| 1973—2010年基于RS和GIS的马兰冰川退缩与气候变化关系研究 |
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| 引用本文： | 姜珊,杨太保,田洪阵.1973—2010年基于RS和GIS的马兰冰川退缩与气候变化关系研究[J].冰川冻土,2012,34(3):522-529. |
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| 作者姓名： | 姜珊 杨太保 田洪阵 |
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| 作者单位： | 兰州大学西部环境教育部重点实验室,资源环境学院冰川与生态地理研究所,甘肃兰州730000;兰州大学西部环境教育部重点实验室,资源环境学院冰川与生态地理研究所,甘肃兰州730000;兰州大学西部环境教育部重点实验室,资源环境学院冰川与生态地理研究所,甘肃兰州730000 |
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| 摘 要： | 以1973—2010年的RBV、MSS、TM和ETM+遥感资料为信息源,通过遥感图像处理技术和目视解译方法提取冰川界限,应用GIS技术分析了位于昆仑山中段的马兰冰帽近37a冰川面积变化.结果表明:1973—2010年马兰冰帽呈退缩趋势,冰川面积减少了6.04%;冰川退缩经历由快-慢-快-慢的过程,近10a冰川退缩不显著,体现冰川变化的一个转型时期.在研究期内,马兰冰帽南北向退缩690.4m,东西向退缩84.29m.研究表明:马兰冰帽退缩的关键因素是气候变暖,年降水量的增加不能够抵消由夏季温度剧烈上升导致的冰川消融.此外,地形条件、冰川规模都是影响冰川波动的重要因素.
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| 关 键 词： | 马兰冰帽 冰川退缩 气候变化 地理信息系统 遥感 |
Glacier Shrinkage and Its Dependence on Climate in the Malan Mountain in Past 40Years Based on RS and GIS |
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| JIANG Shan,YANG Tai-bao,TIAN Hong-zhen.Glacier Shrinkage and Its Dependence on Climate in the Malan Mountain in Past 40Years Based on RS and GIS[J].Journal of Glaciology and Geocryology,2012,34(3):522-529. |
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| Authors: | JIANG Shan YANG Tai-bao TIAN Hong-zhen |
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| Institution: | (Key Laboratory of Western China’s Environmental Systems(Ministry of Education),Lanzhou University,Institute of Glaciology and Ecogeography College of Earth and Environmental Sciences,Lanzhou Gansu 730000,China) |
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| Abstract: | The Malan Ice Caps are located at the central part of the Kunlun Mountains.In this study,serial RBV,MSS,TM and ETM+ Landsat data from 1973 to 2010 were used to map the glacier extents by applying remote sensing(RS) and visual interpretation.After constructing the glacier maps,the details of glaciers change during the last 37 years were obtained by using GIS tools.The results show that the Malan Ice Caps experienced a general shrinkage,the total glacierized area decreased by 6.8% from 1973 to 2010.The glacier retreat included a fast-slow-fast-slow process,with an insignificant retreat in recent decade,which reflected a transitional period of glacier change.In this retreat period,the glacier shrank 690.4 m in the south-north direction,and 84.29 in the east-west direction.By analyzing the climate records(annual mean temperature,summer mean temperature and annual precipitation) and glacier variation in the research area,it is found that glacier changes are a response to summer temperature increase.Annual precipitation also showed an upward trend,but had not compensated the mass loss due to ablation.Besides,topographic condition and the scale of glacier are key factors for glacier changes as well. |
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| Keywords: | Malan Ice Caps glacier shrinkage climate change RS GIS |
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