• 研究论文 •

1978-2015年喀喇昆仑山克勒青河流域冰川变化的遥感监测

1. 兰州大学资源环境学院,冰川与生态地理研究所,兰州 730000
• 收稿日期:2015-12-01 修回日期:2016-05-01 出版日期:2016-07-20 发布日期:2016-07-20
• 通讯作者: 杨太保 E-mail:yangtb@lzu.edu.cn
• 作者简介:

作者简介：许艾文(1992-),女,湖北十堰人,硕士研究生,研究方向为冰川变化与气候响应,E-mail: xuaw92@163.com

• 基金资助:
基金项目：国家自然科学基金项目(41271024); 兰州大学地理学基地科研训练及科研能力提高项目(J1210065)

Variation of glaciers in the Shaksgam River Basin, Karakoram Mountains during 1978-2015

Aiwen XU, Taibao YANG*(), Congqiang WANG, Qin JI

1. Institute of Glaciology and Ecogeography, College of Earth and Environmental Science, Lanzhou University, Lanzhou 730000, China
• Received:2015-12-01 Revised:2016-05-01 Online:2016-07-20 Published:2016-07-20
• Contact: Taibao YANG E-mail:yangtb@lzu.edu.cn
• Supported by:
Foundation: National Natural Science Foundation of China, No.41271024;Scientific Research Training and Scientific Research Ability Improvement Project of Geography Base of Lanzhou University, No.J1210065

Abstract:

Based on Landsat MSS/TM/ETM+/OLI images of 1978, 1991, 2001, and 2015, glacier boundaries in the Shaksgam River Basin, Karakoram Mountains were extracted using computer aided image classification and visual interpretation methods, and the changes of glaciers in the study area were analyzed. The results show that the total area of glaciers in the study area was reduced from 1821.70 km2 to 1675.92 km2 during 1978-2015, by 145.78 km2, or 8% of the total area of glaciers. Under the background of climate warming, however, the rate of glacier retreating shifted from fast to slow in nearly 40 years. In the study area, the glacier retreat rate on the southeastern aspect was significantly higher than on the northwestern aspect. Glacier retreat rate decreased with the increase of scale of glaciers. There were 27 typical glaciers that clearly progressed during 1978-2015, with areas and lengths significant increased. Among these, the velocity of change for the western side of the Wood stark glacier was 904 m/a during 1996-1998, the velocity of change for the eastern side of the K2 glacier was 446 m/a during 2007-2009, and the velocity of change for the 5Y654D497 glacier was 238 m/a during 1978-1990, respectively. These three glaciers seem to be the surge-type glacier. By analyzing the climate records and glacier variation in the study area, it was concluded that higher temperatures led to the glacier retreat of the study area, but increasing rainfall to some extent inhibited glacier retreat. Topographic condition and the scale of glacier were key factors for glacier changes as well.