Climate and Global Dynamics Laboratory National Center for Atmospheric Research Boulder CO USA, Now at Thayer School of Engineering Dartmouth College Hanover NH USA
Climate and Global Dynamics Laboratory National Center for Atmospheric Research Boulder CO USA
Department of Geosciences University of Arizona Tucson AZ USA
U.S. Geological Survey Corvallis OR USA
Department of Geography University of Oregon Eugene OR USA
During the Last Interglacial, approximately 129 to 116 ka (thousand years ago), the Arctic summer climate was warmer than the present, and the Greenland Ice Sheet retreated to a smaller extent than its current state. Previous model‐derived and geological reconstruction estimates of the sea‐level contribution of the Greenland Ice Sheet during the Last Interglacial vary widely. Here, we conduct a transient climate simulation from 127 to 119 ka using the Community Earth System Model (CESM2), which includes a dynamic ice sheet component (the Community Ice Sheet Model, CISM2) that is interactively coupled to the atmosphere, land, ocean, and sea ice components. Vegetation distribution is updated every 500 years based on biomes simulated using a monthly climatology to force the BIOME4 equilibrium vegetation model. Results show a substantial retreat of the Greenland Ice Sheet, reaching a minimum extent at 121.9 ka, equivalent to a 3.0 m rise in sea level relative to the present day, followed by gradual regrowth. In contrast, a companion simulation employing static vegetation based on pre‐industrial conditions shows a much smaller ice‐sheet retreat, highlighting the importance of the changes in high‐latitude vegetation distribution for amplifying the ice‐sheet response.
Sommers, Aleah N., et al. "Retreat and Regrowth of the Greenland Ice Sheet During the Last Interglacial as Simulated by the CESM2‐CISM2 Coupled Climate–Ice Sheet Model." Paleoceanography and Paleoclimatology, vol. 36, no. 12, Dec. 2021. https://doi.org/10.1029/2021PA004272
Sommers, Aleah N., Otto‐Bliesner, Bette L., Lipscomb, William H., Lofverstrom, Marcus, Shafer, Sarah L., Bartlein, Patrick J., Brady, Esther C., Kluzek, Erik, Leguy, Gunter, Thayer‐Calder, Katherine, & Tomas, Robert A. (2021). Retreat and Regrowth of the Greenland Ice Sheet During the Last Interglacial as Simulated by the CESM2‐CISM2 Coupled Climate–Ice Sheet Model. Paleoceanography and Paleoclimatology, 36(12). https://doi.org/10.1029/2021PA004272
Sommers, Aleah N., Otto‐Bliesner, Bette L., Lipscomb, William H., et al., "Retreat and Regrowth of the Greenland Ice Sheet During the Last Interglacial as Simulated by the CESM2‐CISM2 Coupled Climate–Ice Sheet Model," Paleoceanography and Paleoclimatology 36, no. 12 (2021), https://doi.org/10.1029/2021PA004272
@article{osti_1836164,
author = {Sommers, Aleah N. and Otto‐Bliesner, Bette L. and Lipscomb, William H. and Lofverstrom, Marcus and Shafer, Sarah L. and Bartlein, Patrick J. and Brady, Esther C. and Kluzek, Erik and Leguy, Gunter and Thayer‐Calder, Katherine and others},
title = {Retreat and Regrowth of the Greenland Ice Sheet During the Last Interglacial as Simulated by the CESM2‐CISM2 Coupled Climate–Ice Sheet Model},
annote = {Abstract During the Last Interglacial, approximately 129 to 116 ka (thousand years ago), the Arctic summer climate was warmer than the present, and the Greenland Ice Sheet retreated to a smaller extent than its current state. Previous model‐derived and geological reconstruction estimates of the sea‐level contribution of the Greenland Ice Sheet during the Last Interglacial vary widely. Here, we conduct a transient climate simulation from 127 to 119 ka using the Community Earth System Model (CESM2), which includes a dynamic ice sheet component (the Community Ice Sheet Model, CISM2) that is interactively coupled to the atmosphere, land, ocean, and sea ice components. Vegetation distribution is updated every 500 years based on biomes simulated using a monthly climatology to force the BIOME4 equilibrium vegetation model. Results show a substantial retreat of the Greenland Ice Sheet, reaching a minimum extent at 121.9 ka, equivalent to a 3.0 m rise in sea level relative to the present day, followed by gradual regrowth. In contrast, a companion simulation employing static vegetation based on pre‐industrial conditions shows a much smaller ice‐sheet retreat, highlighting the importance of the changes in high‐latitude vegetation distribution for amplifying the ice‐sheet response.},
doi = {10.1029/2021PA004272},
url = {https://www.osti.gov/biblio/1836164},
journal = {Paleoceanography and Paleoclimatology},
issn = {ISSN 2572-4517},
number = {12},
volume = {36},
place = {United Kingdom},
publisher = {American Geophysical Union (AGU)},
year = {2021},
month = {12}}
Otto-Bliesner, Bette L.; Rosenbloom, Nan; Stone, Emma J.
Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 371, Issue 2001https://doi.org/10.1098/rsta.2013.0097