昆仑山冰湖分布时空特征及驱动力

Subjects: Geosciences >> Hydrology submitted time 2023-08-25 Cooperative journals: 《干旱区研究》

孟乘枫1 仲涛1 郑江华1,2 王南1 刘泽轩1 任祥源3

Abstract： Investigating the variable features of Kunlun glacier lakes is crucial for the development of the localecological environment. The area and number of glacial lakes in the Kunlun Mountains have changed over thepast 20 years, and this paper used supervised classification based on the Google Earth Engine remote sensingcloud platform to study the changes. It also examined the driving factors of temperature, precipitation, and glacierarea. The findings indicate: (1) There were 39.25% more glacial lakes in the Kunlun Mountains in 2020 thanthere were in 2000, and the area expanded by 81.35%, with a distribution pattern of more lakes in the west andfewer lakes in the east. (2) The Kunlun Mountain glacial lakes are primarily found at an altitude of 4600-5600 m,and the number and area of glacial lakes account for 71.58% and 70.51% of the total, respectively. These glaciallakes have a smaller area than 0.1 km2 and are more sensitive to climate change. (3) The temperature and precipitationin the Kunlun Mountains declined by 3.45%, 6.27%, and 21.15% from 2000 to 2020, respectively, as didthe glacier area. The primary cause of the expansion of glacial lakes is the meltwater produced by glacier melting.The study’s findings may provide empirical justification for the preservation and use of water resources as wellas for catastrophe warnings in dry regions.

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