Ocean driven retreat of the Northeast Greenland Ice Stream following the Last Glacial Maximum.

ABSTRACT: The Northeast Greenland Ice Stream (NEGIS), the largest ice stream draining the Greenland Ice Sheet (GrIS), is losing mass at an accelerating rate due to atmospheric and ocean-driven melting. Holding the equivalent of 1.1-1.4 metres of sea-level rise, its collapse will have a significant impact on global sea levels making it crucial to understand the controls on its dynamic behaviour. The NEGIS retreated from the continental shelf edge by 21.6 ka BP, with this study confirming continued grounding line retreat to ~100 km from the shelf edge by 20.3 ka BP, earlier than previously reported. This early retreat was driven by warm Return Atlantic Water (RAW) and amplified by a retrograde seabed, which together drove initial grounding line retreat. The presence of a series of grounding zone wedge

SUBMITTER: Callard SL 

PROVIDER: S-EPMC12689639 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature