Extend CCSM4 AMIP runs through 2008

[chrisbs@umich_edu]

Hi,I would like to run CCSM4 in AMIP format from 1979-2008.  According to the list of CMIP5 experiments (http://www.cesm.ucar.edu/experiments/cesm1.0/#amip), CCSM4 was run in AMIP format from 1979-2010.  I created a case for the CCSM4 AMIP run using the F_AMIP_CN compset (and turned off the CN). Most of the input datasets extend through 2005, but not 2008.  I came across this post:  https://bb.cgd.ucar.edu/amip-input-tapes-not-available-anything-through-2010    which says it is not possible to run CAM4 through 2010 because the datasets don't exist.  Is it true that CAM4 cannot run through 2008 with inputdatasets provided in the repository?  Does anyone know how the CMIP5 CCSM4 AMIP experiments ran through 2010?Thanks for any insights!- Chris

 

[hannay]

We don't have datasets for everything but we do have them for SSTs and greenhouse gases. The way you could extent your run is to use RCP4.5 dataset for the missing datset.Something like:prescribed_volcaero_datapath        = '$inputdata/atm/cam/volc'prescribed_volcaero_file             = 'CCSM4_volcanic_1850-2009_prototype1.nc' solar_data_file= '$inputdata/atm/cam/solar/SOLAR_TSI_Lean_1610-2140_annual_c100301.nc'
 bndtvghg         = '$inputdata/atm/cam/ggas/ghg_hist_1765-2012_c130501.nc'
 prescribed_aero_datapath     = '$inputdata/atm/cam/chem/trop_mozart_aero/aero'
 prescribed_aero_file           = 'aero_rcp45_v1_1.9x2.5_L26_1995-2105_c100316.nc'
 prescribed_aero_type             = 'INTERP_MISSING_MONTHS'
 prescribed_aero_ymd                = 0
 prescribed_ozone_datapath          = '$inputdata/atm/cam/ozone'
 prescribed_ozone_file                    = 'ozone_rcp45_v1_1.9x2.5_L26_1995-2105_c100316.nc'
 prescribed_ozone_name                = 'O3'
 prescribed_ozone_type                  = 'INTERP_MISSING_MONTHS'
 prescribed_ozone_ymd                     = 0
 scenario_ghg                                   = 'RAMPED'
 You need to set the path $inputdata where these file live. 

 

[chrisbs@umich_edu]

Thank you for your response!  I will give it a shot.  Regards,Chris