Measurements of Volatile Organic Compounds During the COVID‐19 Lockdown in Changzhou, China Geophysical Research Letters
收藏NOAA Institutional Repository2023-09-12 更新2026-04-25 收录
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https://doi.org/10.1029/2021gl095560
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资源简介：
The COVID-19 outbreak in 2020 prompted strict lockdowns, reduced human activity, and reduced emissions of air pollutants. We measured volatile organic compounds (VOCs) using a proton- transfer-reaction mass spectrometry instrument in Changzhou, China from 8 January through 27 March, including periods of pre-lockdown, strict measures (level 1), and more relaxed measures (level 2). We analyze the data using positive matrix factorization and resolve four factors: textile industrial emissions (62 ± 10% average reduction during level 1 relative to pre-lockdown), pharmaceutical industrial emissions (40 ± 20%), traffic emissions (71 ± 10%), and secondary chemistry (20 ± 20%). The two industrial sources
提供机构：
NOAA
创建时间：
2023-09-12
