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	Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China
	Zhao, Suping1,2,3; Yu, Ye1; Yin, Daiying4; Qin, Dahe3; He, Jianjun5,6; Li, Jianglin1; Dong, Longxiang1
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2018-09-15
卷号	636页码:1228-1240
关键词	Sichuan Basin PM2.5 Air quality Meteorology
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.04.393
通讯作者	Zhao, Suping(zhaosp@lzb.ac.cn) ; Yin, Daiying(yindaiying@lzb.ac.cn)
英文摘要	PM2.5 pollution types were analyzed and the causes were uncovered in Sichuan Basin using PM2.5 data from Chinese Ministry of Environmental Protection (MEP) and multiple meteorology data during January 2015 to February 2017. The events that PM2.5 increased gradually in the periods longer than 10 days and then decreased sharply were defined as "Type I", while the symmetrical variations of PM2.5 during increasing and decreasing periods were defined as "Type II" of PM2.5 pollution. Five cases of Type I and two cases of Type II were identified during the study period inside the basin. The increasing rates were almost comparable between the two PM2.5 pollution types with the range from 4 mu g m(-3) d(-1) to 8 mu g m(-3) d(-1), while the decreasing rates of Type I were between 25 mu g m(-3) d(-1) and 40 mu g m(-3) d(-1), which were 3-5 times higher than those of Type II (similar to 8 mu g m(-3) d(-1)). The rapid reduction of PM2.5 for Type I was mainly related to improvement of vertical and horizontal diffusion conditions induced by invasion of cold air masses, while slowly decreased PM2.5 for Type II was due largely to elevated horizontal wind speeds and shifted wind directions in the city clusters of the basin. (C) 2018 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	PROVINCIAL CAPITAL CITIES ; CRITERIA AIR-POLLUTANTS ; AEROSOL OPTICAL DEPTH ; PARTICULATE MATTER ; TEMPORAL VARIATIONS ; 3 MEGACITIES ; PATTERNS ; VARIABILITY ; QUALITY ; CHENGDU
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000436599000121
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557763
专题	寒区旱区环境与工程研究所
通讯作者	Zhao, Suping; Yin, Daiying
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China 2.Shanghai Key Lab Atmospher Particle Pollut & Prev, Shanghai 200433, Peoples R China 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Cryospher Sci, Lanzhou 730000, Gansu, Peoples R China 4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, Peoples R China 5.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China 6.Chinese Acad Meteorol Sci, Key Lab Atmospher Chem CMA, Beijing 100081, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Suping,Yu, Ye,Yin, Daiying,et al. Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2018,636:1228-1240.
APA	Zhao, Suping.,Yu, Ye.,Yin, Daiying.,Qin, Dahe.,He, Jianjun.,...&Dong, Longxiang.(2018).Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China.SCIENCE OF THE TOTAL ENVIRONMENT,636,1228-1240.
MLA	Zhao, Suping,et al."Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China".SCIENCE OF THE TOTAL ENVIRONMENT 636(2018):1228-1240.

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