CESM1 Last Millennium Ensemble

The CESM Paleoclimate Working Group at NCAR conducted a series of Last Millennium community experiments, referred to as the Last Millennium Ensemble (LME). The LME used a ~2-degree atmosphere and land, ~1-degree ocean and sea ice version of CESM1 (CAM5). Ensemble members extend from 850 to 2006 using reconstructions for the transient evolution of solar intensity, volcanic emissions, greenhouse gases, aerosols, land use conditions, and orbital parameters, together and individually. We have completed 36 simulations for the LME project: 13 simulations with all transient forcings, smaller ensembles with each transient forcing separately, and long 1850 and 850 control simulations. Ensemble spread is generated using round-off differences in the initial atmospheric state. Monthly, daily, and 6-hourly outputs are available.

More information about this dataset can be found on the CESM1 Last Millennium Ensemble Project website [https://www.cesm.ucar.edu/community-projects/lme].

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

Related Resource #1 : CESM1 Last Millennium Ensemble Project
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 B. L. Otto-Bliener
E. C. Brady
J. Fasullo
A. Jahn
L. Landrum
S. Stevenson
N. Rosenbloom
A. Mai
G. Strand
Publisher Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory
Publication Date 2025-07-03
Digital Object Identifier (DOI) Not Assigned
Alternate Identifier d651058
Resource Version N/A
Topic Category climatologyMeteorologyAtmosphere
Progress completed
Metadata Date 2025-07-03T19:05:02Z
Metadata Record Identifier edu.ucar.rda::d651058
Metadata Language eng; USA
Suggested Citation B. L. Otto-Bliener, E. C. Brady, J. Fasullo, A. Jahn, L. Landrum, S. Stevenson, N. Rosenbloom, A. Mai, G. Strand. (2025). CESM1 Last Millennium Ensemble. Research Data Archive at the National Center for Atmospheric Research, Computational and Information Systems Laboratory. https://rda.ucar.edu/datasets/d651058/. Accessed 29 July 2025.

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