气候变化领域集成服务门户(CCPortal): First observation of mercury species on an important water vapor channel in the southeastern Tibetan Plateau

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DOI	10.5194/acp-22-2651-2022
	First observation of mercury species on an important water vapor channel in the southeastern Tibetan Plateau
	Lin, Huiming; Tong, Yindong; Yu, Chenghao; Chen, Long; Yin, Xiufeng; Zhang, Qianggong; Kang, Shichang; Luo, Lun; Schauer, James; de Foy, Benjamin; Wang, Xuejun
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	2651
结束页码	2668
卷号	22 期号:4 页码:18
英文摘要	The Tibetan Plateau is generally considered to be a significantly clean area owing to its high altitude; however, the transport of atmospheric pollutants from the Indian subcontinent to the Tibetan Plateau has influenced the Tibetan environments. Nyingchi is located at the end of an important water vapor channel. In this study, continuous monitoring of gaseous elemental mercury (GEM), gaseous oxidized mercury (GOM), and particle-bound mercury (PBM) was conducted in Nyingchi from 30 March to 3 September 2019, to study the influence of the Indian summer monsoon (ISM) on the origin, transport, and behavior of Hg. The GEM and PBM during the preceding Indian summer monsoon (PISM) period (1.20 +/- 0.35 ng m(-3) and 11.4 +/- 4.8 pg m(-3) for GEM and PBM, respectively) were significantly higher than those during the ISM period (0.95 +/- 0.21 ng m(-3), and 8.8 +/- 6.0 pg m(-3)); the GOM during the PISM period (13.5 +/- 7.3 pg m(-3)) was almost at the same level as that during the ISM period (12.7 +/- 14.3 pg m(-3)). The average GEM concentration in the Nyingchi region, obtained using passive sampler, was 1.12 +/- 0.28 ng m(-3) (from 4 April 2019 to 31 March 2020). The GEM concentration showed that the sampling area was very clean compared to other high-altitude sites. The GEM has several patterns of diurnal variation during different periods. Stable high GEM concentrations occur at night and low concentrations occur in the afternoon during PISM, which may be related to the nocturnal boundary layer structure. High values occurring in the late afternoon during the ISM may be related to long-range transport. Low concentrations of GEM observed during the morning in the ISM may originate from vegetation effects. The results of the trajectory model demonstrate that the sources of pollutants at Nyingchi are different with different circulation patterns. During westerly circulation in the PISM period, pollutants mainly originate from central India, northeastern India, and central Tibet. During the ISM period, the pollutants mainly originate from the southern part of the SET site. The strong precipitation and vegetation effects on Hg species during the ISM resulted in low Hg concentrations transmitted to Nyingchi during this period. Further, principal component analysis showed that long-distance transport, local emissions, meteorological factors, and snowmelt factors are the main factors affecting the local Hg concentration in Nyingchi. Long-distance transport factor dominates during PISM and ISM3, while local emissions is the major contributor between PISM and ISM3. Our results reveal the Hg species distribution and possible sources of the most important water vapor channel in the Tibetan Plateau and could serve as a basis for further transboundary transport flux calculations.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000763304100001
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/273343
作者单位	Peking University; Tianjin University; East China Normal 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,Yu, Chenghao,et al. First observation of mercury species on an important water vapor channel in the southeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2022,22(4):18.
APA	Lin, Huiming.,Tong, Yindong.,Yu, Chenghao.,Chen, Long.,Yin, Xiufeng.,...&Wang, Xuejun.(2022).First observation of mercury species on an important water vapor channel in the southeastern Tibetan Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(4),18.
MLA	Lin, Huiming,et al."First observation of mercury species on an important water vapor channel in the southeastern Tibetan Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.4(2022):18.