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	Spatial and seasonal variation of major ions in Himalayan snow and ice: A source consideration
	Liu, Ya-ping; Geng, Zhi-xing; Hou, Shu-gui
刊名	JOURNAL OF ASIAN EARTH SCIENCES
	2010-01-26
卷号	37期号:2页码:195-205
关键词	Himalayas Snow pits Ice cores Major ions Distribution HYSPLIT_4 model Atmospheric circulation
ISSN号	1367-9120
DOI	10.1016/j.jseaes.2009.08.006
通讯作者	Hou, Shu-gui(shugui@lzb.ac.cn)
英文摘要	The spatial and temporal variation of major ions (Ca2+, Mg2+, Na+, K+ NH4+, SO42-, NO3- and Cl-) in Himalayan snow and ice is investigated by using two snow pits from the East Rongbuk glacier (28 degrees 01'N, 86 degrees 58'E, 6500 m a.s.l.), one snow pit from the Nangpai Gosum glacier (28 degrees 03'N, 86 degrees 39'E, 5700 m a.s.l.), one snow pit from the Gyabrag glacier (28 degrees 11N, 86 degrees 38'E, 6303 m a.s.l.), and three ice cores from the Sentik (35 degrees 59'N, 75 degrees 58'E, 4908 m a.s.l.), Dasuopu (28 degrees 33'N, 85 degrees 44'E, 7000 m a.s.l.), and East Rongbuk (27 degrees 59'N, 86 degrees 55'E, 6450 m a.s.l.) glaciers, respectively. In general, the major ions show a significant seasonal variation, with high concentrations during the non-monsoon (pre-monsoon and post-monsoon) season and relatively low concentrations during the monsoon season. Monsoon precipitation with high local/regional dust loading related to summer circulation is possibly responsible for the high concentrations occurring sporadically during the monsoon season. The crest of the Himalayas is an effective barrier to the spatial distribution of Na+ Cl- and NH4+ concentrations, but not to the major ions associated with dust influx (e.g. Ca2+ and Mg2+). Atmospheric backward trajectories from the HYSPLIT_4 model used in identifying chemical species sourcing suggest that the major ions in the Himalayan snow and ice come mainly from the Thar Desert located in the North India, as well as West Asia, or even the distant Sahara Desert in the North Africa during the winter and spring seasons. This is different from the conventionally assumed and and semi-arid regions of the central Asia. Factors, such as different vapor sources due to atmospheric circulation patterns and geographical features (e.g. altitude, topography), may contribute to the differences in major ionic concentrations between the western and eastern Himalayas. (C) 2009 Elsevier Ltd. All rights reserved.
收录类别	SCI
WOS关键词	EAST RONGBUK GLACIER ; CHEMICAL-COMPOSITION ; TIBETAN PLATEAU ; MT. EVEREST ; CLIMATIC SIGNIFICANCE ; QOMOLANGMA EVEREST ; FRESHSNOW SAMPLES ; HIGH-ALTITUDE ; SOUTH-ASIA ; MONSOON
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000271837200009
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556344
专题	寒区旱区环境与工程研究所
通讯作者	Hou, Shu-gui
作者单位	Chinese Acad Sci, State Key Lab Cryospher Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Liu, Ya-ping,Geng, Zhi-xing,Hou, Shu-gui. Spatial and seasonal variation of major ions in Himalayan snow and ice: A source consideration[J]. JOURNAL OF ASIAN EARTH SCIENCES,2010,37(2):195-205.
APA	Liu, Ya-ping,Geng, Zhi-xing,&Hou, Shu-gui.(2010).Spatial and seasonal variation of major ions in Himalayan snow and ice: A source consideration.JOURNAL OF ASIAN EARTH SCIENCES,37(2),195-205.
MLA	Liu, Ya-ping,et al."Spatial and seasonal variation of major ions in Himalayan snow and ice: A source consideration".JOURNAL OF ASIAN EARTH SCIENCES 37.2(2010):195-205.

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