Variations of Laohugou Glacier No.12 in the western Qilian Mountains, China, from 1957 to 2015  

作　　者：LIU Yu-shuo QIN Xiang CHEN Ji-zu LI Zhen-lin WANG Jing DU Wen-tao GUO Wan-qin 

机构地区：[1]State Key Laboratory of Cryospheric Science, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences [2]Qilian Shan Station of Glaciology and Ecologic Environment, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences [3]Geomatics Center of Gansu Province,Gansu Bureau of Surveying, Mapping and Geoinformation

出　　处：《Journal of Mountain Science》2018年第1期25-32,共8页山地科学学报（英文）

基　　金：supported by the National Foundational Scientific and Technological Work Programs of the Ministry of Science and Technology of China (grant No. 2013FY111400);the Project from the State Key Laboratory of Cryospheric Sciences (grant No. SKLCS-ZZ-2017);the National Key Geographic Conditions Monitoring: The Project of Basic National Geographical Conditions Monitoring in 2015

摘　　要：Glaciers were solid reservoirs and important water resources in western China,but they were retreating significantly in context of global warming.Laohugou Glacier No.12 was the largest valley glacier in Qilian Mountains.In this study,realtime kinematic(RTK)data,topographic map and World View-2 satellite imagery were used to measure changes in terminus,extent and volume of Laohugou Glacier No.12.Results showed that Laohugou Glacier No.12 was shrinking significantly since 1957.From1960 to 2015,the terminus reduction of Laohugou Glacier No.12 was 402.96 m(3.99%)in total,and glacier length decreased to 9.7 km from 10.1 km.Reduction of glacier area and volume were the most obvious.From 1957 to 2015,glacier area and volume decreased by 1.54 km^2(7.03%)and 0.1816 km^3,respectively.Reduction trend of terminus and area was slowing in 1950-1980s,even stable for a period in the mid-1980s,and then accelerated.Ice core analysis result and nearly meteorological station data shown an increasing trend of temperature in 1957-2015,it was a main reason of continuous retreating of Laohugou Glacier No.12.

关 键 词：Glacier changes Laohugou Glacier No.12 Qilian Mountains Real-time kinematic Remote sensing image 

分 类 号：P343.6[天文地球—水文科学] TV213.4[天文地球—地球物理学]