Hong , Zhengqiang Li

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引用次数: 0

摘要

大气气溶胶是大气的重要组成部分，具有显著的辐射强迫影响。气溶胶影响着辐射传输、能量循环、气候变化和地球-大气相互作用等过程，与环境保护和人类健康有着千丝万缕的联系。粉尘气溶胶作为以粗模为主的吸收粒子，对气候的影响复杂（短波降温、长波升温），容易引起人类呼吸系统疾病。本文将大气与地表特性广义检索（GRASP）算法应用于中国高分五号（02）卫星上的定向偏振相机（DPC）测量，该算法支持同时检索来自不同来源和水平的多个气溶胶光学和微物理参数。获得了2023年4 ~ 6月京津冀地区气溶胶的光学和微物理特性，并对一次沙尘事件进行了跟踪。结果表明，DPC/GRASP方法能够反演京津冀地区气溶胶光学和微物理特性，且与AERONET高度相关，可用于识别沙尘天气的演变过程。为今后整合各种气溶胶观测平台数据高效、准确地获取大面积气溶胶光学和微物理特性提供了新的方法和流程方案，并为研究沙尘天气演变和沙尘气溶胶扩散提供了新的参考。

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Monitoring of aerosol optical-microphysical properties from DPC/GF-5(02): A case study of dust event in north China plain

Atmospheric aerosol is an essential component of the atmosphere, with a significant radiative forcing impact. Aerosol influences the processes of radiation transmission, energy cycle, climate change and Earth-atmosphere interaction, and it is inextricably linked to environmental protection and human health. As coarse mode dominant absorptive particles, dust aerosol has a complex effect on climate (cooling in shortwave and warming in longwave) and is easy to cause human respiratory diseases. In this study, the Generalized Retrieval of Atmosphere and Surface Properties (GRASP) algorithm, which supports simultaneous retrieval of multiple aerosol optical and microphysical parameters with measurements from different sources and levels, is applied to the Directional Polarimetric Camera (DPC) measurements on board the Chinese Gaofen-5 (02) satellite. The optical and microphysical properties of aerosols in the Beijing-Tianjin-Hebei region from April to June in 2023 are obtained, and a dust event is tracked. The results show that DPC/GRASP method is capable to retrieve aerosol optical and microphysical properties in the Beijing-Tianjin-Hebei region, and is highly correlated with AERONET, and can be used to identify the evolution process of dust weather. It provides a new method and process scheme for the efficient and accurate acquisition of aerosol optical and microphysical properties in large areas by integrating various aerosol observation platform data in the future, and provides a new reference for the study of the evolution of dust weather and the diffusion of dust aerosol.

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来源期刊

Atmospheric Environment 环境科学-环境科学

CiteScore

9.40

自引率

8.00%

发文量

458

审稿时长

53 days

期刊介绍： Atmospheric Environment has an open access mirror journal Atmospheric Environment: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review. Atmospheric Environment is the international journal for scientists in different disciplines related to atmospheric composition and its impacts. The journal publishes scientific articles with atmospheric relevance of emissions and depositions of gaseous and particulate compounds, chemical processes and physical effects in the atmosphere, as well as impacts of the changing atmospheric composition on human health, air quality, climate change, and ecosystems.