干旱区生态环境知识资源中心(Arid): Humidity and PM2.5 composition determine atmospheric light extinction in the arid region of northwest China

Arid

DOI	10.1016/j.jes.2020.07.007
	Humidity and PM2.5 composition determine atmospheric light extinction in the arid region of northwest China
	Zhang, Xiaoxiao; Ding, Xiang; Talifu, Dilinuer; Wang, Xinming; Abulizi, Abulikemu; Maihemuti, Mailikezhati; Rekefu, Suwubinuer
通讯作者	Talifu, D
来源期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN	1001-0742
EISSN	1878-7320
出版年	2021
卷号	100 页码:279-286
英文摘要	Atmospheric visibility can directly reflect the air quality. In this study, we measured watersoluble ions (WSIs), organic and element carbon (OC and EC) in PM2.5 from September 2017 to August 2018 in Urumqi, NW China. The results show that SO42-, NO3- and NH4+ were the major WSIs, together accounting for 7.32%-84.12% of PM2.5 mass. Total carbon (TC=OC+EC) accounted for 12.12% of PM2.5 mass on average. And OC/EC > 2 indicated the formation of secondary organic carbon (SOC). The levels of SO42-, NO3- and NH4+ in low visibility days were much higher than those in high visibility days. Relative humidity (RH) played a key role in affecting visibility. The extinction coefficient (b(exi)) that estimated via Koschmieder formula with visibility was the highest in winter (1441.05 +/- 739.95 Mm(-1)), and the lowest in summer (128.58 +/- 58.00 Mm(-1)). The beat that estimated via IMPROVE formula with PM2.5 chemical component was mainly contributed by (NH4)(2)SO4 and NH4NO3. The beat values calculated by both approaches presented a good correlation with each other (R-2 = 0.87). Multiple linear regression (MLR) method was further employed to reconstruct the empirical regression model of visibility as a function of PM2.5 chemical components, NO2 and RH. The results of source apportionment by Positive Matrix Factorization (PMF) model showed that residential coal combustion and vehicle emissions were the major sources of beat. (C) 2020 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
英文关键词	Aerosol chemical composition Visibility IMPROVE Light extinction Source apportionment South of Urumqi
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000596939800028
WOS关键词	WATER-SOLUBLE IONS ; SOURCE APPORTIONMENT ; CHEMICAL CHARACTERISTICS ; SIZE DISTRIBUTIONS ; OPTICAL-PROPERTIES ; AMBIENT PM2.5 ; BLACK CARBON ; AEROSOL ; WINTER ; VISIBILITY
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328057
作者单位	[Zhang, Xiaoxiao; Talifu, Dilinuer; Abulizi, Abulikemu; Maihemuti, Mailikezhati; Rekefu, Suwubinuer] Xinjiang Univ, Key Lab Coal Clean Convers & Chem Engn Proc, Urumqi 830046, Xinjiang Uyghur, Peoples R China; [Ding, Xiang; Wang, Xinming] Chinese Acad Sci, State Key Lab Organ Geochem, Guangzhou Inst Geochem, Guangzhou 510640, Peoples R China; [Ding, Xiang; Wang, Xinming] Guangdong Hong Kong Macao Joint Lab Environm Poll, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiaoxiao,Ding, Xiang,Talifu, Dilinuer,et al. Humidity and PM2.5 composition determine atmospheric light extinction in the arid region of northwest China[J]. 新疆大学,2021,100:279-286.
APA	Zhang, Xiaoxiao.,Ding, Xiang.,Talifu, Dilinuer.,Wang, Xinming.,Abulizi, Abulikemu.,...&Rekefu, Suwubinuer.(2021).Humidity and PM2.5 composition determine atmospheric light extinction in the arid region of northwest China.JOURNAL OF ENVIRONMENTAL SCIENCES,100,279-286.
MLA	Zhang, Xiaoxiao,et al."Humidity and PM2.5 composition determine atmospheric light extinction in the arid region of northwest China".JOURNAL OF ENVIRONMENTAL SCIENCES 100(2021):279-286.