Fractal-Based Retrieval and Potential Driving Factors of Lake Ice Fractures of Chagan Lake, Northeast China Using Landsat Remote Sensing Images

Remote Sensing

Xuemei Liu¹  Xiaohua Hao²  Qian Yang²  Liwen Chen³  Yue Ma³  Xiaoguang Shi³  Wenfeng Huang⁴ 

[1] Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China;Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China;School of Geomatics and Prospecting Engineering, Jilin Jianzhu University, Changchun 130118, China;School of Water and Environment, Chang’an University, Xi’an 710064, China;

关键词: lake ice fracture;    fractal theory;    lake ice phenology;    field investigation;    hydrodynamic field;   

DOI  :  10.3390/rs13214233

来源: DOAJ

【 摘 要 】

A thorough understanding of the freshwater ice process received considerable critical attention due to increasing winter recreations and ice engineering. The development of the lake ice process of Chagan Lake was monitored using MODIS and Landsat images over eight consecutive snow seasons from October 2013 to April 2021. We derived the lake ice phenology from an eight-day time series of lake water skin temperature (LWST) provided by MODIS, including freeze-up date, break-up date, and ice cover duration. We discovered a large-scale fracture extending from northwest to southeast that repeatedly appeared on Landsat images since 1986. A novel fractal-based auto-extraction is proposed to extract the length and angle of these fractures. We also carried out a field campaign and an ice ridge was found at the southernmost part of what we observed from the images. Moreover, we explained the fracturing development by thermal changes, wind in lake, and underlying flow. Results show that the lake ice fracture is nearly perpendicular to the dominant wind direction in the cold season, which indicates the crucial role of wind on lake ice fracturing.

【 授权许可】

Unknown