Arid
DOI10.1016/j.jseaes.2009.08.006
Spatial and seasonal variation of major ions in Himalayan snow and ice: A source consideration
Liu, Ya-ping; Geng, Zhi-xing; Hou, Shu-gui
通讯作者Hou, Shu-gui
来源期刊JOURNAL OF ASIAN EARTH SCIENCES
ISSN1367-9120
EISSN1878-5786
出版年2010
卷号37期号:2页码:195-205
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.


英文关键词Himalayas Snow pits Ice cores Major ions Distribution HYSPLIT_4 model Atmospheric circulation
类型Article
语种英语
国家Peoples R China
收录类别SCI-E
WOS记录号WOS:000271837200009
WOS关键词EAST RONGBUK GLACIER ; CHEMICAL-COMPOSITION ; TIBETAN PLATEAU ; MT. EVEREST ; CLIMATIC SIGNIFICANCE ; FRESHSNOW SAMPLES ; HIGH-ALTITUDE ; SOUTH-ASIA ; MONSOON ; CORE
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
来源机构中国科学院西北生态环境资源研究院 ; 南京大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/165014
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]. 中国科学院西北生态环境资源研究院, 南京大学,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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