气候变化领域集成服务门户(CCPortal): Precipitation chemistry and stable isotopic characteristics at Wengguo in the northern slopes of the Himalayas

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DOI	10.1007/s10874-020-09399-1
	Precipitation chemistry and stable isotopic characteristics at Wengguo in the northern slopes of the Himalayas
	Adhikari, Subash; Zhang, Fan; Zeng, Chen; Tripathee, Lekhendra; Adhikari, Namita Paudel; Xu, Jie; Wang, Guanxing
通讯作者	Zhang, F (通讯作者)
发表日期	2019
ISSN	0167-7764
EISSN	1573-0662
起始页码	289
结束页码	313
卷号	76 期号:4
英文摘要	The major ions in precipitation can reflect the conditions of the atmosphere, while stable isotopic characteristics provide information on the moisture source. In order to understand the local hydro-chemical features and regional geochemical cycle, it is essential to assess the chemical composition of precipitation and the associated sources. Therefore, a total of 57 precipitation samples (2016 to 2017) for major ions and 178 samples (2013 to 2017) for stable isotopes were collected from the Wengguo station and analyzed to explore the major ionic deposition and stable isotopic characteristics in the northern slopes of the Himalayas. The average pH and electrical conductivity were 6.82 +/- 0.45 and 15.36 +/- 11.67 mu S cm(-1), respectively. Ca2+ followed by K+ and Mg2+ played a crucial role in neutralizing the precipitation acidity. The major ionic sources in the region were terrigenous (Ca2+, HCO3-, and Mg2+) and sea salt (Na+, Cl-, and Mg2+), as well as anthropogenic emissions (SO42- and NO3-) and biomass burning (K+). The total deposition flux of the major ions was higher in 2016 than in 2017 and was influenced by the higher precipitation. The average values of delta O-18 and delta D in precipitation were - 15.22 +/- 5.17 parts per thousand and - 116.01 +/- 41.31 parts per thousand, respectively. The precipitation stable isotopes were not significantly correlated to the local air temperature but the precipitation amount. Moreover, the variation in stable isotopes, local meteoric water line, and d-excess indicated the existence of continental and monsoon moisture transport systems. The transport of chemicals over the high elevation region from polluted cities in South Asia via moisture originating in the Bay of Bengal and the Arabian Sea was determined based on the source identification, clusters of air mass backward trajectory analysis, and the National Center for Environmental Prediction Final dataset. Thus, the ionic concentrations and stable isotopic characteristics of the precipitation from this study provided a valuable dataset to assess the atmospheric environment in the northern slopes of the Himalayas at Southern Tibetan Plateau.
关键词	CHEMICAL-COMPOSITION TIBETAN PLATEAU WET PRECIPITATION ATMOSPHERIC PRECIPITATION URBAN SITE SPATIOTEMPORAL VARIATIONS RAINWATER CHEMISTRY IONIC COMPOSITION SOLUBLE AEROSOLS DRY DEPOSITION
英文关键词	Major ions; Stable isotopes; Wet deposition; Southern Tibetan Plateau
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000517457600001
来源期刊	JOURNAL OF ATMOSPHERIC CHEMISTRY
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/259529
推荐引用方式 GB/T 7714	Adhikari, Subash,Zhang, Fan,Zeng, Chen,et al. Precipitation chemistry and stable isotopic characteristics at Wengguo in the northern slopes of the Himalayas[J]. 中国科学院青藏高原研究所,2019,76(4).
APA	Adhikari, Subash.,Zhang, Fan.,Zeng, Chen.,Tripathee, Lekhendra.,Adhikari, Namita Paudel.,...&Wang, Guanxing.(2019).Precipitation chemistry and stable isotopic characteristics at Wengguo in the northern slopes of the Himalayas.JOURNAL OF ATMOSPHERIC CHEMISTRY,76(4).
MLA	Adhikari, Subash,et al."Precipitation chemistry and stable isotopic characteristics at Wengguo in the northern slopes of the Himalayas".JOURNAL OF ATMOSPHERIC CHEMISTRY 76.4(2019).