Coarse particulate matter air quality in East Asia: implications for fine particulate nitrate
Abstrak
Coarse particulate matter (PM) is a serious air pollution problem in East Asia. Analysis of air quality network observations in the North China Plain and the Seoul Metropolitan Area shows that it is mainly anthropogenic and has decreased by 21% over 2015-2019. This anthropogenic coarse PM is generally not included in air quality models but scavenges nitric acid to suppress the formation of fine particulate (PM2.5) nitrate, a major contributor to PM2.5 pollution. Including it in the GEOS-Chem model decreases simulated PM2.5 nitrate to improve agreement with observations. Decreasing anthropogenic coarse PM over 2015-2019 directly increases PM2.5 nitrate in summer, offsetting the effect of other emission controls, while in winter it increases the sensitivity of PM2.5 nitrate to ammonia and sulfur dioxide emissions. Our work implies the need for stronger ammonia and nitrogen oxides emission controls to improve PM2.5 air quality as coarse PM continues to decrease.
Topik & Kata Kunci
Penulis (22)
Shixian Zhai
Daniel J. Jacob
Drew C. Pendergrass
Nadia K. Colombi
Viral Shah
Laura Hyesung Yang
Qiang Zhang
Shuxiao Wang
Hwajin Kim
Yele Sun
Jin-Soo Choi
Jin-Soo Park
Gan Luo
Fangqun Yu
Jung-Hun Woo
Younha Kim
Jack E. Dibb
Taehyoung Lee
Jin-Seok Han
Bruce E. Anderson
Ke Li
Hong Liao
Akses Cepat
- Tahun Terbit
- 2022
- Bahasa
- en
- Sumber Database
- arXiv
- Akses
- Open Access ✓