Xiaolin Wang1, Tzung-May Fu2,3,*, Lin Zhang1,*, Xiao Lu4, Xiong Liu5, Teerachai Amnuaylojaroen6, Mohd Talib Latif7, Yaping Ma8, Lijuan Zhang9, Xu Feng10, Lei Zhu2,3, Huizhong Shen2,3, Xin Yang2,3
1 Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, 100871, China
2 School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
3 Guangdong Provincial Observation and Research Station for Coastal Atmosphere and Climate of the Greater Bay Area, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China
4 School of Atmospheric Sciences, Sun Yat-sen University, Zhuhai, Guangdong, 519082, China
5 Center for Astrophysics | Harvard & Smithsonian, Cambridge, Massachusetts, 02138, USA
6 Department of Environmental Science, School of Energy and Environment, University of Phayao, Phayao, 56000, Thailand
7 Department of Earth Sciences and Environment, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, Bangi, Selangor, 43600, Malaysia
8 National Meteorological Information Center, China Meteorological Administration, Beijing, 100081, China
9 Shanghai Central Meteorological Observatory, Shanghai, 200030, China
10 John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, 02138, USA
Correspondence to: Tzung-May Fu (fuzm@sustech.edu.cn); Lin Zhang (zhanglg@pku.edu.cn)
Abstract
We combined observations and simulations to assess tropospheric ozone trends over Southeast Asia from 2005 to 2016. Multi-platform observations showed that surface ozone had been increasing at rates of 0.7 to 1.2 ppb year-1 over the Peninsular Southeast Asia (PSEA) and 0.2 to 0.4 ppb year-1 over the Maritime Continents (MC); tropospheric ozone columns had been rising throughout Southeast Asia by 0.21 to 0.35 DU year-1. These observed ozone trends were better reproduced by simulations driven with satellite-constrained NOx emissions, indicating that NOx emission growths may have been underestimated for the PSEA and overestimated for the MC in the Community Emissions Data System and the Global Fire Emissions Dataset. The surface ozone increases over the PSEA were driven by rapidly growing local emissions, wherein fire emission growths may still be underestimated even with satellite constraints. We highlighted the need for better quantifying Southeast Asian emissions to benefit air quality management.
Key Points
1. Surface and tropospheric ozone has risen significantly over Southeast Asia from 2005 to 2016
2. NOx emission trends underestimated over Peninsular Southeast Asia but overestimated over Maritime Continents in inventories
3. Growing anthropogenic emissions drove large surface ozone increases over Peninsular Southeast Asia
Citation
Wang, X., Fu, T.-M., Zhang, L., Lu, X., Liu, X., Amnuaylojaroen, T., et al. (2022). Rapidly changing
emissions drove substantial surface and tropospheric ozone increases over Southeast Asia. Geophysical Research Letters, 49, e2022GL100223. https://doi.org/10.1029/2022GL100223
