干旱区生态环境知识资源中心(Arid): 近50a来天山博格达峰地区四工河4号冰川表面高程变化特征

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	近50a来天山博格达峰地区四工河4号冰川表面高程变化特征
其他题名	Ice surface-elevation changes of Glacier No.4 of Sigong River in Bogda,Tianshan Mountains,during the last 50 years
	王璞玉 1; 李忠勤 1; 曹敏 2; 李慧林 1; 王飞腾 1; 张明军 1
来源期刊	干旱区地理
ISSN	1000-6060
出版年	2011
卷号	34 期号:3 页码:464-470
中文摘要	基于GIS技术，利用GPS测量数据和1962年地形图分别建立两期DEM，通过对比重点研究了四工河4号冰川1962-2009年冰舌区的表面高程变化特征。结果表明:1962-2009年间，冰舌区平均减薄1510 m，年均减薄约0．320．2 m，冰储量亏损达(14．39．5)10~(-3)km~3，折合水当量(12．98．6)10~(-3)km~3。不同海拔、坡度区间冰面高程变化差异显著，海拔较低、坡度较缓区域的变化最为强烈。在气候变暖的趋势下，四工河4号冰川发生强烈消融，标志着博格达峰地区的冰川正处于物质严重亏损的状态，直接影响到流域水资源状况。
英文摘要	Mountain glaciers are important water resources in the arid region and their mass loss or accumulation directly influence the water runoff.In addition,glaciers are one of potential climate indicators because they are sensitive to climate changes.Bogda is the biggest glaciation area in the eastern Tianshan Mountains and the glacier changes in this region directly influence water resources,living environment and other aspects,which have attracted wide attention of many researchers at home and abroad.Therefore,in the context of global warming,it is urgent to study the glacier changes in this region.In 2009,a large-scale scientific expedition was taken in Bogeda by staffs of Tianshan Glaciological Station and Glacier No.4 of the Sigong River was measured by high accuracy Real Time Kinematic - Global Position System (RTK - GPS).In this paper,ice surface-elevation changes of Glacier No.4 of the Sigong River from 1962 to 2009 had were studied by comparing the DEMs in the two periods,which were established from the GPS surveying data in 2009 and the topographic map (1:50 000)in 1962,respectively.The study of ice surface-elevation changes can be used to estimate the mass loss or accumulation by calculating changes in ice thickness and ice volume,which is an effective method to estimate mass balance of glaciers lack of long-term observations,supplying reliable data for the evaluation of water resources accordingly.Moreover,ice surface-elevation changes within different ranges of elevation and slope were also analyzed in detail.Results indicated that the ice surface-elevation of the tongue area was decreased by 15 10 m with a rate of 0.32 0.2 m · a~(-1)during 1962 -2009.It can be calculated that the wasting ice volume caused by the glacier thinning reaches to (14.3 9.5)x 10~(-3)km~3,corresponding to (12.9 8.6)x 10~(-3)km~3 water equivalent.That is to say,Glacier No.4 of the Sigong River supplied water runoff of (12.9 8.6)x 10~(-3)km~3 at least in the past 50 years.Analysis shows that there is considerable variability of ice surface-elevation changes within different range of elevation and slope.The changes of ice surface-elevation are especially intense at low elevations and on small slopes.During the past several decades,due to climatic warming,Glacier No.4 of the Sigong River was in the state of rapid thinning,retreating,shrinkage and ice volume wasting,which obviously represents that glaciers in Bogda are experiencing serious mass losses and will make a direct impact on water resources.
中文关键词	四工河4号冰川 ; 博格达峰地区 ; 冰面高程变化
英文关键词	GPS GIS Glacier No.4 of Sigong River Bogda ice surface-elevation changes GPS GIS
语种	中文
国家	中国
收录类别	CSCD
WOS类目	GEOSCIENCES MULTIDISCIPLINARY
WOS研究方向	Geology
CSCD记录号	CSCD:4219575
来源机构	西北师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226458
作者单位	1.西北师范大学地理与环境科学学院, 冰冻圈科学国家重点实验室, 兰州, 甘肃 730000, 中国; 2.西北师范大学地理与环境科学学院, 兰州, 甘肃 730070, 中国
推荐引用方式 GB/T 7714	王璞玉,李忠勤,曹敏,等. 近50a来天山博格达峰地区四工河4号冰川表面高程变化特征[J]. 西北师范大学,2011,34(3):464-470.
APA	王璞玉,李忠勤,曹敏,李慧林,王飞腾,&张明军.(2011).近50a来天山博格达峰地区四工河4号冰川表面高程变化特征.干旱区地理,34(3),464-470.
MLA	王璞玉,et al."近50a来天山博格达峰地区四工河4号冰川表面高程变化特征".干旱区地理 34.3(2011):464-470.