edu.ucar.opensky::articles:42253 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T18:04:38.346590 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d7jq159t https://doi.org/10.22033/ESGF/CMIP6.11301 https Related Dataset #1 NCAR CESM2-FV2 model output prepared for CMIP6 CMIP piControl https://doi.org/10.5065/1K5C-SG05 https Related Dataset #2 CESM2 Last Interglacial at 127ka control https://doi.org/10.5065/PXM0-MC93 https Related Dataset #3 CESM2 lig127ka FW simulations https://doi.org/10.5065/D67H1H0V https Related Software #1 Community Earth System Model - CESM2.0 Antarctic climate response in Last Interglacial simulations using the Community Earth System Model (CESM2) 2024-10-24T00:00:00Z publication https://n2t.net/ark:/85065/d7jq159t https://doi.org/10.5194/cp-20-2349-2024 Berdahl, M. author Leguy, Gunter author Lipscomb, William author Otto-Bliesner, Bette author Brady, Esther C. author Tomas, Robert A. author Urban, N. M. author I. Miller author Morgan, H. author Steig, E. J. author UCAR/NCAR - Library publisher We examine results from two transient modeling experiments that simulate the Last Interglacial period&nbsp;(LIG) using the state-of-the-art Community Earth System Model&nbsp;(CESM2), with a focus on climate and ocean changes relevant to the possible collapse of the Antarctic ice sheet. The experiments simulate the early millennia of the LIG warm period using orbital forcing, greenhouse gas concentrations, and vegetation appropriate for 127 ka. In the first case (127ka), no other changes are made; in the second case (127kaFW), we include a 0.2 Sv freshwater forcing in the North Atlantic. Both are compared with a pre-industrial control simulation (piControl). In the 127ka simulation, the global average temperature is only marginally warmer (0.004 °C) than in the piControl. When freshwater forcing is added (127kaFW), there is surface cooling in the&nbsp;Northern Hemisphere (NH) and warming in the&nbsp;Southern Hemisphere (SH), consistent with the bipolar seesaw effect. Near the Antarctic ice sheet, the 127ka simulation generates notable ocean warming (up to 0.4 °C) at depths below 200 m compared to the piControl. In contrast, the addition of freshwater in the North Atlantic in the 127kaFW run results in a multi-century subsurface ocean cooling that rebounds slowly over multiple millennia near the Antarctic ice sheet. These results have implications for the thermal forcing (and thereby mass balance) of the Antarctic ice sheet. We explore the physical processes that lead to this result and discuss implications for climate forcing of Antarctic ice sheet mass loss during the&nbsp;LIG. UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact PDF Text theme Resource Type 2016-01-01T00:00:00Z publication <style type="text/css"></style><span style="font-family:Arial;font-size:10pt;font-style:normal;" data-sheets-root="1">Copyright author(s). This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.</span> None eng geoscientificInformation