气候变化领域集成服务门户(CCPortal): Inventory of Glacial Lake in the Southeastern Qinghai-Tibet Plateau Derived from Sentinel-1 SAR Image and Sentinel-2 MSI Image

CCPortal

DOI	10.3390/rs15215142
	Inventory of Glacial Lake in the Southeastern Qinghai-Tibet Plateau Derived from Sentinel-1 SAR Image and Sentinel-2 MSI Image
	Zhang, Yuan; Zhao, Jun; Yao, Xiaojun; Duan, Hongyu; Yang, Jianxia; Pang, Wenlong
发表日期	2023
EISSN	2072-4292
卷号	15 期号:21
英文摘要	The glacial lakes in the Southeastern Qinghai-Tibet Plateau (SEQTP) have undergone dramatic expansion in the context of global warming, leading to several glacial lake outburst floods (GLOFs) disasters. However, there is a gap and incompleteness in glacial lake inventories across this area due to the heavy cloud cover. In this study, an updated and comprehensive glacial lake inventory was produced by object-based image analysis (OBIA) and manual vectorization based on the Sentinel-1 SAR and Sentinel-2 MSI images acquired in 2022. Detailed steps regarding the OBIA were provided, and the feature set of Sentinel-1 SAR images suitable for extracting glacial lakes was also determined in this paper. We found that the mean combination of ascending-orbit and descending-orbit images is appropriate for mapping glacial lakes. VV-polarized backscattering coefficients from ascending-orbit achieved a better performance for delineating glacial lakes within the study area. Moreover, the distribution of glacial lakes was characterized in terms of four aspects: size, type, elevation, and space. There were 3731 glacial lakes with a total area of 1664.22 +/- 0.06 km2 in the study area; most of them were less than 0.07 km2. Ice-contacted lakes were primarily located in the Palongzangbo basin (13.24 +/- 0.08 km2). Nyang Qu basin had the most abundant glacial lake resources (2456 and 93.32 +/- 0.18 km2). A comparison with previously published glacial lake datasets demonstrated that our dataset is more complete. This inventory is useful for evaluating water resources, studying glacier-glacial lake interactions, and assessing GLOFs' susceptibility in the SEQTP.
关键词	glacial lake inventory Sentinel-1 SAR image Sentinel-2 MSI image object-based image analysis manual vectorization Southeastern Qinghai-Tibet Plateau
英文关键词	HIGH-MOUNTAIN ASIA; LANDSAT; BASIN; SEGMENTATION; EVOLUTION; CORRIDOR; DATASET; VOLUME; CHINA
WOS研究方向	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS记录号	WOS:001099561800001
来源期刊	REMOTE SENSING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283004
作者单位	Northwest Normal University - China; China Geological Survey
推荐引用方式 GB/T 7714	Zhang, Yuan,Zhao, Jun,Yao, Xiaojun,et al. Inventory of Glacial Lake in the Southeastern Qinghai-Tibet Plateau Derived from Sentinel-1 SAR Image and Sentinel-2 MSI Image[J],2023,15(21).
APA	Zhang, Yuan,Zhao, Jun,Yao, Xiaojun,Duan, Hongyu,Yang, Jianxia,&Pang, Wenlong.(2023).Inventory of Glacial Lake in the Southeastern Qinghai-Tibet Plateau Derived from Sentinel-1 SAR Image and Sentinel-2 MSI Image.REMOTE SENSING,15(21).
MLA	Zhang, Yuan,et al."Inventory of Glacial Lake in the Southeastern Qinghai-Tibet Plateau Derived from Sentinel-1 SAR Image and Sentinel-2 MSI Image".REMOTE SENSING 15.21(2023).