Zahra Dabiri,
Daniel Hölbling,
Lorena Abad,
Snævarr Guðmundsson
S. 46 - 52
doi:
10.1553/giscience2021_01_s46
Verlag der Österreichischen Akademie der Wissenschaften
doi:
10.1553/giscience2021_01_s46
Abstract:
Monitoring ice-marginal lakes is important for glaciological and geomorphological studies, as well as hazard and risk assessment. Sentinel-1 synthetic aperture radar (SAR) and Sentinel-2 optical data opened a new era for multi-temporal analysis and studying geomorphological changes. The purpose of this study is to compare the applicability of Sentinel-1 and Sentinel-2 data for mapping the changes in ice-marginal lake areas at the southern margin of the Vatnajökull ice cap, southeast Iceland, between 2016 and 2020. We semi-automatically mapped the ice-marginal lakes with object-based image analysis (OBIA) and based on image time series using 1) the polarization products derived from Sentinel-1 data, and 2) the spectral information of Sentinel-2 data, and compared the results. Our results show that Sentinel-1 performed better regarding the detection of the number of ice-marginal lakes, whereas Sentinel-2 performed better regarding lake delineation. Moreover, we discuss the applicability of optical and SAR data for mapping and monitoring the evolution of ice-marginal lakes.
Sentinel-1, Sentinel-2, ice-marginal lake, object-based image analysis, Iceland
Published Online:
2021/06/29 09:35:09
Object Identifier:
0xc1aa5576 0x003c9b50
Rights:https://creativecommons.org/licenses/by-nd/4.0/
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