TY - JOUR
T1 - Ozone pollution over china and india
T2 - Seasonality and sources
AU - Gao, Meng
AU - Gao, Jinhui
AU - Zhu, Bin
AU - Kumar, Rajesh
AU - Lu, Xiao
AU - Song, Shaojie
AU - Zhang, Yuzhong
AU - Jia, Beixi
AU - Wang, Peng
AU - Beig, Gufran
AU - Hu, Jianlin
AU - Ying, Qi
AU - Zhang, Hongliang
AU - Sherman, Peter
AU - B. McElroy, Michael
N1 - Funding Information:
This work is supported by the special fund of the Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration, Nanjing University of Information Science and Technology (KDW1901); Harvard Global Institute; special fund of the State Key Joint Laboratory of Environmental Simulation and Pollution Control (19K03ESPCT); Natural Science Foundation of Guangdong Province (no. 2019A1515011633); National Natural Science Foundation of China Major Research Plan (integrated project; grant no. NSFC91843301); and National Key Research and Development Programme – Science, Technology, and Innovation Cooperation with Hong Kong, Macau, and Taiwan (2017YFE0191000).
PY - 2020/4/16
Y1 - 2020/4/16
N2 - A regional fully coupled meteorology-chemistry model,Weather Research and Forecasting model with Chemistry (WRF-Chem), was employed to study the seasonality of ozone (O3) pollution and its sources in both China and India. Observations and model results suggest that O3 in the North China Plain (NCP), Yangtze River Delta (YRD), Pearl River Delta (PRD), and India exhibit distinctive seasonal features, which are linked to the influence of summer monsoons. Through a factor separation approach, we examined the sensitivity of O3 to individual anthropogenic, biogenic, and biomass burning emissions. We found that summer O3 formation in China is more sensitive to industrial and biogenic sources than to other source sectors, while the transportation and biogenic sources are more important in all seasons for India. Tagged simulations suggest that local sources play an important role in the formation of the summer O3 peak in the NCP, but sources from Northwest China should not be neglected to control summer O3 in the NCP. For the YRD region, prevailing winds and cleaner air from the ocean in summer lead to reduced transport from polluted regions, and the major source region in addition to local sources is Southeast China. For the PRD region, the upwind region is replaced by contributions from polluted PRD as autumn approaches, leading to an autumn peak. The major upwind regions in autumn for the PRD are YRD (11 %) and Southeast China (10 %). For India, sources in North India are more important than sources in the south. These analyses emphasize the relative importance of source sectors and regions as they change with seasons, providing important implications for O3 control strategies.
AB - A regional fully coupled meteorology-chemistry model,Weather Research and Forecasting model with Chemistry (WRF-Chem), was employed to study the seasonality of ozone (O3) pollution and its sources in both China and India. Observations and model results suggest that O3 in the North China Plain (NCP), Yangtze River Delta (YRD), Pearl River Delta (PRD), and India exhibit distinctive seasonal features, which are linked to the influence of summer monsoons. Through a factor separation approach, we examined the sensitivity of O3 to individual anthropogenic, biogenic, and biomass burning emissions. We found that summer O3 formation in China is more sensitive to industrial and biogenic sources than to other source sectors, while the transportation and biogenic sources are more important in all seasons for India. Tagged simulations suggest that local sources play an important role in the formation of the summer O3 peak in the NCP, but sources from Northwest China should not be neglected to control summer O3 in the NCP. For the YRD region, prevailing winds and cleaner air from the ocean in summer lead to reduced transport from polluted regions, and the major source region in addition to local sources is Southeast China. For the PRD region, the upwind region is replaced by contributions from polluted PRD as autumn approaches, leading to an autumn peak. The major upwind regions in autumn for the PRD are YRD (11 %) and Southeast China (10 %). For India, sources in North India are more important than sources in the south. These analyses emphasize the relative importance of source sectors and regions as they change with seasons, providing important implications for O3 control strategies.
UR - http://www.scopus.com/inward/record.url?scp=85083774924&partnerID=8YFLogxK
U2 - 10.5194/acp-20-4399-2020
DO - 10.5194/acp-20-4399-2020
M3 - Journal article
AN - SCOPUS:85083774924
SN - 1680-7316
VL - 20
SP - 4399
EP - 4414
JO - Atmospheric Chemistry and Physics
JF - Atmospheric Chemistry and Physics
IS - 7
ER -
