Preprints
https://doi.org/10.5194/acp-2022-27
https://doi.org/10.5194/acp-2022-27
 
25 Jan 2022
25 Jan 2022
Status: a revised version of this preprint was accepted for the journal ACP and is expected to appear here in due course.

Climate impacts of emission reductions in China during 2013–2017

Jiyuan Gao1, Yang Yang1, Hailong Wang2, Pinya Wang1, Huimin Li1, Mengyun Li1, Lili Ren1, Xu Yue1, and Hong Liao1 Jiyuan Gao et al.
  • 1Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, Jiangsu, China
  • 2Atmospheric Sciences and Global Change Division, Pacific Northwest National Laboratory, Richland, Washington, USA

Abstract. China has implemented a sequence of policies for clean air since year 2013 and the aerosol pollution has been substantially improved, but ozone (O3) related issues arose. Here, climate responses to changes in aerosols and O3 related to the emission reductions 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° N–40° N, 110° E–122.5° E), which is further enhanced by the increase in O3 in the lower troposphere, resulting in an accelerated 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. It implies that switching residential sector to cleaner energy is more effective to achieve climate and health co-benefits in China.

Jiyuan Gao et al.

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-27', Anonymous Referee #1, 16 Feb 2022
  • RC2: 'Comment on acp-2022-27', Anonymous Referee #2, 21 Feb 2022

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on acp-2022-27', Anonymous Referee #1, 16 Feb 2022
  • RC2: 'Comment on acp-2022-27', Anonymous Referee #2, 21 Feb 2022

Jiyuan Gao et al.

Jiyuan Gao et al.

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Short summary
The aerosol decline produced a 0.09 ± 0.10 °C warming estimated in this study and the increase of ozone in the lower troposphere accelerated the warming, leading to a total 0.16 ± 0.15 °C temperature increase in eastern China during 2013–2017. Residential emissions reductions led to a cooling effect because a substantial decrease in light-absorbing aerosols.
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