基于遥感与GIS的库克苏河流域冰川变化研究   总被引：5，自引：2，他引：3  

高闻宇  李忠勤  李开明  张明军 《干旱区地理》2011,34(2):252-261

以伊犁河上游库克苏河流域冰川为例,利用1963年地形图、2004年的ASTER数字遥感影像资料及数字高程模型,通过遥感图像处理和分析提取研究区冰川范围,并在地理信息系统技术支持下分析该地区冰川的变化情况.研究表明1963-2004年库克苏河流域冰川整体变化幅度较大,冰川表现为萎缩的趋势,2004年冰川面积、冰储量比19...  相似文献   

Hydrological and climatological glaciers observation 20 years on Tanggula Pass of Tibetan Plateau: its significance and contribution     

TanDong Yao  YinSheng Zhang  JianChen Pu  LiDe Tian  Yutaka. Aget  T. Ohata 《寒旱区科学》2011,3(3):0187-0196

Two decades have passed since China and Japan jointly launched hydrological & climatological observations on the glaciers in Tanggula Pass, Tibetan Plateau. Although the research institutions involved have been either restructured or renamed, their work, between 1989 and 1993, was ground-breaking and remains significant even to this day. Some observation sites established at that time are still utilized for large-scaled projects sponsored by GAME/Tibet, NSFC (Natural Science Foundation of China) and the Major State Basic Research Development Program of China (973 Program). Recently, a glacier monitoring system has been established on the cap of Dongkemadi Glacier, and is expected to make further contributions to research on the change of the cryospheric and climatic environment in the area.  相似文献   

Response of a mid‐latitude cirque glacier to climate over the last two decades: Mangaehuehu Glacier,Mt Ruapehu     

Martin S. Brook  Josh F. Dean  Harry J. R. Keys 《地球表面变化过程与地形》2011,36(14):1973-1980

The recent loss of mountain glaciers in response to climate warming has been reported across a range of latitudes globally, but the processes involved are not always straightforward. In southern Pacific mid‐latitudes, twentieth‐century glacier fluctuations are thought to reflect the strength of westerly atmospheric circulation, which brings increased precipitation, leading to mass gains. We present a study of the response of Mangaehuehu Glacier, a cirque glacier on Mt Ruapehu, to climate over the last two decades. Glacier surface area fluctuated in size over this period, corresponding closely with mean end‐of‐summer snowlines in the Southern Alps. The key control on glacier extent appears to be ablation season temperature, itself controlled by regional atmospheric circulation, including El Niño‐Southern Oscillation, Interdecadal Pacific Oscillation (IPO), and to a lesser extent, Southern Annular Mode (SAM). Copyright © 2011 John Wiley & Sons, Ltd.  相似文献   

1974—2010年雅鲁藏布江源头杰玛央宗冰川及冰湖变化初步研究   总被引：9，自引：5，他引：4  

刘晓尘  效存德 《冰川冻土》2011,33(3):488-496

青藏高原冰川和冰湖是气候变化敏感的指示器.基于1974年的地形图及其生成的DEM数据、1990年和2000年的TM影像、2005年和2010年的ETM+影像、以及2010年和2009年的GPS实测数据,应用3S技术分析了1974—2010年37a来雅鲁藏布江源头杰玛央宗冰川和冰湖的变化特征.结果表明:冰川面积减小了5.02%(21.78km2减小至20.67km2)、冰川末端退缩了768m(速度为21m.a-1);冰湖面积增加了63.7%(0.70km2增加至1.14km2),冰湖体积扩大约9.8×106 m3.普兰县气象站的观测资料表明,近37a来气温呈快速上升趋势,而降雨量明显减少,气候暖干化是杰玛央宗冰川和冰湖变化的主要原因.若该区气候的暖干趋势进一步加剧,必然导致杰玛央宗冰川退缩进一步加剧,冰湖溃决的可能性将会增大.  相似文献   

冰川运动速度影响因子的强度分析——以祁连山七一冰川为例   总被引：3，自引：1，他引：2  

井哲帆  刘力  周在明  邓宇峰 《冰川冻土》2011,33(6):1222-1228

以冰川形态因子变量（面积、长度和厚度）,气候条件因子变量（年气温、降水）,以及年物质平衡量等作为影响因素,采用通径分析方法研究了祁连山七一冰川1958-2007年间年际运动速度的影响因子强度.结果表明：冰川形态对运动速度的影响强度最大,物质平衡的影响次之,而气候条件的影响最弱.在这些影响因素中冰川面积和厚度对运动速度的...  相似文献   

祁连山老虎沟12号冰川辐射各分量年变化特征   总被引：2，自引：0，他引：2  

孙维君  秦翔  徐跃通  吴秀平  刘宇硕  任贾文 《地球科学进展》2011,26(3):347-354

在资料比较稀少的山地冰川进行辐射收支研究对于揭示现代冰川发育的水热条件以及冰川与气候的相互关系具有重要意义.利用祁连山老虎沟12号冰川海拔5 040 m自动气象站资料,分析了2008年10月20日至2009年10月19日的辐射各分童年变化和平均日变化特征,结果表明:整年气温月平均值都高于冰川表面温度,大气是冰川的感热热...  相似文献   

Mechanisms and Simulation of Accelerated Shrinkage of Continental Glaciers: A Case Study of Urumqi Glacier No. 1 in Eastern Tianshan, Central Asia     

李忠勤  李慧林  陈亚宁 《中国地质大学学报(英文版)》2011,(4)

Similar to most mountain glaciers in the world, Urumqi Glacier No. 1 (UG1), the best observed glacier in China with continued glaciological and climatological monitoring records of longer than 50 years has experienced an accelerated recession during the past several decades. The purpose of this study is to investigate the acceleration of recession. By taking UG1 as an example, we analyze the generic mechanisms of acceleration of shrinkage of continental mountain glaciers. The results indicate that the accel...  相似文献   

On the Relationship between Local Topography and Small Glacier Change under Climatic Warming on Mt. Bogda, Eastern Tian Shan, China     

李开明  李慧林  王林  高闻宇 《中国地质大学学报(英文版)》2011,(4)

Glacial features in the geological record provide essential clues about past behavior of climate. Of the numerous physical systems on earth, glaciers are one of most responsive to climate change, especially small glaciers, their direct marginal response taking only a few years or decades to be expressed. Accelerating recession of modern glaciers raises the issue of the climate’s impact on water runoff. Data based on topographic maps and Advanced Spaceborne Thermal Emission and Radiometer (ASTER) imagery sho...  相似文献   

祁连山七-冰川反照率的参数化研究   总被引：6，自引：6，他引：0  

蒋熹  王宁练  贺建桥  宋高举  杨胜朋  武小波 《冰川冻土》2011,33(1):30-37

通过对2006年和2007年暖季消融期七一冰川反照率的观测资料分析,基于冰川反照率的变化规律及其影响因素,根据实测资料的统计建模和验证,初步给出了具有试验基础的冰川反照率多因子参数化公式,其时间分辨率为1 h.经检验,2006年和2007年考察期间冰川反照率的模拟值和观测值序列之间的相关系数分别达到了0.901和0.9...  相似文献   

独库公路冰川泥石流分布及其特征     

朱守森  邓晓峰 《山地学报》1995,(3)

对独库公路冰川泥石流的考察及重点泥石流沟的观测，摸清了９条泥石流沟的分布，泥石流发生概况、危害和形成的水文气象条件。以实测资料分析了公路沿线冰川泥石流运动规律基本特征和形成机制。参与泥石流形成的主要水源为融雪水、冰崩和冰川融水，其次是暴雨和冰川融水的叠加所形成的洪水，实测最大容重为２．４６ｇ／ｃｍ￣３。  相似文献