Contacts: Isaac Held, Tom Knutson, Mike Spelman, Tony Broccoli, Ron Stouffer, Peter Phillipps

OVERVIEW

   Mimics the behavior of the GFDL Manabe climate model,
   also known as the "supersource" climate model.

NAMELIST

 The following are the namelist settings necessary
 to invoke the Manabe Climate Model.

 &spectral_dynamics_nml
   damping_option          = 'resolution_indepenent',
   damping_order           = 2,
   damping_coeff           = 1.e16,
   do_mass_correction      =.true.,
   do_energy_correction    =.true.,
   do_water_correction     =.true.,
   vert_advect_uv          = 'second_centered',
   vert_advect_t           = 'second_centered',
   use_virtual_temperature =.false.,
   use_implicit            =.true.,
   longitude_origin        = 0.0,
   robert_coeff            = .04,
   alpha_implicit          = .5,
   vert_difference_option  = 'mcm',
   reference_sea_level_press=101325.,
   lon_max                 = 96,
   lat_max                 = 80,
   num_levels              = 14,
   num_fourier             = 30
   num_spherical           = 31,
   fourier_inc             = 1,
   triang_trunc            =.false.,
   grid_temperature        =.false.,
   topography_option       = 'input',
   vert_coord_option       = 'mcm' /

 &atmosphere_nml
   do_mcm_moist_processes=.true. /

 &transforms_nml 
   check_fourier_imag=.true. /

 &mcm_mca_lsc_nml
   use_mixing_ratio = .true. /

 &ice_model_nml 
    spec_ice       = .true.,
    heat_rough_ice = 3.5e-4,
    mom_rough_ice  = 3.5e-4,
    alb_sno        = 0.80,
    alb_ice        = 0.65 /

 &ocean_rough_nml
    roughness_mom   = 3.5e-4,
    roughness_heat  = 3.5e-4,
    roughness_moist = 3.5e-4 /

 &ocean_albedo_nml
    ocean_albedo_option = 2 /

 &surface_flux_nml
    no_neg_q = .true.,
    use_virtual_temp = .false.,
    alt_gustiness = .true.,
    use_mixing_ratio = .true. /

 &diag_integral_nml
    file_name  = 'diag_integral.out',
    time_units = 'days',
    output_interval = 1.0 /

 &diffusivity_nml
    fixed_depth = .true.,
    depth_0     =  4900.0,
    frac_inner  = .015306122449,
    pbl_mcm     = .true. /

 &rh_clouds_nml
    tuning_coeff_low_cld = 0.937,
    do_mcm_no_clouds_top = .true.,
    do_mcm_crit_rh       = .true. /

 &dry_adj_nml
    itermax = 20,
    small   = 0.01,
    do_mcm_dry_adj = .true. /

 &rad_utilities_nml
    peripherals_source='fms',
    application_type='gcm' /

 &radiation_driver_nml
    rad_time_step=86400,
    zenith_spec='daily_mean', 
    rad_package = 'original_fms',
    do_clear_sky_pass=.true.,
    use_mixing_ratio=.true. /

 &original_fms_rad_nml
    do_mcm_radiation = .true. /

 &radiative_gases_nml
    ch4_data_source  = 'absent',
    n2o_data_source  = 'absent',
    f11_data_source  = 'absent',
    f12_data_source  = 'absent',
    f113_data_source = 'absent',
    f22_data_source  = 'absent',
    co2_data_source  = 'input' /

 &physics_driver_nml
    do_moist_process = .false. /

 &vert_diff_driver_nml
    do_conserve_energy         = .true.,
    do_mcm_no_neg_q            = .true.,
    use_virtual_temp_vert_diff = .false.,
    do_mcm_plev                = .true.,
    do_mcm_vert_diff_tq        = .true. /

 &clouds_nml
    do_isccp_cloud_diags = .true. /

 &vert_turb_driver_nml
    do_mellor_yamada = .false.,
    do_diffusivity = .true. /

 &monin_obukhov_nml
    neutral = .true. /

 &ozone_nml 
   do_mcm_o3_clim= .true. /

 &damping_driver_nml
    do_conserve_energy = .true.,
    trayfric = -20.,
    do_mg_drag = .true.    /

 &mg_drag_nml
    xl_mtn       = 45454.545,
    low_lev_frac = 0.15,
    do_conserve_energy = .true.,
    do_mcm_mg_drag = .true. /

 &soil_nml
    n_levels = 1,
    dz = 0.001 /

 &land_properties_nml
    do_all_mcm = .true. /

INPUT FILES

 Execute lhe following commands in the work directory to get
 the input data files needed for the Manabe Climate Model:

 /home/fms/bin/get_fms_data -r havana ggrpsst lad oldrad mcm
 cp /archive/fms/grids/exchange/havana/R30_MCM.nc  INPUT/grid_spec.nc


 Specify co2 concentration in an ascii file named INPUT/id1co2
 For example: echo "3.6e-4" > INPUT/id1co2


 Because water vapor is now a tracer, it must be specified in the field_table.
 The field_table needed to do this is as follows:

 "TRACER", "atmos_mod",                "mix_rat"
           "longname",                 "mixing ratio"
           "units",                    "kg/kg"
           "numerical_representation", "spectral"
           "hole_filling",             "on"
           "advect_vert",              "FOURTH_CENTERED" /

MODIFIED FILES