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Fast climate responses to emission reductions in aerosol and ozone precursors in China during 2013-2017

Journal Article · · Atmospheric Chemistry and Physics (Online)
China has been implementing a sequence of policies for clean air since the year 2013, and the aerosol pollution has been substantially improved, but ozone (O3)-related issues arose. Here, fast climate responses to emission reductions in aerosol and O3 precursors over China during 2013–2017 are investigated using the Community Earth System Model version 2 (CESM2). The overall decreases in aerosols produced an anomalous warming of 0.09 ± 0.10°C in eastern China (22–40° N, 110–122.5° E), which is further intensified by the increase in O3 in the lower troposphere, resulting in an enhanced warming of 0.16 ± 0.15° C in eastern China. Reductions in industrial emissions contributed the most to the aerosol-induced warming, while emission reductions from residential sector induced a cooling effect due to a substantial decrease in light-absorbing black carbon aerosols. This implies that switching the residential sector to cleaner energy is more effective to achieve climate and health benefits in China.
Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
Sponsoring Organization:
Jiangsu Science Fund for Distinguished Young Scholars; National Key Research and Development Program of China; National Natural Science Foundation of China; USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC05-76RL01830
OSTI ID:
1874219
Report Number(s):
PNNL-SA-174008
Journal Information:
Atmospheric Chemistry and Physics (Online), Journal Name: Atmospheric Chemistry and Physics (Online) Journal Issue: 11 Vol. 22; ISSN 1680-7324
Publisher:
Copernicus Publications, EGUCopyright Statement
Country of Publication:
United States
Language:
English

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