祁连山托来南山6号冰川雷达测厚与冰储量分析

冰川厚度测量是冰储量估算的关键。基于2019年7月利用探地雷达在托来南山6号冰川主冰川的测厚结果，通过普通克里格法绘制了主冰川的冰厚分布图，计算出主冰川的平均厚度为（39.61±5.32） m，冰厚空间分布呈自边缘向中间逐渐增厚的特征，最大冰厚［（100.78±1.78） m］位于纵剖面海拔4 770 m附近的凹陷盆地，结合半物理公式估算出整条冰川的冰储量为（0.0504±0.0082） km³。冰床为典型槽谷地形，谷槽横剖面呈U形，且随海拔的升高谷槽宽度逐渐变小。现有的面积-体积公式并不适用于单条冰川的冰储量估算，但分类型拟合公式具有降低估算结果误差的潜力。

Analysis of ice thickness sounded by ground penetrating radar and ice volume of Tuolainanshan Glacier No. 6 in the Qilian Mountains

The measurement of ice thickness is the key to the ice volume estimation. In 2019， a ground penetrating radar system （with a 100 MHz antenna） was used to sound ice thickness along one longitudinal transect and eight transverse transects on the trunk glacier of Tuolainanshan Glacier No. 6 in the Qilian Mountains. The map of ice thickness distribution of trunk glacier was acquired by using ordinary Kriging method， the spatial ice thickness gradually thickening from margin to inner， and the average ice thickness was found to be about （39.61±5.32） m. The total ice volume ［（0.0504±0.0082） km³］ of Tuolainanshan Glacier No. 6 was estimated by combine with shallow ice approximation， and the maximum thickness ［（100.78±1.78） m］ was sounded in the depressed basin located near the 4 770 m a.s.l. of longitudinal transect. The transverse transects of ice bed was typical U-shape， and the width of glacier valley decreases with rising elevation. The existing volume-area scaling of glaciers was not suitable for estimation of the ice volume for single glacier， but the scaling fitting by glacier shape had the potential to reduce the error of the estimated results.