Tracking glacier surge evolution using interferometric SAR coherence — examples from Svalbard

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Authors

Erik Schytt Mannerfelt , Thomas Schellenberger, Andreas Kääb

Abstract

We present a practically simple methodology for tracking glacier surge
onset and evolution using interferometric Synthetic Aperture Radar
(InSAR) coherence. Detecting surges early and monitoring their build-up
is interesting for a multitude of scientific and safety-related aspects. We
show that InSAR coherence maps allow the detection of surge-related
instability on Svalbard many years before being detectable by, for
instance, feature tracking or crevasse detection. Furthermore, we present
derived data for two types of surges; downstream- and upstream-
propagating, with interestingly consistent surge propagation and post-
surge relaxation rates. The method works well on Svalbard glaciers, and
the data and core principle suggest a global applicability.

DOI

https://doi.org/10.31223/X5699S

Subjects

Earth Sciences, Glaciology, Physical Sciences and Mathematics

Keywords

glacier surge, remote sensing, InSAR, Svalbard

Dates

Published: 2024-10-14 15:29

Last Updated: 2024-10-14 22:29

License

CC-By Attribution-NonCommercial-NoDerivatives 4.0 International