干旱区生态环境知识资源中心(Arid): Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city

Arid

DOI	10.1371/journal.pone.0249563
	Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city
	Li, Zongying; Wang, Yao; Xu, Zhonglin; Cao, Yue'e
通讯作者	Xu, ZL (corresponding author), Xinjiang Univ, Coll Resource & Environm Sci, Urumqi, Peoples R China. ; Xu, ZL (corresponding author), Minist Educ, Key Lab Oasis Ecol, Urumqi, Peoples R China. ; Cao, Y (corresponding author), Shanghai Normal Univ, Sch Environm & Geog Sci, Shanghai, Peoples R China.
来源期刊	PLOS ONE
ISSN	1932-6203
出版年	2021
卷号	16 期号:4
英文摘要	The arid zone of central Asia secluded inland and has the typical features of the atmosphere. Human activities have had a significant impact on the air quality in this region. Urumqi is a key city in the core area of the Silk Road and an important economic center in Northwestern China. The urban environment is playing an increasingly important role in regional development. To study the characteristics and influencing factors of the main atmospheric pollutants in Urumqi, this study selected Urumqi's daily air quality index (AQI) data and observation data of six major pollutants including fine particulate matter (PM2.5), breathable particulate matter (PM10), sulfur dioxide (SO2), nitrogen dioxide (NO2), carbon monoxide (CO), and ozone (O-3_8h) from 2014 to 2018 in conjunction with meteorological data to use a backward trajectory analysis method to study the main characteristics of atmospheric pollutants and their sources in Urumqi from 2014 to 2018. The results showed that: (1) From 2014 to 2018, the annual average of PM2.5, PM10, SO2, NO2 and CO concentrations showed a downward trend, and O-3_8h concentrations first increased, then decreased, and then increased, reaching the highest value in 2018 (82.15 mu g.m(-3)); The seasonal changes of PM2.5, PM10, SO2, NO2 and CO concentrations were characterized by low values in summer and fall seasons and high values in winter and spring seasons. The concentration of O-3_8h, however, was in the opposite trend, showing the high values in summer and fall seasons, and low values in winter and spring seasons. From 2014 to 2018, with the exception of O-3_8h, the concentration changes of the other five major air pollutants were high in December, January, and February, and low in May, June, and July; the daily changes showed a U-shaped change during the year. The high-value areas of the U-shaped mode formed around the 50th day and the 350th day. (2) The high-value area of AQI was from the end of fall (November) to the beginning of the following spring (March), and the low-value area was from April to October. It showed a U-shaped change trend during the year and the value was mainly distributed between 50 and 100. (3) The concentrations of major air pollutants in Urumqi were significantly negatively correlated with precipitation, temperature, and humidity (P<0.01), and had the highest correlation coefficients with temperature. (4) Based on the above analysis results, this study analyzed two severe pollution events from late November to early December. Analysis showed that the PM2.5/PM10 ratio in two events remained at about 0.1 when the pollution occurred, but was higher before and after the pollution (up to 1.46). It was shown that the pollution was a simple sandstorm process. Backward trajectory analysis clustered the airflow trajectories reaching Urumqi into 4 categories, and the trajectories from central Asia contributed the maximum values of average PM2.5 and PM10 concentrations.
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000642162200005
WOS关键词	AIR-POLLUTION INDEX ; YANGTZE-RIVER DELTA ; METEOROLOGICAL FACTORS ; URBANIZATION STRATEGY ; TERM EXPOSURE ; CHINA ; PM2.5 ; QUALITY ; PM10 ; MORTALITY
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
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/2XILL650/351395
作者单位	[Li, Zongying; Xu, Zhonglin] Xinjiang Univ, Coll Resource & Environm Sci, Urumqi, Peoples R China; [Li, Zongying; Xu, Zhonglin] Minist Educ, Key Lab Oasis Ecol, Urumqi, Peoples R China; [Wang, Yao] China Meteorol Adm, Inst Desert Meteorol, Urumqi, Peoples R China; [Cao, Yue'e] Shanghai Normal Univ, Sch Environm & Geog Sci, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Li, Zongying,Wang, Yao,Xu, Zhonglin,et al. Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city[J]. 新疆大学,2021,16(4).
APA	Li, Zongying,Wang, Yao,Xu, Zhonglin,&Cao, Yue'e.(2021).Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city.PLOS ONE,16(4).
MLA	Li, Zongying,et al."Characteristics and sources of atmospheric pollutants in typical inland cities in arid regions of central Asia: A case study of Urumqi city".PLOS ONE 16.4(2021).