气候变化领域集成服务门户(CCPortal): Systematic classification of circulation patterns and integrated analysis of their effects on different ozone pollution levels in the Yangtze River Delta Region, China

CCPortal

DOI	10.1016/j.atmosenv.2020.117760
	Systematic classification of circulation patterns and integrated analysis of their effects on different ozone pollution levels in the Yangtze River Delta Region, China
	Gao D.; Xie M.; Chen X.; Wang T.; Liu J.; Xu Q.; Mu X.; Chen F.; Li S.; Zhuang B.; Li M.; Zhao M.; Ren J.
发表日期	2020
ISSN	1352-2310
卷号	242
英文摘要	Ozone pollution is of great concern in the Yangtze River Delta (YRD) region of China. The regional air pollution is significantly associated with dominant weather systems. In this study, the relationship between O3 concentration and weather patterns over the YRD region is investigated. Specifically, based on the National Center for Environmental Prediction reanalysis data and the sums-of-squares technique, six typical weather patterns in 2017 are identified. It is found that higher O3 concentrations tend to occur under the weather patterns 3, 4 and 5. These high mean O3 concentrations are associated with the southerly flow introduced by the western Pacific subtropical high, the low pressure in the saddle field and the warm ocean current introduced by typhoon. Whereas the low mean O3 concentrations under the weather patterns 1, 2 and 6 are linked to the northwesterly flow brought from the Siberian high. Moreover, when the light pollution appears, main synoptic weather systems get weakened and the wind speed is reduced at 850 hPa and surface. At the same time, the temperature increases due to the weakening of the northerly wind introduced by the Siberian high and the North China warm high, and the strengthening of the southerly wind introduced by a southwest vortex. The occurrence of the heavy pollution is highly related to these further enhanced synoptic processes. The downward motion is obviously enhanced due to the trough or ridge deepening at 500 hPa and the strong downdraft around the typhoon. Higher temperature, lower wind and stronger downward motion due to the minor changes of atmospheric circulation establish conditions conducive to the formation and accumulation of O3. © 2020 Elsevier Ltd
关键词	Ozone pollution Synoptic weather classification The Yangtze River Delta region Weather patterns
语种	英语
scopus关键词	Air pollution; Hurricanes; Ozone; Wind; Atmospheric circulation; Circulation patterns; Integrated analysis; National center for environmental predictions; Regional air pollution; Temperature increase; Weather patterns; Yangtze river delta; River pollution; ozone; atmospheric circulation; atmospheric pollution; concentration (composition); light pollution; low pressure; ozone; subtropical region; typhoon; westerly; wind velocity; air pollution; airflow; Article; atmospheric pressure; China; classification; concentration (parameter); environmental temperature; hurricane; ocean current; pollution transport; priority journal; river; surface property; vortex motion; weather; wind speed; China; Yangtze River
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248922
作者单位	School of Atmospheric Sciences, Jiangsu Collaborative Innovation Center for Climate Change, Joint Center for Atmospheric Radar Research of CMA/NJU, CMA-NJU Joint Laboratory for Climate Prediction Studies, Nanjing University, Nanjing, 210023, China; College of Geographic Sciences, Fujian Normal University, Fuzhou, 350007, China; Jiangsu Air Traffic Management Branch Bureau of Civil Aviation Administration of China, Nanjing, 211113, China; Jiangsu Institute of Meteorological Science, Nanjing, 210009, China; Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing, 210042, China
推荐引用方式 GB/T 7714	Gao D.,Xie M.,Chen X.,et al. Systematic classification of circulation patterns and integrated analysis of their effects on different ozone pollution levels in the Yangtze River Delta Region, China[J],2020,242.
APA	Gao D..,Xie M..,Chen X..,Wang T..,Liu J..,...&Ren J..(2020).Systematic classification of circulation patterns and integrated analysis of their effects on different ozone pollution levels in the Yangtze River Delta Region, China.ATMOSPHERIC ENVIRONMENT,242.
MLA	Gao D.,et al."Systematic classification of circulation patterns and integrated analysis of their effects on different ozone pollution levels in the Yangtze River Delta Region, China".ATMOSPHERIC ENVIRONMENT 242(2020).