气候变化领域集成服务门户(CCPortal): Unexpectedly high concentrations of atmospheric mercury species in Lhasa, the largest city in the Tibetan Plateau

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DOI	10.5194/acp-23-3937-2023
	Unexpectedly high concentrations of atmospheric mercury species in Lhasa, the largest city in the Tibetan Plateau
	Lin, Huiming; Tong, Yindong; Chen, Long; Yu, Chenghao; Chu, Zhaohan; Zhang, Qianru; Yin, Xiufeng; Zhang, Qianggong; Kang, Shichang; Liu, Junfeng; Schauer, James; de Foy, Benjamin; Wang, Xuejun
发表日期	2023
ISSN	1680-7316
EISSN	1680-7324
起始页码	3937
结束页码	3953
卷号	23 期号:7
英文摘要	The city of Lhasa is located in the central Tibetan Plateau and is the most densely populated area. As the first continuous monitoring of atmospheric mercury (Hg) species in a city in the Tibetan Plateau, our monitoring in Lhasa showed that the concentrations of gaseous elemental Hg (GEM), gaseous oxidized Hg (GOM), and particle-bound Hg (PBM) during the subsequent Indian summer monsoon (S-ISM) period were 2.73 +/- 1.48 ng m(-3), 38.4 +/- 62.7 pg m(-3), and 59.1 +/- 181.0 pg m(-3), respectively. During the westerly circulation (WEC) period, the GEM, GOM, and PBM concentrations were 2.11 +/- 2.09 ng m(-3), 35.8 +/- 43.3 pg m(-3), and 52.9 +/- 90.1 pg m(-3), respectively. The GOM and PBM concentrations were higher than those of previous monitoring in the Tibetan Plateau and other provincial capitals in China. Typical high-value occurrence processes were studied to investigate random events with high atmospheric Hg concentrations in Lhasa. Combustion events nearby or further away may be the main contributor of the high-concentration events. The lowest GEM concentrations occurred in the afternoon, and persistently high concentrations were observed at night. The changes in GEM concentrations were consistent with the trends of other pollutant concentrations and contradictory to those of the wind speed. The high GEM concentrations at night can be attributed to the lower boundary layer height and lower wind speed. For both GOM and PBM, higher GOM concentrations occurred during the day and PBM during the night. The results of the principal component analysis indicated that local sources and wind speed are important factors influencing atmospheric Hg concentrations in Lhasa. The trajectory simulation showed that the source of the GEM in Lhasa gradually shifted from the south to the west of Lhasa from the S-ISM to the WEC periods, while both the southern and western sources were important in the late WEC period. The concentrations and change patterns of Hg species in Lhasa were significantly different than those at other monitoring sites in the Tibetan Plateau. Monitoring Hg species in Lhasa shows the possible maximum anthropogenic influences in the Tibetan Plateau and demonstrates the dramatic effect of wind on changes in urban atmospheric Hg concentrations.
英文关键词	GASEOUS ELEMENTAL MERCURY; POLYCYCLIC AROMATIC-HYDROCARBONS; TRACE-ELEMENTS; YAK DUNG; TRANSBOUNDARY TRANSPORT; PARTICULATE MERCURY; SEASONAL-VARIATIONS; DISPERSION MODEL; BLACK CARBON; DEPOSITION
WOS研究方向	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000964150000001
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
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/283901
作者单位	Peking University; Tibet University; Tianjin University; East China Normal University; Zhejiang University; Chinese Academy of Sciences; Chinese Academy of Sciences; Institute of Tibetan Plateau Research, CAS; Chinese Academy of Sciences; University of Wisconsin System; University of Wisconsin Madison; University of Wisconsin System; University of Wisconsin Madison; Saint Louis University
推荐引用方式 GB/T 7714	Lin, Huiming,Tong, Yindong,Chen, Long,et al. Unexpectedly high concentrations of atmospheric mercury species in Lhasa, the largest city in the Tibetan Plateau[J]. 中国科学院青藏高原研究所,2023,23(7).
APA	Lin, Huiming.,Tong, Yindong.,Chen, Long.,Yu, Chenghao.,Chu, Zhaohan.,...&Wang, Xuejun.(2023).Unexpectedly high concentrations of atmospheric mercury species in Lhasa, the largest city in the Tibetan Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,23(7).
MLA	Lin, Huiming,et al."Unexpectedly high concentrations of atmospheric mercury species in Lhasa, the largest city in the Tibetan Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 23.7(2023).