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DOI	10.1016/j.atmosenv.2007.05.024
	Spatial and seasonal variations of elemental composition in Mt. Everest (Qomolangma) snow/firn
	Kang, Shichang; Zhang, Qianggong; Kaspari, Susan; Qin, Dahe; Cong, Zhiyuan; Ren, Jiawen; Mayewski, Paul A.
发表日期	2007
ISSN	1352-2310
起始页码	7208
结束页码	7218
卷号	41 期号:34
英文摘要	In May 2005, a total of 14 surface snow (0-10cm) samples were collected along the climbing route from the advanced base camp to the summit (6500-8844 in a.s.l.) on the northern slope of Mt. Everest (Qomolangma). A 108 in firn/ice core was retrieved from the col of the East Rongbuk Glacier (28.03 degrees N, 86.96 degrees E, 6518 in a.s.l.) on the north eastern saddle of Mt. Everest in September 2002. Surface snow and the upper 3.5 m firn samples from the core were analyzed for major and trace elements by inductively coupled plasma mass spectroscopy (ICP-MS). Measurements show that crustal elements dominated both surface snow and the firn core, suggesting that Everest snow chemistry is mainly influenced by crustal aerosols from local rock or prevalent spring dust storms over southern/central Asia. There are no clear trends for element variations with elevation due to local crustal aerosol inputs or redistribution of surface snow by strong winds during the spring. Seasonal variability in snow/firn elements show that high elemental concentrations occur during the non-monsoon season and low values during the monsoon season. Ca, Cr, Cs, and Sr display the most distinct seasonal variations. Elemental concentrations (especially for heavy metals) at Mt. Everest are comparable with polar sites, generally lower than in suburban areas, and far lower than in large cities. This indicates that anthropogenic activities and heavy metal pollution have little effect on the Mt. Everest atmospheric environment. Everest firn core REE concentrations are the first reported in the region and seem to be comparable with those measured in modern and Last Glacial Maximum snow/ice samples from Greenland and Antarctica, and with precipitation samples from Japan and the East China Sea. This suggests that REE concentrations measured at Everest are representative of the background atmospheric environment. (c) 2007 Elsevier Ltd. All rights reserved.
关键词	SUMMER MONSOON SEASON CHEMICAL-COMPOSITION ICE-CORE TIBETAN PLATEAU FRESHSNOW SAMPLES XIXABANGMA PEAK SNOW CHEMISTRY TRACE-METALS DUST HIMALAYAS
英文关键词	snow/firn; elements; spatial and seasonal variations; Mt. Everest (Qomolangma)
学科领域	Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
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:000250932500005
来源期刊	ATMOSPHERIC ENVIRONMENT
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/111476
推荐引用方式 GB/T 7714	Kang, Shichang,Zhang, Qianggong,Kaspari, Susan,et al. Spatial and seasonal variations of elemental composition in Mt. Everest (Qomolangma) snow/firn[J]. 中国科学院青藏高原研究所,2007,41(34).
APA	Kang, Shichang.,Zhang, Qianggong.,Kaspari, Susan.,Qin, Dahe.,Cong, Zhiyuan.,...&Mayewski, Paul A..(2007).Spatial and seasonal variations of elemental composition in Mt. Everest (Qomolangma) snow/firn.ATMOSPHERIC ENVIRONMENT,41(34).
MLA	Kang, Shichang,et al."Spatial and seasonal variations of elemental composition in Mt. Everest (Qomolangma) snow/firn".ATMOSPHERIC ENVIRONMENT 41.34(2007).