气候变化领域集成服务门户(CCPortal): Latest observations of total gaseous mercury in a megacity (Lanzhou) in northwest China

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DOI	10.1016/j.scitotenv.2020.137494
	Latest observations of total gaseous mercury in a megacity (Lanzhou) in northwest China
	Yin, Xiufeng; Zhou, Wenting; Kang, Shichang; de Foy, Benjamin; Yu, Ye; Xie, Jin; Sun, Shiwei; Wu, Kunpeng; Zhang, Qianggong
通讯作者	Kang, SC (通讯作者)
发表日期	2020
ISSN	0048-9697
EISSN	1879-1026
卷号	720
英文摘要	One year of online total gaseous mercury (TGM) measurements were carried out for the first time in Lanzhou, a city in northwest China that was once seriously polluted. Measurements were made from October 2016 to October 2017 using the Tekran 2537B instrument, and the annual mean concentration of TGM in Lanzhou was 4.48 +/- 2.32 ng m(-3) (mean +/- standard deviation). TGM concentrations decreased during the measurement period, with autumn 2017 average concentrations 2.87 ng m(-3) lower than autumn 2016 average concentrations. Similar diurnal variations of TGM were obtained in different seasons with low concentrations observed in the afternoon and high concentrations at night. The principal component analysis and conditional probability function results revealed that the sources of mercury were similar to the other atmospheric pollutants such as SO2, CO, NO2 and PM2.5, and were mainly from industrial combustion plants in urban districts. Concentration weighted trajectory analysis using backward trajectories demonstrated that higher mercury concentrations were related to air masses from adjacent regions, indicating the importance of influences from local-to-regional scale sources. A synthesis of multi-decadal atmospheric mercury measurements in Lanzhou and other Chinese megacities revealed that atmospheric mercury concentrations were either generally stable or experienced a slight decrease, during a time when China implemented control measures on atmospheric pollution. Long-term atmospheric mercury observations in urban and background sites in China are warranted to assess mercury pollution and the effectiveness of China's mercury control policies. (C) 2020 Elsevier B.V. All rights reserved.
关键词	SPECIATED ATMOSPHERIC MERCURY ELEMENTAL MERCURY TIBETAN PLATEAU TEMPORAL TREND INLAND CITY EMISSIONS POLLUTION REGION URBAN SITE
英文关键词	Total gaseous mercury; Observation; Temporal variation; Potential sources; Pollution control
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000525736600085
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260027
推荐引用方式 GB/T 7714	Yin, Xiufeng,Zhou, Wenting,Kang, Shichang,et al. Latest observations of total gaseous mercury in a megacity (Lanzhou) in northwest China[J]. 中国科学院青藏高原研究所,2020,720.
APA	Yin, Xiufeng.,Zhou, Wenting.,Kang, Shichang.,de Foy, Benjamin.,Yu, Ye.,...&Zhang, Qianggong.(2020).Latest observations of total gaseous mercury in a megacity (Lanzhou) in northwest China.SCIENCE OF THE TOTAL ENVIRONMENT,720.
MLA	Yin, Xiufeng,et al."Latest observations of total gaseous mercury in a megacity (Lanzhou) in northwest China".SCIENCE OF THE TOTAL ENVIRONMENT 720(2020).