Geotextile protection of glacier:Observed and simulated impacts on energy and mass balance  

作　　者：Fei-Teng WANG Shuang-Shuang LIU Xing WANG Hui-Lin LI Chun-Hai XU Lin WANG Yu-Ang XUE Xiao-Ying YUE 

机构地区：[1]State Key Laboratory of Cryospheric Science,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China [2]University of Chinese Academy of Sciences,Beijing 100049,China

出　　处：《Advances in Climate Change Research》2023年第6期963-975,共13页气候变化研究进展（英文版）

基　　金：supported by the Gansu Provincial Science and Technology Program (22ZD6FA005);the State Key Laboratory of Cryospheric Science (SKLCS-ZZ-2022);the National Key Research and Development Program of China (2020YFF0304400);the National Natural Science Foundation of China (42001066);the National Natural Science Foundation of China (42001067).

摘　　要：The detailed physical processes involved in slowing glacier ablation by material cover remain poorly understood so far.In the present study,using the snow cover model SNOWPACK,the effect of geotextile cover on the energy and mass balance at the tongue of the Urumqi Glacier No.1(Chinese Tien Shan)was simulated between July 12,2022 and August 31,2022.The mass changes and the energy fluxes with and without material cover were compared.The results indicated that the geotextile covering reduced glacier ablation by approximately 68%compared to the ablation in the uncovered regions.The high solar reflectivity of the geotextile reduced the net short-wave radiation energy available for the melt by 45%.Thermal insulation of the geotextile reduced the sensible heat flux by 15%.In addition,the wet geotextile exerted a cooling effect through long-wave radiation and negative latent heat flux.This cooling effect reduced the energy available for ablation by 20%.Consequently,only 37%of the energy was used for melting compared to that used in the uncovered regions(67%).Sensitivity experiments revealed that the geotextile cover used at a thickness range of 0.045-0.090 m reduced the ice loss by approximately 68%-72%,and a further increase in the thickness of the geotextile cover led to little improvements.A higher temperature and greater wind speed increased glacier ablation,although their effects were small.When the precipitation was set to zero,it led to a significantly increased melt.Overall,the geotextile effectively protected the glacier tongue from rapid melting,and the observed results have provided inspiration for developing an effective and sustainable approach to protect the glaciers using geotextile cover.

关 键 词：Artificial melt reduction SNOWPACK GEOTEXTILE Energy and mass balance Urumqi glacier No.1 Chinese Tien Shan 

分 类 号：P343.6[天文地球—水文科学]