典型文献
First Chinese ultraviolet–visible hyperspectral satellite instrument implicating global air quality during the COVID-19 pandemic in early 2020
文献摘要：
In response to the COVID-19 pandemic, governments worldwide imposed lockdown measures in early 2020, resulting in notable reductions in air pollutant emissions. The changes in air quality during the pandemic have been investigated in numerous studies via satellite observations. Nevertheless, no relevant research has been gathered using Chinese satellite instruments, because the poor spectral quality makes it extremely difficult to retrieve data from the spectra of the Environmental Trace Gases Monitoring Instrument (EMI), the first Chinese satellite-based ultraviolet–visible spectrometer monitoring air pollutants. However, through a series of remote sensing algorithm optimizations from spectral calibration to retrieval, we successfully retrieved global gaseous pollutants, such as nitrogen dioxide (NO2), sulfur dioxide (SO2), and formaldehyde (HCHO), from EMI during the pandemic. The abrupt drop in NO2 successfully captured the time for each city when effective measures were implemented to prevent the spread of the pandemic, for example, in January 2020 in Chinese cities, February in Seoul, and March in Tokyo and various cities across Europe and America. Furthermore, significant decreases in HCHO in Wuhan, Shanghai, Guangzhou, and Seoul indicated that the majority of volatile organic compounds (VOCs) emissions were anthropogenic. Contrastingly, the lack of evident reduction in Beijing and New Delhi suggested dominant natural sources of VOCs. By comparing the relative variation of NO2 to gross domestic product (GDP), we found that the COVID-19 pandemic had more influence on the secondary industry in China, while on the primary and tertiary industries in Korea and the countries across Europe and America.
文献关键词：
中图分类号：
作者姓名：
Cheng Liu;Qihou Hu;Chengxin Zhang;Congzi Xia;Hao Yin;Wenjing Su;Xiaohan Wang;Yizhou Xu;Zhiguo Zhang
作者机构：
Department of Precision Machinery and Precision Instrumentation,University of Science and Technology of China,230026 Hefei,China;Key Laboratory of Environmental Optics and Technology,Anhui Institute of Optics and Fine Mechanics,Hefei Institutes of Physical Science,Chinese Academy of Sciences,230031 Hefei,China;Center for Excellence in Regional Atmospheric Environment,Institute of Urban Environment,Chinese Academy of Sciences,361021 Xiamen,China;Key Laboratory of Precision Scientific Instrumentation of Anhui Higher Education Institutes,University of Science and Technology of China,230026 Hefei,China;School of Earth and Space Sciences,University of Science and Technology of China,230026 Hefei,China;Department of Environmental Science and Engineering,University of Science and Technology of China,230026 Hefei,China
文献出处：
引用格式：
[1]Cheng Liu;Qihou Hu;Chengxin Zhang;Congzi Xia;Hao Yin;Wenjing Su;Xiaohan Wang;Yizhou Xu;Zhiguo Zhang-.First Chinese ultraviolet–visible hyperspectral satellite instrument implicating global air quality during the COVID-19 pandemic in early 2020)[J].光：科学与应用（英文版）,2022(02):242-253
A类：
Contrastingly
B类：
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AB值：
0.623927
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机标中图分类号，由域田数据科技根据网络公开资料自动分析生成，仅供学习研究参考。
