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Multi-decadal variations in glacier flow velocity and the influencing factors of Urumqi Glacier No.1 in Tianshan Mountains, Northwest China

ISSN号：1001-8360
期刊名称：《铁道学报》
时间：0
分类：P343.6[天文地球—水文科学;天文地球—地球物理学]
作者机构：State Key Laboratory of Cryosphere Science/Tianshan Glaciological Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, College of Geography and Environment Science, Northwest Normal University
相关基金：funded the National Natural Science Foundation of China (41501010, 41401611);the Funds for Creative Research Groups of China (41121001);the Youth Innovation Promotion Association of Chinese Academy of Sciences

作者： WANG Puyu, LI Zhongqin, XU Chunhai, XING Wucheng, ZHOU Ping, ZHANG Hui

关键词：冰河流动速度, 冰河变化, 路径系数分析, Urumqi, 冰河号码, 1, 中国, Tianshan, 山, glacier flow velocity, glacier change, path coefficient analysis, Urumqi Glacier No. 1, Chinese Tianshan Mountains

中文摘要：

Urumqi Glacier No. 1 is a representative glacier in the inland areas of Central Asia and is the only Chinese reference glacier in the World Glacier Monitoring Service. In this study, we explored multi-decadal variations in the flow velocity of the glacier and the influencing factors based on continuous field observations and path coefficient analysis. Results show that the glacier flow velocity decreased from 5.5 m/a in 1980/1981 to 3.3 m/a in 2010/2011. The annual variation in the direction of glacier flow velocity in the western branch and eastern branch was less than 1°–3°, and the change of glacier flow velocity in the western branch was more dramatic than that in the eastern branch. Glacier flow velocity was influenced by glacier morphology(including glacier area, glacier length, and ice thickness), glacier mass balance and local climate conditions(air temperature and precipitation), the glacier morphology being the leading factor. The long-term flow velocity data set of Urumqi Glacier No. 1 contributes to a better understanding of glacier dynamics within the context of climatic warming.

英文摘要：

Urumqi Glacier No. 1 is a representative glacier in the inland areas of Central Asia and is the only Chinese reference glacier in the World Glacier Monitoring Service. In this study, we explored multi-decadal variations in the flow velocity of the glacier and the influencing factors based on continuous field observations and path coefficient analysis. Results show that the glacier flow velocity decreased from 5.5 m/a in 1980/1981 to 3.3 m/a in 2010/2011. The annual variation in the direction of glacier flow velocity in the western branch and eastern branch was less than 1°-3°, and the change of glacier flow velocity in the western branch was more dramatic than that in the eastern branch. Glacier flow velocity was influenced by glacier morphology (including glacier area, glacier length, and ice thickness), glacier mass balance and local climate conditions (air temperature and precipitation), the glacier morphology being the leading factor. The long-term flow velocity data set of Urumqi Glacier No. 1 contributes to a better understanding of glacier dynamics within the context of climatic warming.