Last Glacial Maxium CCSM4

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

  • Set up Notes
  • Case Directory:  /glade/p/cesmdata/cseg/runs/ccsm4_0/b40.lgm21ka.1deg.003
  • HPSS Path:  /CCSM/csm/b40.lgm21ka.1deg.003/Forcing-Setup

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:

CASEID years on HPSS CMIP5 years on ESG
b40.lgm21ka.1deg.003 1499-2405 CCSM4_lgm_r1i1p1 1800-1900
b40.lgm21ka.1deg.003M1 1870-1900 CCSM4_lgm_r2i1p1 1870-1900

 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_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 (src.pop.tar)
 gx1v6_overflow gx1v6_lgm21ka_overflow.101029  (src.pop.tar)
 topography_filename kmt_gx1v6_lgm21ka.110315.ieeei4
 regionmask_filename region_mask_gx1v6_lgm21ka.110315.ieeei4

Restart files

 

 
2100-01-01 restart tar file (CAUTION:  This file is 2.1G)

 

Component Model Source Modification Summary
 Ocean Ocean   vmix_kpp.F90 (src.pop.tar) 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 (src.cam.tar) 'TH' commented

 

GHG

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