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基于2009年5月至2011年10月科其喀尔冰川的花杆观测资料,对其消融区的表面运动特征进行分析.结果表明:冰川消融区的年水平运动速度最大值为86.69 m·a-1,年垂直运动速度最大值为15.34 m·a-1,均出现在冰川海拔4 000~4 200 m的消融区上部;在靠近冰川末端的冰舌下部,受冰量补给减弱、厚层表碛覆盖等影响,冰川运动缓慢,年水平运动速度小于5 m·a-1,而垂直运动速度值小于2 m·a-1.大多数横剖面的水平运动速度具有从中部向边缘逐渐减小的特征,而有的剖面却出现局部速度增大的区域.整体而言,冰川水平及垂直运动速度随海拔降低而减小,符合冰川运动的一般规律,但主要受地形作用的影响,垂直运动速度随海拔的变化会出现波动.消融期月水平运动速度与同期气温和降水的变化具有一定的相关性,可能反映出气候快速变化对冰川运动的影响.
The surface movement characteristics of the ablation zone were analyzed based on the observatory data of the Kekejiaer Glacier from May 2009 to October 2011. The results showed that the maximum annual velocity of glacier ablation zone was 86.69 m · a -1, and the maximum annual vertical movement velocity is 15.34 m · a-1, all of which appear in the upper part of the ablation zone where the glacier is 4 000 ~ 4 200 m above sea level. In the lower part of the ice tongue near the end of the glacier, Glacier movement is slow, the annual horizontal velocity is less than 5 m · a-1, while the vertical velocity is less than 2 m · a-1. The horizontal velocity of most cross-sections has a decreasing trend from the middle to the periphery Small features, while some sections show an increase in the local velocity.Overall, the horizontal and vertical glacier velocity decreases with decreasing altitude, which accords with the general law of glacier movement but mainly due to the effect of topography The variation of exercise velocity with altitude will fluctuate.The correlation between the monthly horizontal velocity of ablation period and the change of temperature and precipitation over the same period may reflect the influence of rapid climate change on glacier movement.