摘要
Based on the Chinese Glacier Inventory of Xinjiang in 2020(CGI-XJ2020),we analyzed glacier distribution in theAksu River Basin and examined glacier changes using datasets from Chinese three-period inventories.In 2020,the basin contained 3,491 glaciers,covering 4,144.84 km^(2),and estimated their ice volume at 345.05 km3.Thelargest glacier areas appeared at elevations between 3,800 and 4,100 m(29.70%),and northern-oriented glaciersdominated both in number(33.73%)and area(35.68%).From 1963 to 2007,glacier area decreased by361.22 km^(2),with an annual retreat rate of 0.38%.From 2007 to 2020,the area decreased by 118.88 km^(2),showing a higher retreat rate of 0.51%,indicating accelerated melting.Glaciers shrank rapidly across all ori-entations,with the fastest reductions occurring in the southwest and the slowest in the northwest.The extent ofglacier area change was influenced by glacier area and debris.Debris-covered glaciers were widespread in theAksu River Basin,with larger glaciers showing an increase in debris.Debris reduced the rate of terminus retreatin large glaciers,while glaciers with thinner debris layers experienced more pronounced melting,with large icetongues at lower altitudes shrinking rapidly,while high-altitude regions remained relatively stable.
基金
supported by Third Xinjiang Scientific Expedition Program(Grant No.2022xjkk0101)
Second Qinghai-Tibet Scientific Expedition Program(Grant No.2019QZKK0201)
National Natural Science Foundation of China(Grant No.42301166)
National Science Foundation of Gansu Province(Grant No.23JRRA658)
Xinjiang Key Laboratory of Water Cycle and Utilization in Arid Zone(XJYS0907-2024-yb-11)
