Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Journal of Glaciology and Geocryology》 2011-02
Add to Favorite Get Latest Update

Characterization and Quantification of Within-year Variation of Snow-Cover Elevation in Mountainous Regions,Eastern Tibet

GAO Jie1,FU Xu-dong1,GONG Tong-liang1,2,WANG Guang-qian1, WANG Yuan-jian1,WANG Hao1 (1.State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing 100084,China; 2.Tibet Bureau of Water Resources,Lhasa Tibet 850000,China)  
Fluctuating snow-covered elevation(FSCE) was conceptualized and proposed to characterize within-year variation of the border between snow-covered area and snow-free area in mountainous regions.Two parameters,namely median of the snow-free period(Tm) and duration of snow-free period(DT),were defined to quantify FSCE.A regression model of FSCE was developed for the Lhasa River basin,Niyang River basin and Changdu Prefecture in Eastern Tibet.Statistical analyses of the snow-products data with a spatial resolution of 25 km×25 km show that: 1) Tm correlates insignificantly with geographical and topographic factors,having the yearly mean value of July 31;2) DT correlates significantly with the average elevation of the snow-products cell,having the yearly mean value of nearly five months(i.e.,151 days);3) in the region snow melting begins in last April and snow cover begins in mid November;from last June to mid September there is a snow-free period and from December to March in the next year there is a snow-cover period.In addition,snow-products with higher spatial resolution will be helpful to characterize FSCE in smaller spatial scales.
【Fund】: 科技部"十一五"科技支撑计划项目(2007BAC06B06)资助
【CateGory Index】: P426.635
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved