Assessment of the impacts of cloud chemistry on surface SO2 and sulfate levels in typical regions of China
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Published:2023-07-19
Issue:14
Volume:23
Page:8021-8037
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ISSN:1680-7324
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Container-title:Atmospheric Chemistry and Physics
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language:en
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Short-container-title:Atmos. Chem. Phys.
Author:
Lu Jianyan, Gong Sunling, Zhang Jian, Chen JianminORCID, Zhang Lei, Zhou Chunhong
Abstract
Abstract. A regional online chemical weather model, Weather Research and Forecasting (WRF)/China Meteorological
Administration Unified Atmospheric Chemistry Environment (CUACE), is used to assess
the contributions of cloud chemistry to the SO2 and sulfate levels in
typical regions of China. Upon comparison with several time series of in situ
cloud chemical observations on Mountain Tai in Shandong Province of China,
the CUACE cloud chemistry scheme is found to reasonably reproduce the
observed cloud consumption of H2O2, O3, and SO2 and the
production of sulfate, and it is consequently used in the regional assessment
of a heavy pollution episode and monthly average of December 2016. During
the cloudy period in the heavy pollution episode, sulfate production increased by 60 %–95 % and SO2 production reduced by over 80 %. The cloud
chemistry mainly affects the middle and lower troposphere below 5 km as well
as within the boundary layer, and it contributes significantly to the SO2
reduction and sulfate production in central-east China. Among these four
typical regions in China, the Sichuan Basin (SCB) is the most affected by the
cloud chemistry, with an average SO2 abatement of about 1.0–10.0 ppb
and sulfate increase of about 10.0–70.0 µg m−3, followed by the Yangtze
River Delta (YRD) and the southeast of the North China Plain (NCP), where SO2
abatement is about 1.0–5.0 ppb and sulfate increase is about 10.0–30.0 µg m−3. However, the cloud chemistry contributions to the Pearl River
Delta (PRD) and the northwest of the NCP are not significant due to lighter
pollution and less water vapor than the other regions.
Funder
China Meteorological Administration Ministry of Science and Technology of the People's Republic of China
Publisher
Copernicus GmbH
Subject
Atmospheric Science
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