Widespread 2013-2020 decreases and reduction challenges of organic aerosol in China

Qi Chen (), Ruqian Miao, Guannan Geng, Manish Shrivastava, Xu Dao, Bingye Xu, Jiaqi Sun, Xian Zhang, Mingyuan Liu, Guigang Tang, Qian Tang, Hanwen Hu, Ru-Jin Huang, Hao Wang, Yan Zheng, Yue Qin, Song Guo, Min Hu and Tong Zhu
Additional contact information
Qi Chen: Peking University
Ruqian Miao: Peking University
Guannan Geng: Tsinghua University
Manish Shrivastava: Pacific Northwest National Laboratory
Xu Dao: China National Environmental Monitoring Centre
Bingye Xu: Zhejiang Province Environment Monitoring Centre
Jiaqi Sun: China National Environmental Monitoring Centre
Xian Zhang: China National Environmental Monitoring Centre
Mingyuan Liu: China National Environmental Monitoring Centre
Guigang Tang: China National Environmental Monitoring Centre
Qian Tang: Zhejiang Province Environment Monitoring Centre
Hanwen Hu: Tsinghua University
Ru-Jin Huang: Chinese Academy of Sciences
Hao Wang: Peking University
Yan Zheng: Peking University
Yue Qin: Peking University
Song Guo: Peking University
Min Hu: Peking University
Tong Zhu: Peking University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract High concentrations of organic aerosol (OA) occur in Asian countries, leading to great health burdens. Clean air actions have resulted in significant emission reductions of air pollutants in China. However, long-term nation-wide trends in OA and their causes remain unknown. Here, we present both observational and model evidence demonstrating widespread decreases with a greater reduction in primary OA than in secondary OA (SOA) in China during the period of 2013 to 2020. Most of the decline is attributed to reduced residential fuel burning while the interannual variability in SOA may have been driven by meteorological variations. We find contrasting effects of reducing NOx and SO2 on SOA production which may have led to slight overall increases in SOA. Our findings highlight the importance of clean energy replacements in multiple sectors on achieving air-quality targets because of high OA precursor emissions and fluctuating chemical and meteorological conditions.

Date: 2024
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DOI: 10.1038/s41467-024-48902-0

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