Distribution of Borehole Temperature at Four High-altitude Alpine Glaciers in Central Asia

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2009 > Vol6 No.3

	Distribution of Borehole Temperature at Four High-altitude Alpine Glaciers in Central Asia
	Liu Yaping ; Hou Shugui ; Wang Yetang ; Song Linlin
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2009-09
卷号	6 期号:3 页码:221–227
关键词	Borehole temperature Glacier Central Asia Climate warming
ISSN号	1672-6316
通讯作者	Liu, YP
英文摘要	The distribution of borehole temperature at four high-altitude alpine glaciers was investigated. The result shows that the temperature ranges from -13.4 degrees C to -1.84 degrees C, indicating the glaciers are cold throughout the boreholes. The negative gradient (i.e., the temperature decreasing with the increasing of depth) due to the advection of ice and climate warming, and the negative gradient moving downwards relates to climate warming, are probably responsible for the observed minimum temperature moving to lower depth in boreholes of the Gyabrag glacier and Miaoergou glacier compared to the previously investigated continental ice core borehole temperature in West China. The borehole temperature at 10 in depth ranges from -8.0 degrees C in the Gyabrag glacier in the central Himalayas to -12.9 degrees C in the Tsabagarav glacier in the Altai range. The borehole temperature at 10 in depth is 3 similar to 4 degrees higher than the calculated mean annual air temperature on the surface of the glaciers and the higher 10 in depth temperature is mainly caused by the production of latent heat due to melt-water percolation and refreezing. The basal temperature is far below the melting point, indicating that the glaciers are frozen to bedrock. The very low temperature gradients near the bedrock suggest that the influence of geothermal flux and ice flow on basal temperature is very weak. The low temperature and small velocity of ice flow of glaciers are beneficial for preservation of the chemical and isotopic information in ice cores.
语种	英语
公开日期	2013-08-14
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/6023]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2009_Vol6 No.3
推荐引用方式 GB/T 7714	Liu Yaping,Hou Shugui,Wang Yetang,et al. Distribution of Borehole Temperature at Four High-altitude Alpine Glaciers in Central Asia[J]. JOURNAL OF MOUNTAIN SCIENCE,2009,6(3):221–227.
APA	Liu Yaping,Hou Shugui,Wang Yetang,&Song Linlin.(2009).Distribution of Borehole Temperature at Four High-altitude Alpine Glaciers in Central Asia.JOURNAL OF MOUNTAIN SCIENCE,6(3),221–227.
MLA	Liu Yaping,et al."Distribution of Borehole Temperature at Four High-altitude Alpine Glaciers in Central Asia".JOURNAL OF MOUNTAIN SCIENCE 6.3(2009):221–227.