!!!! work in progress !!!!

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 CESM-CAM5_CN (1.9x2.5_gx1v6). 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. For more information: CESM1-LME website
You can find known issues with this dataset listed in the same website.

Terms of use


From the CESM project website:
If you are interested in analyzing the CESM-CAM5 Last Millennium Ensemble, we kindly ask that you provide a short description of your proposed research focus and your contact information. Please send this information to Bob Tomas (tomas@ucar.edu) so that other users can see what projects are underway. A list of projects can be found here.
A list of publications using the Last Millennium Ensemble can be found here. If you would like to add a publication to this list, please contact webhelp@cgd.ucar.edu. When presenting results either in oral or written form, please acknowledge the CESM1(CAM5) Last Millennium Ensemble Community Project and supercomputing resources provided by NSF/CISL/Yellowstone. An overview paper of the Last Millennium Ensemble Project should be cited as follows:
Otto-Bliesner, B.L., E.C. Brady, J. Fasullo, A. Jahn, L. Landrum, S. Stevenson, N. Rosenbloom, A. Mai, G. Strand. Climate Variability and Change since 850 C.E.: An Ensemble Approach with the Community Earth System Model (CESM), Bulletin of the American Meteorological Society, 735-754 (May 2016 issue)Article Download[[http://www.cgd.ucar.edu/ccr/ottobli/pubs/BAMS-CESM-LME_accepted-25July2015.pdf|]]]

CESM1-LME on raijin


We downloaded a subset of the entire collection, mostly monthly fields. For each selected variables we downloaded all the available ensembles.
The data was downloaded from the NCAR earth system website and it is hosted as part of the ua6 project.
The location on raijin is:
/g/data1/ua6/CESM1-LME/<realm>/<frequency>/<variable>/<version>/<files>

i.e.

/g/data1/ua6/CESM1-LME/atmos/mon/PS/v6/<files>

NB All the ensembles are stored in the same directory, this is a temporary arrangement!

Atmosphere monthly fields:
  • T - temperature V6
  • TS - surface temperature V7
  • TSMN - minimum temperature V6
  • TSMX - maximum temperature V6
  • PRECT - precipitation V2
  • PS pressure V6
  • PSL sea level pressure V7
  • TAUX zonal surface stress V6
  • TAUY meridional surface stress V6
  • OMEGA - vertical velocity V6

Atmosphere daily fields:
  • Z500 - geopotential height at 500mbar V6

Ocean monthly fields:
  • HBLT - boundary-layer depth V8
  • HMXL - mixed layer depth V8
  • SSH - sea surface height V8
  • SST - potential temperature V8
  • TEMP - potential temperature V8

Ice monthly fields:
  • aice - sea ice area V6

Land monthly fields:
  • QOVER - surface runoff V7
  • QRUNOFF - total liquid runoff V7