The content of this article comes from the "Surveying and Mapping Bulletin" No. 3 of 2024, drawing review number: GS Jing (2024) No. 0499
A study of the ice surface lake of the Bartolo Glacier based on Sentinel-2 imagery
Xiao Liu, Yongling Sun, Shijin Sun, Min Li
School of Architectural Engineering and Spatial Information, Shandong University of Technology, Zibo 255000, China
Funds: National Natural Science Foundation of China (41904008); "Youth Entrepreneurship Team Program" of Shandong Provincial Colleges and Universities(2022KJ224)
Keywords: Bartolo Glacier, Ice lake, Sentinel-2 image, Random forest algorithm
Citation format: LIU Xiao, SUN Yongling, SUN Shijin, et al. Study on the ice surface lake of Bartolo Glacier based on Sentinel-2 images[J]. Bulletin of Surveying and Mapping, 2024(3): 49-53,80.doi: 10.13474/j.cnki.11-2246.2024.0309
Abstract:Ice lakes are an important part of glaciers and indicators of glacier melting, which not only responds quickly to global climate change, but also has great significance for understanding and mastering regional water resources information. Based on Sentinel-2 remote sensing data, this paper uses random forest algorithm to identify and extract the ice surface lakes of Bartolo Glacier, and analyzes the spatial distribution characteristics of ice lakes in the study area, as well as the relationship between the area and number of ice lakes and glacier elevation based on the extraction results. In this paper, the accuracy rate of ice lake extraction was 96.07%, the completeness rate was 92.18%, and the error rate of [JP+1] was 11.59%. A total of 567 ice lakes were identified in Bartolo Glacier, with an area of 249.46~37134m2. The ice lakes are mostly distributed at 3~26km away from the end of the glacier, and the number of ice lakes between 3800~4300m above sea level is the largest, with an average area of 1922m2. With the increase of elevation, the number and area of ice lakes gradually decreased, and the number of ice lakes above 5300m was only 15, with an average area of 356m2. The decrease in ice surface temperature due to the increase in elevation is the main reason for the sharp decline in the number and area of ice lakes.
About author:LIU Xiao (1995—), male, master's degree, mainly engaged in the research of glacier change. E-mail:[email protected] Corresponding author: Sun Yongling, E-mail: [email protected]
First instance: Yang Ruifang review: Song Qifan
Final Judge: Jin Jun
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