摘要
以Landsat影像为数据源,通过遥感图像计算机辅助分类和目视解译方法,提取中国西部对气候变化最为敏感的西藏东南部海洋型冰川区(岗日嘎布地区)2005年,2013年冰川边界,分析了冰川变化特征及冰川变化与气候变化的响应关系。结果表明:2005—2013年冰川面积减少72.28km2,占2005年冰川面积的15.75%;冰川分布的下限海拔高度升高61m。结合气象资料分析认为,降水量是冰川发育规模的主要影响因素,而温度是冰川发育数量的主要影响因素,升温是研究区近年来冰川加速退缩的主要原因。由此预测未来冰川消融速率会进一步加快。
The maritime glaciers in the Gangrigabu Range are the most sensitive to climate change in China.Landsat data were processed by using a method of band ratio to extract the glacier boundaries in 2005and2013.The lower limit altitude of glaciers distribution increased 61 meters.And it was concluded that the area of the glaciers in the Gangrigabu Range decreased by 72.28km2(15.75%)from 2005 to 2013.Precipitation was the main factor influencing glacier scale and temperature was the main factor influencing glacier number.The most important reason for glacial retreat was rising temperature.It is estimated that the glacier retreat rate will accelerate.
出处
《水土保持研究》
CSCD
北大核心
2014年第4期233-237,共5页
Research of Soil and Water Conservation
基金
国家自然科学基金项目(41271024
40871057)
关键词
冰川变化
气候响应
遥感
岗日嘎布山脉
glacier change
climate response
remote sensing
Gangrigabu
