气候变化领域集成服务门户(CCPortal): Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China

CCPortal

DOI	10.1016/j.scitotenv.2018.04.393
	Two winter PM2.5 pollution types and the causes in the city clusters of Sichuan Basin, Western China
	Zhao, Suping; Yu, Ye; Yin, Daiying; Qin, Dahe; He, Jianjun; Li, Jianglin; Dong, Longxiang
发表日期	2018
ISSN	0048-9697
起始页码	1228
结束页码	1240
卷号	636
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.
英文关键词	Sichuan Basin; PM2.5; Air quality; Meteorology
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158514
作者单位	Zhao, SP (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China.; Yin, DY (corresponding author), Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Desert & Desertificat, Lanzhou 730000, Gansu, 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],2018,636.
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.
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).