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Response of glacier area variation to climate change in the Kaidu-Kongque river basin,Southern Tianshan Mountains during the last 20 years

引用

China Geology 2021年第3期4卷 389-401页

作者： Lu-chen Wang Kun Yu Liang Chang Jun Zhang Tao Tang Li-he Yin Xiao-fan Gu Jia-qiu Dong Ying Li Jun Jiang Bing-chao Yang Qian Wang Key Laboratory of Groundwater and Ecology in Arid and Semi-arid Areas China Geological SurveyXi’an 710054China Xi’an center China Geological SurveyXi’an 710054China School of Water Resources and Environment China University of Geosciences(Beijing)Beijing 100083China

Glaciers are crucial water resources for arid inland rivers in Northwest *** recent decades,glaciers are largely experiencing shrinkage under the climate-warming scenario,thereby exerting tremendous influences on regional water *** primary role of understudying watershed scale glacier changes under changing climatic conditions is to ensure sustainable utilization of regional water resources,to prevent and mitigate glacier-related *** study maps the current(2020)distribution of glacier boundaries across the Kaidu-Kongque river basin,south slope of Tianshan Mountains,and monitors the spatial evolution of glaciers over five time periods from 2000-2020 through thresholded band ratios approach,using 25 Landsat images at 30 m *** addition,this study attempts to understand the role of climate characteristics for variable response of glacier *** results show that the total area of glaciers was 398.21 km^(2)in *** glaciers retreated by about 1.17 km^(2)/a(0.26%/a)from 2000 to *** glaciers were reducing at a significantly rapid rate between 2000 and 2005,a slow rate from 2005 to 2015,and an accelerated rate during *** meteorological data shows slight increasing trends of mean annual temperature(0.02℃/a)and annual precipitation(2.07 mm/a).The correlation analysis demonstrates that the role of temperature presents more significant correlation with glacier recession than *** is a temporal hysteresis in the response of glacier change to climate *** trend of temperature in summer proves to be the driving force behind the Kaidu-Kongque basin glacier recession during the recent 20 years.

关键词： Glacier area Climate change Remote sensing monitoring Hydrogeological survey engineering Kaidu-Kongque river basin Tianshan Mountains center asia-mongolian plateau

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