气候变化领域集成服务门户(CCPortal): Large-scale synoptic drivers of co-occurring summertime ozone and PM2.5 pollution in eastern China

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DOI	10.5194/acp-21-9105-2021
	Large-scale synoptic drivers of co-occurring summertime ozone and PM2.5 pollution in eastern China
	Zong L.; Yang Y.; Gao M.; Wang H.; Wang P.; Zhang H.; Wang L.; Ning G.; Liu C.; Li Y.; Gao Z.
发表日期	2021
ISSN	1680-7316
起始页码	9105
结束页码	9124
卷号	21 期号:11
英文摘要	Surface ozone (O3) pollution during summer (June-August) over eastern China has become more severe in recent years, resulting in a co-occurrence of surface O3 and PM2.5 (particulate matter with aerodynamic diameters ≤ 2.5 μm in the air) pollution. However, the mechanisms regarding how the synoptic weather pattern (SWP) might influence this compound pollution remain unclear. In this study, we applied the T-mode principal component analysis (T-PCA) method to objectively classify the occurrence of four SWPs over eastern China, based on the geopotential heights at 500g hPa during summer (2015-2018). These four SWPs over eastern China were closely related to the western Pacific subtropical high (WPSH), exhibiting significant intra-seasonal and interannual variations. Based on ground-level air quality observations, remarkable spatial and temporal disparities of surface O3 and PM2.5 pollution were also found under the four SWPs. In particular, there were two SWPs that were sensitive to compound pollution (Type 1 and Type 2). Type 1 was characterized by a stable WPSH ridge with its axis at about 22°N and the rain belt located south of the Yangtze River Delta (YRD); Type 2 also exhibited WPSH dominance (ridge axis at ∼25°N) but with the rain belt (over the YRD) at a higher latitude compared to Type 1. In general, SWPs have played an important role as driving factors of surface O3-PM2.5 compound pollution in a regional context. Our findings demonstrate the important role played by SWPs in driving regional surface O3-PM2.5 compound pollution, in addition to the large quantities of emissions, and may also provide insights into the regional co-occurring high levels of both PM2.5 and O3 via the effects of certain meteorological factors. © 2021 Lian Zong et al.
语种	英语
scopus关键词	air quality; atmospheric pollution; concentration (composition); ozone; particulate matter; seasonal variation; source apportionment; spatiotemporal analysis; China; Yangtze Delta
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246806
作者单位	School of Atmospheric Physics, Nanjing University of Information Science and Technology, Nanjing, China; Department of Geography, Hong Kong Baptist University, Hong Kong; Policy Research Center for Environment and Economy, Ministry of Ecology and Environment of the People's Republic of China, Beijing, China; Department of environmental science and engineering, Fudan University, China; State Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Institute of Environment, Energy and Sustainability, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong
推荐引用方式 GB/T 7714	Zong L.,Yang Y.,Gao M.,et al. Large-scale synoptic drivers of co-occurring summertime ozone and PM2.5 pollution in eastern China[J],2021,21(11).
APA	Zong L..,Yang Y..,Gao M..,Wang H..,Wang P..,...&Gao Z..(2021).Large-scale synoptic drivers of co-occurring summertime ozone and PM2.5 pollution in eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(11).
MLA	Zong L.,et al."Large-scale synoptic drivers of co-occurring summertime ozone and PM2.5 pollution in eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.11(2021).