Climate responses in China to domestic and foreign aerosol changes due to clean air actions during 2013–2019

Jiyuan Gao, Yang Yang*, Hailong Wang, Pinya Wang, Baojie Li, Jiandong Li, Jiangfeng Wei, Meng Gao, Hong Liao

*Corresponding author for this work

Research output: Contribution to journalJournal articlepeer-review

Abstract

In recent years, to improve air quality, significant efforts have been made to reduce regional aerosols including China, Europe and North America, which have potential impacts on climate. In this study, fast and slow climate responses in China to changes in domestic and foreign anthropogenic emissions of aerosols and precursors from 2013 to 2019 are investigated using the Community Earth System Model version 1 (CESM1). Aerosol emissions changes, especially reductions in China, North America and Europe, during 2013–2019 resulted in surface air temperature increases across the Northern Hemisphere. Global aerosol changes induce a regional warming of 0.2 °C in China, equally contributed by domestic and foreign emissions changes. China’s domestic emission reductions lead to a regional average temperature rise of 0.1°C, primarily driven by rapid atmospheric adjustments over eastern China. Foreign aerosol changes, particularly reductions in North America and Europe, also contributed to a 0.1°C warming in China through slow oceanic processes. This warming in China induced by foreign aerosol changes is due to a teleconnection between the aerosol-induced anomalous regional warming in Eastern U.S.-North Atlantic Ocean-Europe and the downstream East Asian climate through anomalous wave trains propagation. The comparable influence of domestic and foreign aerosol changes on climate in China underscores the importance of international collaboration in climate mitigation endeavors.

Original languageEnglish
Article number160
Number of pages10
Journalnpj Climate and Atmospheric Science
Volume6
Issue number1
Early online date4 Oct 2023
DOIs
Publication statusPublished - Dec 2023

Scopus Subject Areas

  • Global and Planetary Change
  • Environmental Chemistry
  • Atmospheric Science

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