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Long-term glacier variations and the response to climate fluctuation in Qilian Mountains,China

Journal of Geographical Sciences 2024年第10期34卷 1904-1924页

作者： WANG Sheng WANG Jianwen ZHU Meilin YAO Tandong PU Jianchen WANG Jinfeng College of Geography Science Shanxi Normal UniversityTaiyuan 030000China Center for the Pan-Third Pole Environment Lanzhou UniversityLanzhou 730000China Key Laboratory of Tibetan Environment Changes and Land Surface Processes Institute of Tibetan Plateau ResearchCASBeijing 100101China State Key Laboratory of Cryospheric Sciences Northwest Institute of Eco-environment and ResourcesCASLanzhou 730000China

Glaciers are considered to be‘climate-sensitive indicators'and‘solid reservoirs',and their changes significantly impact regional water *** mass balance(MB)from 2011 to 2020 of the Qiyi Glacier in the northeast Tibetan Plateau is presented based on field *** glacier showed a persistent negative balance over 9 years of in-situ observations,with a mean MB of-0.51 m ***^(-1).The distributed energy-mass balance model was used for glacier MB reconstruction from 1980 to *** daily meteorological data used in the model were from HAR v2 reanalysis data,with automatic weather stations located in the middle and upper parts of the glacier used for deviation *** average MB over the past 40 years of the Qiyi Glacier was -0.36 m ***^(-1)with the mass losses since the beginning of the 21st century,being greater than those in the *** glacier runoff shows a significant increasing trend,contributing~81% of the downstream river *** albedo disparity indicates that the net shortwave radiation is much higher in the ablation zone than in the accumulation zone,accelerating ablation-area expansion and glacier mass *** MB of the Qiyi Glacier is more sensitive to temperature and incoming shortwave radiation variation than *** MB presented a non-linear reaction to the temperature and incoming shortwave *** future climate warming,the Qiyi Glacier will be increasingly likely to deviate from the equilibrium state,thereby exacerbating regional water balance *** is found that the mass losses of eastern glaciers are higher than those of western glaciers,indicating significant spatial heterogeneity that may be attributable to the lower altitude and smaller area distribution of the eastern glaciers.

关键词： glacier mass balance energy-mass balance model hydrology Qilian Mountains

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