The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China

doi:10.5194/acp-20-14873-2020

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 粉尘与环境研究室

	The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China
	Zhao, Shuyu 3; Feng, Tian 1; Tie, Xuexi 3,4; Wang, Zebin 2
刊名	ATMOSPHERIC CHEMISTRY AND PHYSICS
	2020-12-03
卷号	20 期号:23 页码:14873-14887
ISSN号	1680-7316
DOI	10.5194/acp-20-14873-2020
通讯作者	Tie, Xuexi(tiexx@ieecas.cn)
英文摘要	Impacts of global climate change on the occurrence and development of air pollution have attracted more attention. This study investigates impacts of the warming Tibetan Plateau on air quality in the Sichuan Basin. Meteorological observations and ERA-Interim reanalysis data reveal that the plateau has been rapidly warming during the last 40 years (1979-2017), particularly in winter when the warming rate is approximately twice as much as the annual warming rate. Since 2013, the winter temperature over the plateau has even risen by 2 degrees C. Here we use the WRF-Chem model to lay emphasis on the impact of the 2 degrees C warming on air quality in the basin. The model results show that the 2 degrees C warming causes an enhanced easterly wind, an increase in the planetary boundary layer height (PBLH) and a decrease in the relative humidity (RH) in the basin. Enhanced easterly wind increases PM2.5 transport from the basin to the plateau. The elevated PBLH strengthens vertical diffusion of PM2.5, while the decreased RH significantly reduces secondary aerosol formation. Overall, PM2.5 concentration is reduced by 17.5 % (similar to 25.1 mu g m(-3)), of which the reduction in primary and secondary aerosols is 5.4 and 19.7 mu g m(-3) respectively. These results reveal that the recent warming plateau has improved air quality in the basin, to a certain extent mitigating the air pollution therein. Nevertheless, the climate system is particularly complicated, and more studies are needed to demonstrate the impact of climate change on air quality in the downstream regions as the plateau is likely to continue warming.
资助项目	National Natural Science Foundation of China[41430424] ; National Natural Science Foundation of China[41730108] ; National Natural Science Foundation of China[41807307] ; West Light Foundation of the Chinese Academy of Sciences[XAB2016B04]
WOS关键词	ORGANIC AEROSOL CONCENTRATIONS ; MEXICO-CITY ; GUANZHONG BASIN ; CLIMATE-CHANGE ; CHEMICAL-COMPOSITION ; EXTREME WEATHER ; RIVER DELTA ; HAZE DAYS ; POLLUTION ; MODEL
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	COPERNICUS GESELLSCHAFT MBH
WOS记录号	WOS:000595239200001
资助机构	National Natural Science Foundation of China ; West Light Foundation of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/15624]
专题	地球环境研究所_粉尘与环境研究室
通讯作者	Tie, Xuexi
作者单位	1.Ningbo Univ, Dept Geog & Spatial Informat Tech, Ningbo 315211, Peoples R China 2.Civil Aviat Adm China, Northwest Air Traff Management Bur, Xian 712000, Peoples R China 3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, SKLLQG, Xian 710061, Peoples R China 4.Chinese Acad Sci, Ctr Excellence Urban Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Shuyu,Feng, Tian,Tie, Xuexi,et al. The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2020,20(23):14873-14887.
APA	Zhao, Shuyu,Feng, Tian,Tie, Xuexi,&Wang, Zebin.(2020).The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China.ATMOSPHERIC CHEMISTRY AND PHYSICS,20(23),14873-14887.
MLA	Zhao, Shuyu,et al."The warming Tibetan Plateau improves winter air quality in the Sichuan Basin, China".ATMOSPHERIC CHEMISTRY AND PHYSICS 20.23(2020):14873-14887.