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.


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_FILE map_fv09_1.25_to_gx1p21k_aave_da_110315.nc
 MAP_A2OS_FILE map_fv09_1.25_to_gx1p21k_bilin_da_110315.nc
 MAP_O2AF_FILE map_gx1p21k_to_fv09_1.25_aave_da_110315.nc
 MAP_O2AS_FILE map_gx1p21k_to_fv09_1.25_bilin_da_110315.nc
 MAP_R2O_FILE_R05 map_r05_to_gx1p21k_e1000r300_110315.nc
   

Land

Filename

 fatmlndfrc fracdata_0.9x1.25_lgm21ka.110315.nc
 fsurdat surfdata_0.9x1.25_lgm21ka.110107.nc
   

Ocean

Filename

 gx1v6_region_ids gx1v6_lgm21ka_region_ids.101028
 gx1v6_overflow gx1v6_lgm21ka_overflow.101029
 topography_filename kmt_gx1v6_lgm21ka.110315.ieeei4
 regionmask_filename region_mask_gx1v6_lgm21ka.110315.ieeei4

 

Component ModelSource ModificationSummary
 Ocean Ocean   vmix_kpp.F90 Modifications 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