Two glaciers collapse in western Tibet
Two glaciers collapse in western Tibet
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西藏西部两座冰川崩塌
DOI：
10.1017/jog.2016.122
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发表时间：
2017-02
影响因子：
3.4
通讯作者：
Li Zhiguo
中科院分区：
文献类型：
--
作者：
Tian Lide;Yao T;ong;Gao Yang;Thompson Lonnie;Mosley-Thompson Ellen;Muhammad Sher;Zong Jibiao;Wang Cheng;Jin Shengqiang;Li Zhiguo
2016年7月17日上午，一条3公里长的冰川崩塌（图1）。阿鲁冰川（34.03°N, 82.25°E）海拔5250 - 6150米（CN5Z412C011），是一个冰川群，覆盖27平方公里（2015年）。据目击者称，崩塌的冰在4-5分钟内冲过狭窄的冰舌，横扫平缓的冲积扇，到达105公里2的内陆阿鲁科湖（图1）。图2显示了在崩塌前不久拍摄的最新Sentinel-2卫星图像（图2a）和在7月17日崩塌之后拍摄的最新图像（图2b）。分离的冰块（图2b）宽2.4公里，长5.7公里，现在覆盖面积为9.4公里。在高海拔迅速下降的冰通过后，冰川的下部消失了。8月13日，通过差分GPS沿着崩塌冰的边缘进行的调查显示，冰川的深度从冰川鼻部的3米增加到沉积物远端的13米。矿床的平均深度估计为7.5米。这表明下降冰的总量至少为7000万立方米，或相当于冰川平均厚度损失约21米。在过去的几十年里，阿鲁冰川一直相当稳定。陆地卫星图像证实，在过去40年里，冰川面积从3.51公里一直在减少，减少了0.15 km2（4.3%）。高分一号卫星数据显示，阿鲁冰川面积从2015年9月19日的3.35 km2小幅增加到2016年2月1日的3.44 km2，冰川长度以相当于~ 200 m a -1的速度增加了75 m。该地区的冰川不是温带的，而是冷基的，冻结在床上（Shi和Liu， 2000）。最近的研究表明，近几十年来，该地区的冰川退缩比喜马拉雅山的冰川要少（Bolch等人，2012；Yao等人，2012）。例子包括昆仑山西部的冰川（上官等人，2007）、阿鲁冰川以西的副昌达克地区（李等人，2016）……
A 3 km long glacier collapsed in the morning of 17 July 2016 (Fig. 1). The avalanche killed nine herders living in their summer pasture at Aru Village, Dongru Community, Ritu County, Ali District, Xizang Autonomous Region, the most remote region on the western Tibetan Plateau. The Aru Glacier (34.03°N; 82.25°E), ranges in elevation from 5250 to 6150 m a.s.l. (CN5Z412C011) and is one of a glacier group that covers 27 km 2 (in 2015). The collapsed ice rushed down within 4–5 min (according to eyewitnesses) over the narrow tongue and swept across the gently-sloping alluvial fan, reaching the 105 km 2 inland Aruco Lake (Fig. 1). Figure 2 shows the most recent Sentinel-2 satellite image taken shortly before the collapse (Fig. 2a) and the most recent image taken after the 17 July collapse (Fig. 2b). The detached ice mass (Fig. 2b) is 2.4 km wide, 5.7 km long and now covers 9.4 km 2. The lower part of the glacier disappeared after the passage of the rapidly descending ice from higher elevation. A survey by differential GPS along the margin of the collapsed ice on 13 August showed an increasing depth from 3 m at the glacier snout to 13 m at the distal end of the deposit. The average depth of the deposits was estimated to be 7.5 m. This indicates a total volume of fallen ice of at least 70 million m 3 , or equivalent to an average glacier thickness loss of ∼21 m. The Aru Glacier has been rather stable in the past decades. Landsat imagery confirms that the glacier area has been decreasing from 3.51 km which gives a decrease of 0.15 km 2 (4.3%) over the past 4 decades. Gaofen-1 satellite data indicate that the Aru Glacier area increased slightly from 3.35 km 2 on 19 September 2015 to 3.44 km 2 on 1 February 2016 and its length increased 75 m at a rate equivalent to ∼200 m a –1. Glaciers in this region are not temperate but cold-based and frozen to the bed (Shi and Liu, 2000). Recent research reveals that over recent decades the glaciers in this region have experienced less retreat than those in the Himalayas (Bolch and others, 2012; Yao and others, 2012). Examples include glaciers in the western Kunlun Mountains (Shangguan and others, 2007), the Depuchangdake region just west of the Aru Glacier (Li and others, 2016) …
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影响因子：
3.4
作者：
M. Lv;Xiancai Lu;Huadong Guo;Guang Liu;Yixing Ding;Zhixing Ruan;Yuanzhen Ren;Shiyong Yan
通讯作者：
M. Lv;Xiancai Lu;Huadong Guo;Guang Liu;Yixing Ding;Zhixing Ruan;Yuanzhen Ren;Shiyong Yan
影响因子：
3.4
作者：
Faillettaz, Jerome;Sornette, Didier;Funk, Martin
通讯作者：
Funk, Martin
影响因子：
2.9
作者：
Junfeng Wei;Shiyin Liu;Wanqin Guo;Xiaojun Yao;Xu Junli;Wei-jia Bao;Zong-li Jiang
通讯作者：
Junfeng Wei;Shiyin Liu;Wanqin Guo;Xiaojun Yao;Xu Junli;Wei-jia Bao;Zong-li Jiang
DOI：
--
发表时间：
2005
期刊：
--
影响因子：
--
作者：
S. Yunga;A. Lutikov;O. Molchanov
通讯作者：
S. Yunga;A. Lutikov;O. Molchanov
影响因子：
--
作者：
Ya-feng Shi;Shi-yin Liu
通讯作者：
Ya-feng Shi;Shi-yin Liu