气候变化领域集成服务门户(CCPortal): Impact of western Pacific subtropical high on ozone pollution over eastern China

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DOI	10.5194/acp-21-2601-2021
	Impact of western Pacific subtropical high on ozone pollution over eastern China
	Jiang Z.; Li J.; Lu X.; Gong C.; Zhang L.; Liao H.
发表日期	2021
ISSN	1680-7316
起始页码	2601
结束页码	2613
卷号	21 期号:4
英文摘要	Surface ozone is a major pollutant in eastern China, especially during the summer season. The formation of surface ozone pollution highly depends on meteorological conditions largely controlled by regional circulation patterns which can modulate ozone concentrations by influencing the emission of the precursors, the chemical production rates, and regional transport. Here we show that summertime ozone pollution over eastern China is distinctly modulated by the variability of the western Pacific subtropical high (WPSH), a major synoptic system that controls the summertime weather conditions of East Asia. Composite and regression analyses indicate that a positive WPSH anomaly is associated with higher than normal surface ozone concentration over northern China but lower ozone over southern China. Stronger than normal WPSH leads to higher temperatures, stronger solar radiation at the land surface, lower relative humidity, and less precipitation in northern China, favoring the production and accumulation of surface ozone. In contrast, all meteorological variables show reverse changes in southern China under a stronger WPSH. GEOS-Chem simulations reasonably reproduce the observed ozone changes associated with the WPSH and support the statistical analyses. We further conduct a budget diagnosis to quantify the detailed contributions of chemistry, transport, mixing, and convection processes. The result shows that chemistry plays a decisive role in leading the ozone changes among these processes. Results show that the changes in ozone are primarily attributed to chemical processes. Moreover, the natural emission of precursors from biogenic and soil sources, a major component influencing the chemical production, accounts for ∼ 30 % of the total surface ozone changes. © 2021 Author(s).
语种	英语
scopus关键词	atmospheric pollution; concentration (composition); EOS; ozone; regression analysis; subtropical region; summer; China; Pacific Ocean; Pacific Ocean (West)
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/247127
作者单位	Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing, China; School of Engineering and Applied Sciences, Harvard University, Cambridge, United States; Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing, China
推荐引用方式 GB/T 7714	Jiang Z.,Li J.,Lu X.,et al. Impact of western Pacific subtropical high on ozone pollution over eastern China[J],2021,21(4).
APA	Jiang Z.,Li J.,Lu X.,Gong C.,Zhang L.,&Liao H..(2021).Impact of western Pacific subtropical high on ozone pollution over eastern China.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(4).
MLA	Jiang Z.,et al."Impact of western Pacific subtropical high on ozone pollution over eastern China".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.4(2021).