Abstract
Abstract. The study of glacier surges is meaningful for the understanding of glacier dynamics and the mechanisms of surge-type glaciers. Here, we briefly introduce the distribution of surge-type glaciers and the reason of their tendency to cluster within particular regions. Then we make a review of optical and SAR remote sensing methods for the spaceborne measurement of the surface velocity about surge-type glaciers and show the details of characteristics of Surging Glaciers including the acceleration and deceleration of the velocity of the glacier surface, the terminus may move forward a few kilometers in just a few months, then we give a specific example of surge-type glacier, Sortebræ. Finally, we summarize the existing mechanism of the glaciers surging.
Highlights
Glacier surging is a phenomenon that the speed of glacier movement alternates between slow and fast and regularly
Phase-based methods include differential interferometric SAR (DInSAR) and Multiple-Aperture Interferometry (MAI) while offset-based methods can be categorized into speckle, co-herence and intensity tracking (Dirscherl, 2020)
We briefly introduce the characteristics of surface velocity and elevation changes during the surging period, and summarize the mechanism of the glaciers surging
Summary
Glacier surging is a phenomenon that the speed of glacier movement alternates between slow and fast and regularly. The surface velocity of the entire glacier is in a very low state At this stage, the upper reservoir area of the glacier is supplied with ice mass due to factors such as precipitation and snowfall. Phase-based methods include differential interferometric SAR (DInSAR) and Multiple-Aperture Interferometry (MAI) while offset-based methods can be categorized into speckle, co-herence and intensity tracking (Dirscherl, 2020) Another aspect is the elevation decrease in the upper reservoir area of the glacier and the increase of the terminal part of the glacier during the surging periods. We briefly introduce the characteristics of surface velocity and elevation changes during the surging period, and summarize the mechanism of the glaciers surging
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