Heterogeneous mass loss of glaciers in the Aksu-Tarim Catchment (Central Tien Shan) revealed by 1976 KH-9 Hexagon and 2009 SPOT-5 stereo imagery
Heterogeneous mass loss of glaciers in the Aksu-Tarim Catchment (Central Tien Shan) revealed by 1976 KH-9 Hexagon and 2009 SPOT-5 stereo imagery
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DOI：
10.1016/j.rse.2012.11.020
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发表时间：
2013-03
影响因子：
13.5
通讯作者：
T. Pieczonka;T. Bolch;Junfeng Wei;Shi-yin Liu
中科院分区：
文献类型：
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作者：
T. Pieczonka;T. Bolch;Junfeng Wei;Shi-yin Liu
铁木尔峰(中天山)以南的阿克苏-塔里木流域的冰川释放的融水流入塔里木河，塔里木河是塔克拉玛干沙漠北缘绿洲的主要动脉。由于缺乏物质平衡数据，对冰川融水对塔里木河总径流贡献的正确建模受到阻碍。多时相数字地形模型(DTM)允许确定大样本冰川的体积变化。本文利用1976年KH-9六边形、2000年SRTM3和2009年SPOT-5数据集给出了12个冰川的质量变化。结果表明，自1976年以来，大多数冰川一直在失去质量。尽管有厚厚的碎屑覆盖，但最大的冰川科克斯卡尔和西琼特朗在1976年至2009年间失去了−0.27±0.15 mW.e.a−1和−0.43±0.15 mW.e.a−1。然而，一些较小的冰川在它们的舌头上显示出质量增加，这表明冰川激增。利用SRTM3资料可以确定秦冰滩74号冰川的体积增量可以追溯到1999-2009年。所调查冰川的−0.33±0.15 mW.e.a−1(1976-2009年)总体质量收支在全球平均值的变化范围内。然而，在最近几年(1999年至2009年)，可以观察到−的质量损失略有减速，即−为0.23±0.19 mW.
The meltwater released by the glaciers in the Aksu-Tarim Catchment, south of Tomur Peak (Central Tien Shan), feeds the Tarim River which is the main artery for the oases at the northern margin of the Taklamakan desert. The correct modeling of the contribution of the glaciers meltwater to the total runoff of the Tarim River is hampered by the lack of mass balance data. Multi-temporal digital terrain models (DTMs) allow the determination of volume changes for large samples of glacier. Here, we present the mass changes for 12 glaciers using 1976 KH-9 Hexagon, 2000 SRTM3 and 2009 SPOT-5 datasets. The results show that most of the glaciers have been losing mass since 1976. The largest glaciers, Koxkar and West Qongterang, lost −0.27±0.15mw.e.a−1and −0.43±0.15mw.e.a−1between 1976 and 2009, despite thick debris cover. However, some smaller glaciers show mass gain at their tongues indicating glacier surges. Using SRTM3 data the volume gain of Qinbingtan Glacier No. 74 could be dated to the time period 1999–2009. The overall mass budget of −0.33±0.15mw.e.a−1(for 1976–2009) of the investigated glaciers is within the variability range of the global average. However, in the recent years (1999–2009) a slightly decelerated mass loss of −0.23±0.19mw.e.a−1could be observed.