Seasonal Patterns of Greenland Ice Velocity From Sentinel-1 SAR Data Linked to Runoff
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Accurate projections of the mass loss from the Greenland Ice Sheet (GrIS) require a complete understanding of the ice-dynamic response to climate forcings on seasonal and interannual timescales and would greatly benefit from more observational evidence. Here, we analyze a 5-year, high-resolution data set of ice velocities of the GrIS using K-means, an unsupervised clustering algorithm, to identify ice-sheet wide characteristic seasonal flow patterns. We include all areas flowing >0.3 m/d and obtain an ice-sheet wide overview of the seasonality and the interannual variability. It shows both a spatial and interannual variability in seasonal flow patterns, both along individual glaciers and between glaciers. We compare with runoff from a regional climate model and infer that the ice-sheet wide patterns are linked to the availability of water penetrating to the base of the ice.
Originalsprog | Engelsk |
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Artikelnummer | e2022GL100343 |
Tidsskrift | Geophysical Research Letters |
Vol/bind | 49 |
Udgave nummer | 24 |
ISSN | 0094-8276 |
DOI | |
Status | Udgivet - 2022 |
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© 2022. The Authors.
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