Data and code for publication "The role of history and strength of the oceanic forcing in sea level projections from Antarctica with the Parallel Ice Sheet Model"

• Main Authors: Reese, Ronja, Levermann, Anders, Albrecht, Torsten, Seroussi, Hélène, Winkelmann, Ricarda, Mengel, Matthias, other PISM authors
• Format: Other/Unknown Material
• Language: English
• Published: Zenodo 2020
• Subjects: Antarctica; ISMIP6; LARMIP-2; Sea level projections; Antarctic; The Antarctic; Hélène; Pik; Antarc*; Ice Sheet; Ice Shelves
• Online Access: https://doi.org/10.5281/zenodo.3903343

Data and code underlying the publication "The role of history and strength of the oceanic forcing in sea level projections from Antarctica with the Parallel Ice Sheet Model" . Journal: The Cryosphere Authors: Ronja Reese 1* , Anders Levermann 1,2,3 , Torsten Albrecht 1 , Hélène Seroussi 4 , Ricarda Winkelmann 1,2 (1) Potsdam Institute for Climate Impact Research (PIK), Member of the Leibniz Association, P.O. Box 60 12 03, D-14412 Potsdam, Germany (2) Institute of Physics and Astronomy, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany (3) LDEO, Columbia University, New York, USA (4) Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA (*) email [e-mail] Abstract: Mass loss from the Antarctic Ice Sheet constitutes the largest uncertainty in projections of future sea level rise. Ocean-driven melting underneath the floating ice shelves and subsequent acceleration of the inland ice streams is the major reason for currently observed mass loss from Antarctica and is expected to become more important in the future. Here we show that for projections of future mass loss from the Antarctic Ice Sheet, it is essential (1) to better constrain the sensitivity of sub-shelf melt rates to ocean warming and (2) to include the historic trajectory of the ice sheet. In particular, we find that while the ice sheet response in simulations using the Parallel Ice Sheet Model is comparable to the median response of models in three Antarctic Ice Sheet Intercomparison projects – initMIP, LARMIP-2 and ISMIP6 – conducted with a range of ice sheet models, the projected 21st century sea level contribution differs significantly depending on these two factors. For the highest emission scenario RCP8.5, this leads to projected ice loss ranging from 1.4 to 4.0 cm of sea level equivalent in the ISMIP6 simulations where the sub-shelf melt sensitivity is comparably low, opposed to a likely range of 9.2 to 35.9 cm using the exact same initial setup, but emulated from the LARMIP-2 ...