CESM2-CISM2 Transient Last Interglacial Simulations

The Transient Last Interglacial dataset contains output from the TransientLIG simulation from 127,000 to 119,000 years before present (127 - 119 ka). This simulation is with the CESM2.1 at the FV1_gx1v6 resolution coupled to CISM2 at 4 km resolution for Greenland. The ice sheet model and the orbital parameters over time (eccentricity, obliquity, and precession) are accelerated - advancing 5 years for each CESM2 year. In CAM6, the surface elevation over Greenland is updated every 10 atmosphere years. Offline coupling of BIOME4 distributions every 500 ice-sheet years allows for incorporation of quasi-dynamic vegetation changes [U.S. Geological Survey data release, https://doi.org/10.5066/P9RPB5KD]. All other forcings (GHGs, aerosols, land-ocean configuration) are kept constant during the TransientLIG simulation.

The dataset also includes a sensitivity simulation (NoBiome) from 127 - 121 ka illustrating the effects of vegetation. This simulation retains the preindustrial no-Anthro vegetation distribution adopted in the CMIP6-PMIP4 127 ka and 6ka equilibrium simulations with CESM2.1 at the FV1_gx1v6 resolution.

The TransientLIG and NoBiome simulations are initialized from the CMIP6-PMIP4 lig127ka simulation with CESM2 [http://doi.org/10.22033/ESGF/CMIP6.7673]. The simulations adopted the initial state of the GrIS from the CESM2-CISM2 JG/BG spinup under pre-industrial climate forcing [https://doi.org/10.26024/4gt3-9r10].

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Resource Type dataset
Temporal Range Begin N/A
Temporal Range End N/A
Temporal Resolution N/A
Bounding Box North Lat N/A
Bounding Box South Lat N/A
Bounding Box West Long N/A
Bounding Box East Long N/A
Spatial Representation N/A
Spatial Resolution N/A
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Additional Information N/A
Resource Format NetCDF
Standardized Resource Format NetCDF
Asset Size 94486384.492 MB
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Creative Commons Attribution 4.0 International License
Access Constraints None
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Resource Support Email datahelp@ucar.edu
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Distributor NSF NCAR Geoscience Data Exchange

Metadata Contact Name N/A
Metadata Contact Email datahelp@ucar.edu
Metadata Contact Organization NSF NCAR Geoscience Data Exchange

Author Sommers, Aleah N. ORCID icon
Otto-Bliesner, Bette L. ORCID icon
Lipscomb, William H. ORCID icon
Lofverstrom, Marcus ORCID icon
Shafer, Sarah L. ORCID icon
Bartlein, Patrick J. ORCID icon
Brady, Esther C. ORCID icon
Kluzek, Erik ORCID icon
Leguy, Gunter R. ORCID icon
Thayer-Calder, Katherine ORCID icon
Tomas, Robert A. ORCID icon
Publisher NSF National Center for Atmospheric Research

Publication Date 2025-07-21
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier d651066
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2026-04-20T03:57:38Z
Metadata Record Identifier edu.ucar.gdex::d651066
Metadata Language eng; USA
Suggested Citation 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 R., Thayer-Calder, Katherine, Tomas, Robert A.. (2025). CESM2-CISM2 Transient Last Interglacial Simulations. NSF National Center for Atmospheric Research. https://gdex.ucar.edu/datasets/d651066. Accessed 20 April 2026.

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