Analysis of spatio-temporal changes and driving factors of glaciers in the Qilian Mountains of Gansu province

doi:10.13474/j.cnki.11-2246.2025.1026

Abstract

Abstract: Aiming at the problem that the existing research on the changes and influencing factors of glaciers in the Qilian Mountains of Gansu province is insufficient, this paper uses the high-resolution remote sensing images in 2013, 2019 and 2023 to monitor glacier changes based on the second glacier inventory data, and uses the geographic detector to analyze driving factors.The results indicate:①From 2006 to 2023, the number of glaciers increased by 301, the area decreased by 105.07 km².The average annual retreat rate was 0.83 %, and it continued to accelerate.②In the area with small scale, low altitude and steep terrain, the glacier retreats quickly, and the southwestward glacier retreats the fastest, reaching 21.45%.③The increase of temperature changes the thermal balance, which is the key factor for glacier retreat.Slope affects glacier movement and solar radiation promotes ablation, which is the main driving factor.In addition, pollutants such as PM₁₀ produced by increased human activities in recent years have changed the physical properties of glacier surface and enhanced the ablation process.In order to slow down the glacier retreat, it is recommended to control the discharge of cooling, reduce human pollution emissions, and strengthen the protection of glaciers in complex terrain areas.

Key words: Qilian Mountains, glacier, spatio-temporal changes, driving factors, geographic detector

CLC Number:

P208

JING Hongxia, LIU Yushuo, LI Xia, CAI Xiqin, HU Xiaojuan. Analysis of spatio-temporal changes and driving factors of glaciers in the Qilian Mountains of Gansu province[J]. Bulletin of Surveying and Mapping, 2025, 0(10): 157-162.

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