Print Email Facebook Twitter Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream Title Interplay of grounding-line dynamics and sub-shelf melting during retreat of the Bjørnøyrenna Ice Stream Author Petrini, M. (TU Delft Physical and Space Geodesy; Istituto Nazionale di Oceanografia e Geofisica Sperimentale) Colleoni, Florence (Fondazione Centro Euro-Mediterraneo sui Cambiamenti Climatici) Kirchner, Nina (Stockholm University) Hughes, Anna L.C. (University of Bergen and Bjerknes Centre for Climate Research) Camerlenghi, Angelo (Istituto Nazionale di Oceanografia e Geofisica Sperimentale) Rebesco, Michele (Istituto Nazionale di Oceanografia e Geofisica Sperimentale) Lucchi, Renata G. (Istituto Nazionale di Oceanografia e Geofisica Sperimentale) Forte, Emanuele (University of Trieste) Colucci, Renato R. (Istituto di Scienze Marine) Noormets, Riko (The University Centre in Svalbard) Date 2018-12-01 Abstract The Barents Sea Ice Sheet was a marine-based ice sheet, i.e., it rested on the Barents Sea floor during the Last Glacial Maximum (21 ky BP). The Bjørnøyrenna Ice Stream was the largest ice stream draining the Barents Sea Ice Sheet and is regarded as an analogue for contemporary ice streams in West Antarctica. Here, the retreat of the Bjørnøyrenna Ice Stream is simulated by means of two numerical ice sheet models and results assessed against geological data. We investigate the sensitivity of the ice stream to changes in ocean temperature and the impact of grounding-line physics on ice stream retreat. Our results suggest that the role played by sub-shelf melting depends on how the grounding-line physics is represented in the models. When an analytic constraint on the ice flux across the grounding line is applied, the retreat of Bjørnøyrenna Ice Stream is primarily driven by internal ice dynamics rather than by oceanic forcing. This suggests that implementations of grounding-line physics need to be carefully assessed when evaluating and predicting the response of contemporary marine-based ice sheets and individual ice streams to ongoing and future ocean warming. To reference this document use: http://resolver.tudelft.nl/uuid:db2caeb4-8087-41cc-9e43-703e9b75f0df DOI https://doi.org/10.1038/s41598-018-25664-6 ISSN 2045-2322 Source Scientific Reports, 8 (1) Part of collection Institutional Repository Document type journal article Rights © 2018 M. Petrini, Florence Colleoni, Nina Kirchner, Anna L.C. Hughes, Angelo Camerlenghi, Michele Rebesco, Renata G. Lucchi, Emanuele Forte, Renato R. Colucci, Riko Noormets Files PDF s41598_018_25664_6.pd.pdf 3 MB Close viewer /islandora/object/uuid:db2caeb4-8087-41cc-9e43-703e9b75f0df/datastream/OBJ/view