CESM1 Paleo Idealized Forcing

Among other forcings, past climate variations have been driven by changes in the orbit of earth and greenhouse gas concentrations. These forcings often change concurrently, making it difficult to isolate specific climate responses from the paleoclimate record alone. Here, simulations are run with the NCAR CESM1.2 to isolate the climate responses to different past forcings. In each simulation, only one boundary condition is changed while others remain fixed at preindustrial levels, with the goal of isolating the climate response to individual forcings. The experiments are described below. In each simulation, parameters not mentioned are the same as the preindustrial simulation.

Simulations: * 0ka_0urb: A preindustrial simulation, with the following parameters: Obliquity: 23.44107 degrees; Longitude of perihelion: 102.7242 degrees; eccentricity: 0.01670772; CO2: 284.7 ppm; Ice sheets: 0 ka. * lo_obliq and hi_obliq: Obliquity is set to 22.079 or 24.480 degrees, respectively. * 0_AEQ, 90_WSOL, 180_VEQ, and 270_SSOL: Longitude of the perihelion is set to 0, 90, 180, or 270 degrees. This corresponds to perihelion at the Northern Hemisphere autumnal equinox, winter solstice, vernal equinox, or summer solstice, respectively. Eccentricity is set to 0.0493. * ECC_0: Eccentricity is set to 0, resulting in a perfectly circular orbit. * half_CO2: CO2 is set to 142.35 ppm, half of its preindustrial level.

If you are planning on using these simulations please contact the lead authors of the two reference papers shown below.

Computing resources (ark:/85065/d7wd3xhc) were provided by the Climate Simulation Laboratory at NCAR's Computational and Information Systems Laboratory, sponsored by the National Science Foundation and other agencies.

To Access Resource:

Questions? Email Resource Support Contact:

  • Adam Phillips
    asphilli@ucar.edu
    UCAR/NCAR - Research Data Archive

Keywords

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
Related Links N/A
Additional Information N/A
Resource Format NetCDF (Binary)
Standardized Resource Format NetCDF
Asset Size 0.00 MB
Legal Constraints

Creative Commons Attribution 4.0 International License
Access Constraints None
Software Implementation Language N/A

Resource Support Name Adam Phillips
Resource Support Email asphilli@ucar.edu
Resource Support Organization UCAR/NCAR - Research Data Archive
Distributor NCAR Research Data Archive
Metadata Contact Name N/A
Metadata Contact Email rdahelp@ucar.edu
Metadata Contact Organization NCAR Research Data Archive

Author Erb, M. P.
Bosmans, J. H.
Publisher Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory
Publication Date 2025-05-22
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier d651052
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-05-22T23:05:02Z
Metadata Record Identifier edu.ucar.rda::d651052
Metadata Language eng; USA
Suggested Citation Erb, M. P., Bosmans, J. H.. (2025). CESM1 Paleo Idealized Forcing. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://rda.ucar.edu/datasets/d651052/. Accessed 15 June 2025.

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