edu.ucar.opensky::articles:43878 UCAR/NCAR - Library OpenSky Support PO Box 3000 Boulder CO 80307-3000 opensky@ucar.edu http://opensky.ucar.edu/ homepage pointOfContact 2025-12-24T17:45:39.480641 ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data ISO 19115-2:2009(E) https://n2t.net/ark:/85065/d72f7sw2 https://doi.org/10.22033/ESGF/CMIP6.4842 https Related Dataset #1 EC-Earth-Consortium EC-Earth3 model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.5251 https Related Dataset #2 IPSL IPSL-CM6A-LR model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.6294 https Related Dataset #3 MOHC HadGEM3-GC31-LL model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.6297 https Related Dataset #4 MOHC HadGEM3-GC31-MM model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.6674 https Related Dataset #5 MPI-M MPI-ESM1.2-HR model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.6675 https Related Dataset #6 MPI-M MPI-ESM1.2-LR model output prepared for CMIP6 CMIP piControl https://doi.org/10.22033/ESGF/CMIP6.7733 https Related Dataset #7 NCAR CESM2 model output prepared for CMIP6 CMIP piControl A weakened AMOC could cause Southern Ocean temperature and sea‐ice change on multidecadal timescales 2025-07-01T00:00:00Z publication https://n2t.net/ark:/85065/d72f7sw2 https://doi.org/10.1029/2024JC022027 Diamond, R. author Sime, L. C. author Schroeder, D. author Jackson, L. C. author Holland, P. R. author de Asenjo, E. A. author Bellomo, K. author Danabasoglu, Gokhan author Hu, Aixue author Jungclaus, J. author Montoya, M. author Meccia, V. L. author Saenko, O. A. author Swingedouw, D. author UCAR/NCAR - Library publisher We present the first CMIP6&#8208;era multi&#8208;model intercomparison of the Southern Ocean (SO) temperature and sea&#8208;ice response to substantial Atlantic meridional overturning circulation (AMOC) weakening. Results are based on analysis of the North Atlantic Hosing Model Intercomparison Project, involving eight CMIP6 models under identical North Atlantic freshwater hosing. On multidecadal timescales, we find that southwards ocean heat transport into the SO increases, causing surface warming and sea&#8208;ice loss. Additionally, an atmospheric tropical&#8208;Antarctic teleconnection, identified here for the first time, causes regional temperature and sea&#8208;ice changes in the SO. Unlike previous studies, we find that the Amundsen Sea Low deepens for only some models. Overall, in the multi&#8208;model ensemble mean (multi&#8208;model range in brackets), over years 50&#8211;100 after AMOC weakening: SO surface air temperature warms by 0.3 (0.1&#8211;0.7)&#176;C, sea level pressure (SLP) decreases by 30 (10&#8211;70) Pa, and sea&#8208;ice area decreases by 0.4 (&#8722;0.2&#8211;1.3) Mkm 2 . The teleconnection leads to regional differences between the response in the Indian sector and the Weddell Sea of 180 (80&#8211;320) Pa in SLP, 0.6 (0.5&#8211;1.4)&#176;C in surface air temperature, and 0.1 (0.1&#8211;0.2) Mkm 2 in sea&#8208;ice area. These SO heat transport, temperature, pressure, and sea&#8208;ice changes are small relative to the changes expected under future anthropogenic warming, despite the large and idealized 0.3&#160;Sv hosing used to weaken the AMOC. 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 <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