气候变化领域集成服务门户(CCPortal): Two decades ammonium records from ice core in Qiangyong glacier in the Northern Himalayas

CCPortal

DOI	10.1016/j.atmosres.2019.02.004
	Two decades ammonium records from ice core in Qiangyong glacier in the Northern Himalayas
	Tian R.; Tian L.
发表日期	2019
ISSN	0169-8095
起始页码	36
结束页码	46
卷号	222
英文摘要	The increase in anthropogenic emissions and associated climate change have become a growing critical environmental concern, with significant implications for human health and ecological security. The rapid economic growth in South Asia has contributed additional stress on the atmospheric environment in the surrounding regions. Earlier ice core chemical studies revealed a strong atmospheric transport to the Himalayan region from South Asia through the Indian summer monsoon. Continuous observation of atmosphere chemistry is not yet available, while ice core chemical record from high mountain regions can serve as an alternative proxy. So far, the influence of these transports on the southern Tibetan Plateau has not been adequately evaluated as only a few glaciochemical records are rebuilt. Here, we present a chemical record from a shallow ice core (with depth of 21.4 m), which was retrieved from the Qiangyong Glacier in the rain-shadow area of the Himalayas drilled in 2009and dated back to the past 23 years of 1987–2009. The primary objective was to retrieve glaciochemical record and establish possible sources of soluble components, in particular those of NH 4 + . Empirical orthogonal function (EOF) analysis on the eight major ions series (Ca 2+ , Na + , Mg 2+ , NH 4 + , K + , Cl − , NO 3 − , SO 4 2− ) from this core reveals that NH 4 + is loaded primarily separately on EOF3, likely suggesting a specific source out of the other ion signals. Both a back-trajectory model and the correlation analysis between NH 4 + and SO 4 2− indicate the anthropogenic origin from South Asia. Although earlier ice core records showed a curbed increasing trend in NH 4 + , our new data reveals that the increasing trend continued after 1980 and experienced a rapid increase after 2000. This trend is in accordance with the increasing population and agriculture activities in South Asia, corresponding with increasing anthropogenic emission. Spatial comparison of the Qiangyong ice core record with existing NH 4 + records from other ice cores in the Tibetan Plateau show that concentrations of NH 4 + are regionally increasing. However, the relatively small rise in Qiangyong record is probably in association with the effective transportation barrier of the Himalayas. This study advances the knowledge of atmospheric environmental change in the northern Himalayas and the air mass transport of anthropogenic pollutants from South Asia to the southern Tibetan Plateau via the summer Indian monsoon. © 2019 Elsevier B.V.
英文关键词	Ammonium; Glaciochemical record; Ice core; South Asia; Tibetan Plateau
语种	英语
scopus关键词	Atmospheric chemistry; Atmospheric movements; Atmospheric thermodynamics; Climate change; Economics; Forestry; Orthogonal functions; Ammonium; Glaciochemical records; Ice core; South Asia; Tibetan Plateau; Ice; ammonium; anthropogenic source; atmospheric chemistry; atmospheric transport; concentration (composition); decadal variation; empirical orthogonal function analysis; glaciochemistry; ice core; China; Qiangyong Glacier; Qinghai-Xizang Plateau; Xizang
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162255
作者单位	Institute of International Rivers and Eco-Security, Yunnan University, Kunming, 650091, China; Yunnan Key Laboratory of International Rivers and Transboundary Eco–security, Kunming, 650091, China; Key Laboratory of Tibetan Environment Changes and Land Surface Processes, Chinese Academy of Sciences, Institute of Tibetan Plateau Research, Beijing, 100101, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China
推荐引用方式 GB/T 7714	Tian R.,Tian L.. Two decades ammonium records from ice core in Qiangyong glacier in the Northern Himalayas[J],2019,222.
APA	Tian R.,&Tian L..(2019).Two decades ammonium records from ice core in Qiangyong glacier in the Northern Himalayas.Atmospheric Research,222.
MLA	Tian R.,et al."Two decades ammonium records from ice core in Qiangyong glacier in the Northern Himalayas".Atmospheric Research 222(2019).