自然资源学报 ›› 2011, Vol. 26 ›› Issue (5): 836-846.doi: 10.11849/zrzyxb.2011.05.011

• 资源评价 • 上一篇    下一篇

1980—2007年喜马拉雅东段洛扎地区冰湖变化遥感研究

李治国1,2, 姚檀栋2, 叶庆华2, 李潮流2, 王伟财2   

  1. 1. 商丘师范学院 环境与规划系, 河南 商丘 476000;
    2. 中国科学院 青藏高原研究所, 北京 100085
  • 收稿日期:2010-03-28 修回日期:2010-11-30 出版日期:2011-05-20 发布日期:2011-05-20
  • 作者简介:李治国(1979- ),男,山东禹城人,博士,主要从事资源环境变化及其对区域发展的影响研究。 E-mail:lizhiguo999999@163.com
  • 基金资助:

    国家自然科学基金项目(40810019001);中国科学院对外国际合作重点项目(GJHZ0906);国家自然科学基金青年基金项目 (40701036)。

Monitoring Glacial Lake Variations Based on Remote Sensing in the Lhozhag District,Eastern Himalayas,1980-2007

LI Zhi-guo1,2, YAO Tan-dong2, YE Qing-hua2, LI Chao-liu2, WANG Wei-cai2   

  1. 1. Department of Environmental Sciences and Planning, Shangqiu Normal University, Shangqiu 476000, China;
    2. Institute of Tibetan Plateau Research, CAS, Beijing 100085, China
  • Received:2010-03-28 Revised:2010-11-30 Online:2011-05-20 Published:2011-05-20

摘要: 利用1980年地形图、1988/1990年Landsat TM、2000年Landsat ETM+、2007年ALOS AVNIR-2遥感资料和近42 a (1967—2008年)的气温、降水量资料对喜马拉雅东段洛扎地区的冰湖变化特征及其原因进行了研究。 结果表明:①1980年到2007年,53个冰湖(1980年面积大于0.02 km2)的总面积由1980年的9.97 km2增加至2007年的13.05 km2,增加了3.08 km2,增加的比例为30.9%。通过与非冰川补给湖的对比发现,1980年的冰湖面积比非冰川补给湖的面积大,分布的规模等级和海拔梯度更为广泛;1980—2007年冰湖面积扩张是非冰川补给湖面积扩张的102.7倍,远大于后者。可见,冰川补给对于冰湖的分布和变化有重要的影响。②1980—2007年,错那站的年平均气温呈波动上升趋势,与全球变暖的趋势一致;年降水量在波动变化中略有上升。温度升高引起的冰川融水的增加和降水的增加共同决定了研究区内冰湖面积的增长。本区冰川变化和冰湖变化主要是由温度升高引起的,但降水增加也有一定贡献。③对研究区2007年面积大于0.1 km2的32个可辨识冰湖的溃决危险性评价表明,错嘎龙浦、加朗卡、昂格错、白朗错几个冰湖的溃决危险程度最大。

关键词: 冰湖变化, 冰川变化, 遥感, 喜马拉雅, 洛扎地区

Abstract: Based on the datasets of topographic maps of 1980, Landsat TM of 1988/1990, Landsat ETM+of 2000, and ALOS AVNIR-2 of 2007 as well as 42 years (1967-2008) temperature and precipitation data in the Lhozhag District of the eastern Himalayas, the characteristics of glacial lake change and its reason were investigated. The results show that: 1) The total area of 53 glacial lakes (with an area larger than 0.02 km2 in 1980) increased from 9.97 km2 in 1980 to 13.05 km2 in 2007. The overall increase was 3.08 km2, which was 30.9% of the total glacial lake area in 1980. Compared with the non-glacial-fed lakes, the area of glacial lakes in 1980 was found larger than the latter, and was distributed in more grades and elevation gradients. Moreover, area expansion during 1980-2007 of glacial lakes was as large as 102.7 times that of the non-glacial-fed lakes, much larger than the latter. It shows that the distribution and change of glacial lakes were affected deeply by glacier-meltwater supply. 2) During the period of 1980-2007, the average annual temperature of Cona Station increased significantly, which was in agreement with the trend of global warming elsewhere. The annual precipitation in Cona Station increased a little during 1980-2007. Therefore, the increase of glacial meltwater caused by rising temperature and increasing precipitation in the study area jointly determined the expansion of glacial lakes. Increased annual temperature acted as the most significant factor for recent glacial lake expansion in the Lhozhag District, while increased precipitation made some contributions, too. 3) The risk assessment of outburst probability for 32 recognizable glacial lakes larger than 0.1 km2 in 2007 shows that Cuogalongpu, Jialangka, Angge and Bailang lakes were in the highest rank of outburst in the study area.

Key words: glacial lake variations, glacier variations, remote sensing, Himalaya, Lhozhag District

中图分类号: 

  • P931.4