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《Journal of Glaciology and Geocryology》 2018-02
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Recent surface elevation changes of three representative glaciers in nyêmaqên Mountains,source region of Yellow River

JIANG Zongli;LIU Shiyin;GUO Wanqin;LI Jing;LONG Sichun;WANG Xin;WEI Junfeng;ZHANG Zhen;WU Kunpeng;Hunan Province Key Laboratory of Coal Resources Clean-Utilization and Mine Environment Protection,Hunan University of Science and Technology;Institute of International Rivers and Eco-Security,Yunnan University;State Key Laboratory of Cryospheric Sciences,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences;  
nyêmaqên Mountains is located in the eastern part of the Tibetan Plateau,where there are many glaciers. The glacier change has an important significant in glacier response to climate change and for glacier meltwater resource accessment. In this article,interferometry of Terra SAR-X/TanDEM-X with bistatic mode was employed to retrieve high resolution and high precision Digital Elevation Models(DEM). Elevation changes of three representative glaciers between 2000 to 2013 were calculated by differential methods with SRTM DEM covered. It was found that surface elevation of the three glaciers has decreased as a whole in recent 13 years. In the Weigele Dangxiong Glacier,the surface elevation has decreased(4. 16 ± 3. 70) m in average,mostly near the terminus; the debris covered area has expanded; the surface elevation has increased in the middle part of the glacier tongue. In the Halong Glacier,surface elevation has decreased(8. 73 ± 3. 70) m in average from terminus to accumulation zone. In the Yehelong Glacier,surface elevation has decreased(13. 0 ± 3. 70) m in average. However,from terminus up to 1. 6 km,the surface elevation has increased 25. 0 m in average,then has decreased clearly in average up to 1. 6 km along the main flowline. Comparison between glacier outline of Chinese Glacier Second Inventory and Lansat 7/8 image found that terminus of the Yehelong Glacier had advanced about500 m,indicating a fast advance or surge between 2000 and 2009. Thus,the conclusion can be drawn that the glaciers in nyêmaqên Mountains had retreated as a whole from 2000 through 2013 with some advances.
【Fund】: 科技部专项项目(2013FY111400);; 国家自然科学基金项目(41471067;41201068;41474014;41271091)资助
【CateGory Index】: P343.6
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