Decline of Geladandong Glacier Elevation in Yangtze River's Source Region: Detection by ICESat and Assessment by Hydroclimatic Data
Decline of Geladandong Glacier Elevation in Yangtze River's Source Region: Detection by ICESat and Assessment by Hydroclimatic Data
复制标题
长江源区各拉丹冬冰川海拔下降：ICESat探测与水文气候资料评估
DOI：
10.3390/rs9010075
复制
发表时间：
2017-01
期刊：
影响因子：
5
通讯作者：
Cheng Yung-Sheng
中科院分区：
文献类型：
--
作者：
Chao Nengfang;Wang Zhengtao;Hwang Cheinway;Jin Taoyong;Cheng Yung-Sheng
多项研究表明，青藏高原冰川正在变薄，导致长江、黄河、澜沧江、印度河、恒河、雅鲁藏布江等中国主要河流以及南亚的供水量减少。长江上游的三条河流均发源于西藏中部各拉丹冬雪山群周围的冰川。在这里，我们利用冰、云和陆地高程卫星 (ICESat) 的高程观测以及航天飞机雷达地面任务 (SRTM) 3 角秒数字高程模型 (DEM) 的参考高程，并辅以 Landsat-7 图像，检测各拉丹东西部 (A)、中部 (B) 和东部 (C) 地区的冰川高程变化。稳健拟合用于确定具有密集 ICESat 数据的地区的冰川海拔变化率，而采用一种称为速率平均的新方法来查找数据密度较低的地区的冰川海拔变化率。整个各拉丹洞2003-2009年的高程变化率为-0.158±0.066 m·a−1，C区2003-2008年的高程变化率为-0.176±0.102 m·a−1（通过稳健拟合）。 A、B 和 C 区的比率分别为 -0.418 ± 0.322 m·a-1 (2000-2009)、-0.432 ± 0.020 m·a-1 (2000-2003) 和 -0.321 ± 0.139 m·a-1 (2000-2008)（按比率平均）。我们使用原位水文气候数据集来评估这些负率：根据沱沱河站、五道梁站和安多站1979-2009年、1957-2013年和1966-2013年的温度记录，冰川变薄是由于各拉丹东周围的温度上升造成的。各拉丹冬冰川变薄导致沱沱河和楚姆达河流测站在 1956 年至 2012 年期间记录的流量增加。各拉丹冬冰川持续融化将减少其对长江流域的长期供水，造成不可逆转的社会经济后果，并严重破坏长江流域的生态系统。
Several studies have indicated that glaciers in the Qinghai-Tibet plateau are thinning, resulting in reduced water supplies to major rivers such as the Yangtze, Yellow, Lancang, Indus, Ganges, Brahmaputra in China, and south Asia. Three rivers in the upstream of Yangtze River originate from glaciers around the Geladandong snow mountain group in central Tibet. Here we used elevation observations from Ice, Cloud, and land Elevation Satellite (ICESat) and reference elevations from a 3-arc-second digital elevation model (DEM) of Shuttle Radar Terrestrial Mission (SRTM), assisted with Landsat-7 images, to detect glacier elevation changes in the western (A), central (B), and eastern (C) regions of Geladandong. Robust fitting was used to determine rates of glacier elevation changes in regions with dense ICESat data, whereas a new method called rate averaging was employed to find rates in regions of low data density. The rate of elevation change was −0.158 ± 0.066 m·a−1 over 2003–2009 in the entire Geladandong and it was −0.176 ± 0.102 m·a−1 over 2003–2008 in Region C (by robust fitting). The rates in Regions A, B, and C were −0.418 ± 0.322 m·a−1 (2000–2009), −0.432 ± 0.020 m·a−1 (2000–2003), and −0.321 ± 0.139 m·a−1 (2000–2008) (by rate averaging). We used in situ hydroclimatic dataset to assess these negative rates: the glacier thinning was caused by temperature rises around Geladandong, based on the temperature records over 1979–2009, 1957–2013, and 1966–2013 at stations Tuotuohe, Wudaoliang, and Anduo. The thinning Geladandong glaciers led to increased discharges recorded at the river gauge stations Tuotuohe and Chumda over 1956–2012. An unabated Geladandong glacier melting will reduce its long-term water supply to the Yangtze River Basin, causing irreversible socioeconomic consequences and seriously degrading the ecological system of the Yangtze River Basin.
登录
查看更多内容
影响因子：
5.3
作者：
K. Matsuo;K. Heki
通讯作者：
K. Matsuo;K. Heki
DOI：
--
发表时间：
2003
期刊：
Journal of Natural Resources
影响因子：
--
作者：
Che Ren-sheng
通讯作者：
Che Ren-sheng
影响因子：
13.5
作者：
Moholdt, Geir;Nuth, Christopher;Kohler, Jack
通讯作者：
Kohler, Jack
影响因子：
3.4
作者：
Guo, Wanqin;Liu, Shiyin;Jiang, Zongli
通讯作者：
Jiang, Zongli
DOI：
10.1007/978-94-007-5784-4_130
发表时间：
2014
期刊：
--
影响因子：
--
作者：
R. Hock
通讯作者：
R. Hock