气候变化领域集成服务门户(CCPortal): Seasonal differences in snow chemistry from the vicinity of Mt. Everest, central Himalayas

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DOI	10.1016/j.atmosenv.2004.02.043
	Seasonal differences in snow chemistry from the vicinity of Mt. Everest, central Himalayas
	Kang, SC; Mayewski, PA; Qin, DH; Sneed, SA; Ren, JW; Zhang, DQ
发表日期	2004
ISSN	1352-2310
起始页码	2819
结束页码	2829
卷号	38 期号:18
英文摘要	During August and September 1998, fresh snow samples were collected in the East Rongbuk (ER) Glacier on the northern slope of Mt. Everest over an elevation range 5800-6500 m. Three snowpits were sampled in the ER glacier at an elevation of 6400, 6500, and 6500 m in August 1998, May 2000 and October 2002, respectively. Snow chemical data from fresh snow and snowpit samples from the ER Glacier are shown to be consistent with earlier results reported by other researchers from the vicinity of Mt. Everest. Among major ions, Ca2+ has the most striking seasonal differences: non-monsoon snow Ca2+ concentration is one order of magnitude higher than monsoon value. A large seasonal difference characterizes fresh snow SO42- but does not seem to persist in snowpit samples probably as a consequence of post-depositional ion elution. Non-monsoon snow Na+, K+ and Cl- are close to two times higher than monsoon snow for both fresh snow and snowpit samples. Magnesium has distinct seasonal variations in snowpit samples and a fourfold higher concentration in non-monsoon snow than that in monsoon snow. Seasonal differences in major chemical composition in snow over the Mt. Everest region provide a definitive indicator for precisely dating ice cores and as a consequence are essential in reconstructing the history of climate change and atmospheric chemistry in this region. (C) 2004 Elsevier Ltd. All rights reserved.
关键词	QOMOLANGMA MOUNT EVEREST SUMMER MONSOON SEASON CHEMICAL-COMPOSITION ICE-CORE FRESHSNOW SAMPLES TIBETAN PLATEAU DASUOPU GLACIER XIXABANGMA PEAK RECORDS DUST
英文关键词	fresh snow; snowpit; major ions; seasonal variations; Mt. Everest region
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:000221422400006
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/158715
推荐引用方式 GB/T 7714	Kang, SC,Mayewski, PA,Qin, DH,et al. Seasonal differences in snow chemistry from the vicinity of Mt. Everest, central Himalayas[J]. 中国科学院青藏高原研究所,2004,38(18).
APA	Kang, SC,Mayewski, PA,Qin, DH,Sneed, SA,Ren, JW,&Zhang, DQ.(2004).Seasonal differences in snow chemistry from the vicinity of Mt. Everest, central Himalayas.ATMOSPHERIC ENVIRONMENT,38(18).
MLA	Kang, SC,et al."Seasonal differences in snow chemistry from the vicinity of Mt. Everest, central Himalayas".ATMOSPHERIC ENVIRONMENT 38.18(2004).