Measurements of Volatile Organic Compounds During the COVID-19 Lockdown in Changzhou, China
| Autor: | Liang Zhu, Andrew Jensen, Joost A. de Gouw, Abigail R. Koss, Barbara Dix, Wen Tan, Tianshu Chen, Li Li, Zhiqiang Liu |
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| Rok vydání: | 2021 |
| Předmět: |
Atmospheric Science
Coronavirus disease 2019 (COVID-19) Pollution: Urban Regional and Global Megacities and Urban Environment Transportation Atmospheric Composition and Structure Biogeosciences Oceanography: Biological and Chemical Paleoceanography COVID‐19 volatile organic compounds Research Letter Industry China Urban Systems Aerosols Marine Pollution Aerosols and Particles Oceanography: General Geophysics Pollution: Urban and Regional Emissions Environmental chemistry General Earth and Planetary Sciences Environmental science Troposphere: Composition and Chemistry The COVID‐19 pandemic: linking health society and environment Natural Hazards |
| Zdroj: | Geophysical Research Letters |
| ISSN: | 0094-8276 |
| Popis: | 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 showed different responses to the lockdown, so emissions from the industrial sector should not be scaled uniformly. The quantified changes in VOCs due to the lockdowns constrain emission inventories and inform chemistry‐transport models, particularly for sectors where activity data are sparse, as the effects of lockdowns on air quality are explored. Key Points We measured and quantified volatile organic compounds (VOCs) in Changzhou, China during the COVID‐19 lockdownsTraffic‐related VOC emissions were reduced by 70%, which agrees with reductions in traffic countsTextile and pharmaceutical industry VOC emissions responded differently, so industrial emissions should not be scaled uniformly |
| Databáze: | OpenAIRE |
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