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Quantifying glacial elevation changes in the central Qilian Mountains during the early 21^(st) century

Journal of Mountain Science 2021年第11期18卷 2946-2959页

作者： ZHANG Qi-bing MO Cao-hu ZHAO Di JIANG Zong-li CHEN Zhe-fu WU Kun-peng ZHANG Zhen College of Geography and Tourism Hunan University of Arts and ScienceChangde 415000China Hunan Province Key Laboratory of Coal Resources Clean-Utilization and Mine Environment Protection Hunan University of Science and TechnologyXiangtan 411201China Institute of International Rivers and Eco-Security Yunnan UniversityKunming 650091China School of Geomatics Anhui University of Science and TechnologyHuainan 232001China

Glaciers in the central Qilian Mountains provide important water resources for the arid Hexi corridor and Qaidam Basin;however,changes in these glaciers interact with climate ***-four bi-static image pairs of TerraSAR-X add-on for Digital elevation Measurement(TanDEM-X)data,in addition to a Shuttle Radar Topography Mission-C/X band digital elevation model,and the technology of iterative differential synthetic aperture radar interferometry were used to carry out glacier elevation change analysis in the central Qilian Mountains in China during 2000–*** elevation changed with an average rate of(−0.47±0.06)m yr^(−1),while changes in elevation of(−0.51±0.06)m yr^(−1) and(−0.44±0.06)m yr^(−1) were found in the northern(including the Zoulangnan,Tuolai,and Tuolainan mountains)and southern(including the Shulenan and Hark mountains)regions,*** mean temperature has risen by 0.51℃(10 yr)^(−1)in the northern region and 0.48℃(10 yr)^(−1) in the southern region during 1989–2014;however,the change in amplitude of annual precipitation was 2.69 mm yr^(−1) in the northern region and 4.77 mm yr^(−1) in the southern region for the same *** changes can be ascribed as major driving factors for the differences in the changes in glacial elevation in the northern and southern *** types of glaciers existed in the region when considering the change in elevation of the glacial tongue and variation in the position of the glacial terminus:surging,advancing,intensively retreating,and slightly retreating *** elevation decreased more than 20 m on the part of glacier tongue,the glacier terminus position had commonly retreated more than 100 m.

关键词： Central Qilian Mountains glacial elevation change Climate change TanDEM-X data Iterative differential synthetic aperture radar interferometry

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