首页|Characterizing the behavior of surge-type glaciers in the Puruogangri Ice Field,Tibetan Plateau
Characterizing the behavior of surge-type glaciers in the Puruogangri Ice Field,Tibetan Plateau
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The Puruogangri Ice Field(PIF),classified as an ultra-continental glacier,is con-sidered extremely stable.However,several glaciers in this area have recently experienced surge events with significant instability and information on surge-type glaciers(STGs)in this region remains scarce.In this study,we identified six STGs and reported the observed characteristics of their surging behavior in the region by mapping glacier boundaries,surface flow velocity information,and glacier surface elevation changes using recent Landsat satellite imagery and shuttle radar topography mission(SRTM),TanDEM,and ASTER digital eleva-tion model(AST14DEM)data.These data provide valuable insights into recent glacial pro-cesses,flow instability,and rapid glacial movement.During the active phase of the glaciers,all exhibited frontal advances and changes in surface elevation.Owing to limitations in the satellite imagery,flow velocity profiles were only available for glaciers N1(G089071E33998N),NE1(G089128E33943N),and SE3(G089278E33913N)during the active phase.However,these results effectively reflect the velocity variations in both glaciers before,during,and after the surge.Based on the characteristics of the STG,scientific expeditions,and meteorological data,we believe that the surge in PIF was largely influenced by glacier meltwater and changes in subglacial drainage systems.
glacier surgeglacier surface elevation changesglacier surface velocityPuruogangri Ice Field
Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity,College of Urban and Environmental Sciences,Northwest University,Xi'an 710127,China
Institute of Earth Surface System and Hazards,College of Urban and Environmental Sciences,Northwest University,Xi'an 710127,China
College of Geography and Environmental Science,Northwest Normal University,Lanzhou 730070,China
Second Tibetan Plateau Scientific Expedition and Research ProgramNational Natural Science Foundation of China
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