气候变化领域集成服务门户(CCPortal): Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau

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DOI	10.5194/acp-21-8357-2021
	Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau
	Wang K.; Hattori S.; Lin M.; Ishino S.; Alexander B.; Kamezaki K.; Yoshida N.; Kang S.
发表日期	2021
ISSN	1680-7316
起始页码	8357
结束页码	8376
卷号	21 期号:10
英文摘要	As an important atmosphere constituent, sulfate aerosols exert profound impacts on climate, the ecological environment, and human health. The Tibetan Plateau (TP), identified as the Third Pole , contains the largest land ice masses outside the poles and has attracted widespread attention for its environment and climatic change. However, the mechanisms of sulfate formation in this specific region still remain poorly characterized. An oxygen-17 anomaly (117O) has been used as a probe to constrain the relative importance of different pathways leading to sulfate formation. Here, we report the 117O values in atmospheric sulfate collected at a remote site in the Mt. Everest region to decipher the possible formation mechanisms of sulfate in such a pristine environment. Throughout the sampling campaign (April September 2018), the 117O in non-dust sulfate show an average of 1:7%-0:5 %, which is higher than most existing data on modern atmospheric sulfate. The seasonality of 117O in non-dust sulfate exhibits high values in the premonsoon and low values in the monsoon, opposite to the seasonality in 117O for both sulfate and nitrate (i.e., minima in the warm season and maxima in the cold season) observed from diverse geographic sites. This high 117O in non-dust sulfate found in this region clearly indicates the important role of the S.IV/CO3 pathway in atmospheric sulfate formation promoted by conditions of high cloud water pH. Overall, our study provides an observational constraint on atmospheric acidity in altering sulfate formation pathways, particularly in dust-rich environments, and such identification of key processes provides an important basis for a better understanding of the sulfur cycle in the TP. © 2021 EDP Sciences. All rights reserved.
语种	英语
scopus关键词	acidity; aerosol; aerosol composition; atmospheric chemistry; formation mechanism; isotopic composition; seasonality; sulfate; sulfur cycle; China; Himalayas; Khumbu Himal; Mount Everest; Qinghai-Xizang Plateau
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246844
作者单位	State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences (CAS), Lanzhou, 730000, China; Department of Chemical Science and Engineering, School of Materials and Chemical Technology, Tokyo Institute of Technology, 4259 Nagatsuta-cho, Midori-ku, Yokohama, Kanagawa, 226-8502, Japan; State Key Laboratory of Isotope Geochemistry, Guangzhou Institute of Geochemistry, CAS, Guangzhou, 510640, China; National Institute of Polar Research, Research Organization of Information and Systems, Tokyo, 190-8518, Japan; Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195, United States; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, 100101, China; Earth-Life Science Institute, Tokyo Institute of Technology, Meguro-ku, Tokyo, 152-8551, Japan; University of Chinese Academy of Sciences, Beijing, 100049, China; National Institute of Information and Communications Technology, Koganei, Tokyo, 184-8795, Japan; F...
推荐引用方式 GB/T 7714	Wang K.,Hattori S.,Lin M.,et al. Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,21(10).
APA	Wang K..,Hattori S..,Lin M..,Ishino S..,Alexander B..,...&Kang S..(2021).Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(10).
MLA	Wang K.,et al."Isotopic constraints on atmospheric sulfate formation pathways in the Mt. Everest region, southern Tibetan Plateau".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.10(2021).