Last Glacial Maximum - CCSM4

Last Glacial Maximum forcing files (b40.lgm21ka.1deg.003)

Set up Notes

The forcing files listed in Table 1 will soon be linked to the SVN input data repository (https://svn-ccsm-inputdata.cgd.ucar.edu/).  You may register for a guest SVN account, or use an existing SVN account and password to download these files directly to your machine.

CMIP5 files on ESG:

CASEIDyears on HPSSCMIP5years on ESG
b40.lgm21ka.1deg.0031499-2405CCSM4_lgm_r1i1p11800-1900
b40.lgm21ka.1deg.003M11870-1900CCSM4_lgm_r2i1p11870-1900

 1 Rerun of last 30 years with high frequency model output

 


Table 1

Atmosphere

Filename

aerodep_flx_file aerosoldep_monthly_1850_mean_1.9x2.5_c090421.nc
bnd_topo topo_lgm21ka_remap_09x25.mod.110106.nc
  

Coupler

 Filename

 MAP_A2OF_FILEmap_fv09_1.25_to_gx1p21k_aave_da_110315.nc
 MAP_A2OS_FILEmap_fv09_1.25_to_gx1p21k_bilin_da_110315.nc
 MAP_O2AF_FILEmap_gx1p21k_to_fv09_1.25_aave_da_110315.nc
 MAP_O2AS_FILEmap_gx1p21k_to_fv09_1.25_bilin_da_110315.nc
 MAP_R2O_FILE_R05map_r05_to_gx1p21k_e1000r300_110315.nc
  

Land

Filename

 fatmlndfrcfracdata_0.9x1.25_lgm21ka.110315.nc
 fsurdatsurfdata_0.9x1.25_lgm21ka.110107.nc
  

Ocean

Filename

 gx1v6_region_idsgx1v6_lgm21ka_region_ids.101028
 gx1v6_overflowgx1v6_lgm21ka_overflow.101029
 topography_filenamekmt_gx1v6_lgm21ka.110315.ieeei4
 regionmask_filenameregion_mask_gx1v6_lgm21ka.110315.ieeei4

 

Component ModelSource ModificationSummary
 Ocean Ocean  vmix_kpp.F90Modifications solve instability problems in Denmark Strait by forcing tidal mixing in lowest 4 KMT levels
 Removed Ross and Weddell Sea overflows
 Atmosphere ctem.F90'TH' commented

 

GHG

ch4vmr             350.0e-9 ppb
co2vmr  185.0e-6 ppm
n2ovmr  200.0e-9 ppb