Direct measurement of glacier thinning on the southern Tibetan Plateau (Gurenhekou, Kangwure and Naimona'Nyi glaciers)
Direct measurement of glacier thinning on the southern Tibetan Plateau (Gurenhekou, Kangwure and Naimona'Nyi glaciers)
复制标题
青藏高原南部冰川减薄的直接测量（古仁河口冰川、康吾热冰川和奈莫那尼冰川）
DOI：
10.3189/2014jog14j022
复制
发表时间：
2014-01-01
影响因子：
3.4
通讯作者：
Zhu Dayun
中科院分区：
文献类型：
--
作者：
Tian Lide;Zong Jibiao;Zhu Dayun
大量研究证实，近几十年来青藏高原冰川迅速退缩，导致冰川体积减少。然而，对冰川厚度变化的高分辨率测定仍然很少。本文介绍了基于差分 GPS 测量的结果，以准确测量过去几年冰川厚度的变化。古人河口冰川下部的测量显示，4年期间平均厚度变化为-3.82 m。在康乌热冰川的下部，我们测量到三年内平均厚度变化为-2.70 m。喜马拉雅山西部奈莫纳尼冰川（北支）上部，2008年至2010年厚度平均变化-1.34 m，2010年至2013年平均变化-0.87 m。由于局部降水的变化，奈莫纳尼冰川的减薄率随时间变化较大。我们的测量还显示了每个冰川不同部分的冰川厚度的可变变化，与海拔的关系很小。有限的数据还显示堆积区冰川变薄。
Numerous studies have confirmed the rapid retreat of Tibetan Plateau glaciers in recent decades, and resulting reductions in glacier volume. However, high-resolution determinations of the changes in glacier thickness remain sparse. This paper presents results based on differential GPS measurements to accurately measure glacier thickness change over the past few years. Measurements from the lower part of Gurenhekou glacier show an average thickness change of -3.82 m over a 4 year period. On the lower part of Kangwure glacier we measured an average thickness change of -2.70 m over 3 years. On the upper part of Naimona'Nyi glacier (northern branch), western Himalaya, thickness changed by -1.34 m on average between 2008 and 2010, and -0.87 m between 2010 and 2013. Large temporal changes in thinning rates were found on Naimona'Nyi glacier, due to variations in local precipitation. Our measurements also show variable changes in glacier thickness over different parts of each glacier, with little dependence on elevation. The limited data also show glacier thinning in the accumulation zone.