Journal Article
Atmospheric Chemistry and Physics, vol. 22, iss. 11, pp. 7131-7142, 2022
Authors
Jiyuan Gao, Yang Yang, Hailong Wang, Pinya Wang, Huimin Li, Mengyun Li, Lili Ren, Xu Yue, Hong Liao
Abstract
Abstract. 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.
