Abstract
The marine-terminating glaciers are one of the biggest contributors to global sea-level rise. Research on this aspect of the effects of global climate change is developing nowadays in several directions. One of them is monitoring of glaciers movements, especially with satellite data. In addition to well-known analyzes based on radar data from available satellites, the possibility of studying glacier displacements from new sensors, the so-called microsatellites need to be studied. The main purpose of research was evaluation of the possibility of applying new high-resolution ICEYE radar data to observe glacier motion. Stripmap High mode were used to obtain velocities for the Jakobshavn glacier with an Offset-Tracking method. Obtained results were compared with displacements obtained from the Sentinel-1 data. The comparative analysis was performed on displacements in range and azimuth directions and for maximum velocity values. Moreover, correlation plots showed that in different parts of glaciers, a comparison of obtained velocities delivers different correlation coefficients (R2) in a range from 0.52 to 0.97. The analysis showed that the scale of movements is similar from both sensors. However, Sentinel-1 data present underestimation of velocities comparing to ICEYE data. The biggest deviations between results were observed around the maximum velocities, near the Kangia Ice Fjord Bay. In the analysis the amplitude information was used as well. This research presents that data from the ICEYE microsatellites can be successfully used for monitoring glacial areas and it allows for more precise observations of displacement velocity field.
Highlights
Accepted: 8 June 2021Observing the ice-sheet all over the world is recently a topic of increasing importance, especially in the face of a constantly warming climate
Comparative research on the movement of the Jakobshavn glacier carried out based research onand theimages movement
Jakobshavn glacier carriedallowed out based on Comparative the offset tracking method from of thethe
Summary
Observing the ice-sheet all over the world is recently a topic of increasing importance, especially in the face of a constantly warming climate. Faster decreasing of ice masses in polar regions leads to sea-level rise [1]. Rapid detachment of the large parts of mountain glaciers causes a direct threat to human safety. Melting of ice cover and glaciers in Greenland is one of the main contributors to global sea-level rise in the world. It is essential to monitor and get to know better this phenomenon. Probably in perspective of few decades, the melting process will intensify [2]
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