Vertical characterization and potential sources of aerosols in different seasons over the Yangtze River Delta using ground-based MAX-DOAS

doi:10.1016/j.envpol.2021.116898

	Vertical characterization and potential sources of aerosols in different seasons over the Yangtze River Delta using ground-based MAX-DOAS
	Ou, Jinping 3; Hu, Qihou 1; Liu, Haoran 3; Hong, Qianqian 4; Xing, Chengzhi 1; Tan, Wei 1; Lin, Hua 2; Wang, Xinqi 3; Xu, Heng 3; Zhu, Pengcheng 3
刊名	ENVIRONMENTAL POLLUTION
	2021-06-15
卷号	279
关键词	Multi-axis differential optical absorption spectroscopy (MAX-DOAS) Hefei Regional transport Aerosol extinction coefficient
ISSN号	0269-7491
DOI	10.1016/j.envpol.2021.116898
通讯作者	Hu, Qihou(qhhu@aiofm.ac.cn)
英文摘要	Assessing the vertical distribution of aerosols in the atmosphere can elucidate the regional sources of accumulated pollutants at different altitudes. Although studies in Hefei have mainly focused on aerosols in the near-surface atmosphere, few studies have assessed the vertical variability in aerosol concentrations. In this study, the vertical aerosol distribution in Hefei was analyzed continuously for one year (from March 2018 to February 2019) using multi-axis differential optical absorption spectroscopy. The aerosol extinction coefficient was the highest in winter (0.94 km(-1)), followed by autumn (0.63 km(-1)), spring (0.57 km(-1)), and summer (0.47 km(-1)). Local pollution caused the accumulation of aerosols near the surface. The rate of decrease of the aerosol extinction coefficient was higher in autumn and winter than in spring and summer. The diurnal variations of aerosol extinction coefficient in the different seasons were affected by the planetary boundary layer height, and we observed notable high-altitude transport of aerosols in autumn. We assessed the vertical distribution of the aerosol extinction coefficient under different pollution concentrations and identified peak values mainly below a height of 0.5 km. With increasing height, the extinction coefficient decreased linearly and slowly under low PM2.5 concentrations, whereas decreased more rapidly under high PM2.5 concentrations. Clustering analysis, the weight potential source concentration function, and the concentration weighted trajectory model inferred different seasonal characteristics in the potential source areas of aerosols at different heights. In addition to local pollution sources, Jiangsu Province was found to be the main source of pollution in Hefei at a height of 0.4 km, whereas Hubei Province was the main source of pollution at a height of 2 km. (C) 2021 Elsevier Ltd. All rights reserved.
资助项目	National Key Research and Development Program of China[2017YFC0210002] ; National Key Research and Development Program of China[2018YFC0213104] ; National Key Research and Development Program of China[2016YFC0203302] ; National Key Research and Development Program of China[2017YFC0212800] ; National Natural Science Foundation of China[41722501] ; National Natural Science Foundation of China[51778596] ; National Natural Science Foundation of China[41977184] ; National Natural Science Foundation of China[41941011] ; Anhui Science and Technology Major Project[18030801111] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA23020301] ; National Key Project for Causes and Control of Heavy Air Pollution[DQGG0102] ; National Key Project for Causes and Control of Heavy Air Pollution[DQGG0205] ; Natural Science Foundation of Anhui Province[1908085QD170] ; Key Research and Development Project of Anhui Province[202004i07020002] ; Youth Innovation Promotion Association of CAS[2021443] ; Center for Excellence in Regional Atmospheric Environment, CAS[CERAE202004]
WOS关键词	OPTICAL-PROPERTIES ; TROPOSPHERIC AEROSOLS ; REGIONAL TRANSPORT ; BLACK CARBON ; PROFILES ; NO2 ; POLLUTION ; CHINA ; HEFEI ; SO2
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000644822400016
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Anhui Science and Technology Major Project ; Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key Project for Causes and Control of Heavy Air Pollution ; Natural Science Foundation of Anhui Province ; Key Research and Development Project of Anhui Province ; Youth Innovation Promotion Association of CAS ; Center for Excellence in Regional Atmospheric Environment, CAS
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/122173]
专题	中国科学院合肥物质科学研究院
通讯作者	Hu, Qihou
作者单位	1.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Hefei Inst Phys Sci, Key Lab Environm Opt & Technol, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Sch Environm Sci & Optoelect Technol, Hefei 230026, Peoples R China 3.Anhui Univ, Inst Phys Sci & Informat Technol, Hefei 230601, Peoples R China 4.Jiangnan Univ, Wuxi 214122, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Ou, Jinping,Hu, Qihou,Liu, Haoran,et al. Vertical characterization and potential sources of aerosols in different seasons over the Yangtze River Delta using ground-based MAX-DOAS[J]. ENVIRONMENTAL POLLUTION,2021,279.
APA	Ou, Jinping.,Hu, Qihou.,Liu, Haoran.,Hong, Qianqian.,Xing, Chengzhi.,...&Liu, Wenqing.(2021).Vertical characterization and potential sources of aerosols in different seasons over the Yangtze River Delta using ground-based MAX-DOAS.ENVIRONMENTAL POLLUTION,279.
MLA	Ou, Jinping,et al."Vertical characterization and potential sources of aerosols in different seasons over the Yangtze River Delta using ground-based MAX-DOAS".ENVIRONMENTAL POLLUTION 279(2021).