Greenland ice stream dynamics: Short-lived and agile? ...

• Main Authors: Eisen, Olaf, radar consortium, EastGRIP
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: GFZ German Research Centre for Geosciences 2023
• Subjects: Greenland; Ice Sheet
• Online Access: https://dx.doi.org/10.57757/iugg23-0205; https://gfzpublic.gfz-potsdam.de/pubman/item/item_5016260

<!--!introduction!--> Reliable knowledge of ice discharge dynamics for the Greenland ice sheet via its ice streams is essential if we are to understand its stability under future climate scenarios as well as their dynamics in the past. Currently, active ice streams in Greenland have been well mapped using remote-sensing data while past ice-stream paths in what are now deglaciated regions can be reconstructed from the landforms they left behind. However, little is known about possible former and now defunct ice streams in areas still covered by ice. Here, we use radio-echo sounding data to decipher the regional ice-flow history of the northeastern Greenland ice sheet on the basis of its internal stratigraphy. Based on the same data set we also establish age-depth distributions in the ice stream and determine the physical properties of the ice, notably the distribution of anisotropy. By creating a three-dimensional reconstruction of time-equivalent horizons, we map folds deep below the surface that we ... : The 28th IUGG General Assembly (IUGG2023) (Berlin 2023) ...