Overview

Version 17 of the Global Forecast System (GFS) is scheduled for operational implementation by the NOAA National Centers for Environmental Prediction (NCEP) in 2024. The GFS_v17_p8 suite is a prototype of the GFS_v17 suite, and is expected to evolve before the implementation. It is available for use with the CCPP SCM. The primary differences between the GFS_v16 and GFS_v17_p8 suites are:

Microphysics: The replacement of GFDL Cloud Microphysics Scheme with Thompson Aerosol-Aware Cloud Microphysics Scheme
Deep Cumulus: Add Cellular Automata Stochastic Convective Organization Scheme
Gravity Wave Drag: The replacement of Unified Gravity Wave Physics Scheme - Version 0 with GFS Unified UGWP Scheme
Land Surface Model: The replacement of GFS Noah Land Surface Model with GFS NoahMP Land Surface Model

The GFS_v17_p8 suite uses the parameterizations in the following order:

Suite Definition File

<?xml version="1.0" encoding="UTF-8"?>
 
<suite name="SCM_GFS_v17_p8" version="1">
  <!-- <init></init> -->
  <group name="time_vary">
    <subcycle loop="1">
      <scheme>GFS_time_vary_pre</scheme>
      <scheme>GFS_rrtmg_setup</scheme>
      <scheme>GFS_rad_time_vary</scheme>
      <scheme>GFS_phys_time_vary</scheme>
    </subcycle>
  </group>
  <group name="radiation">
    <subcycle loop="1">
      <scheme>GFS_suite_interstitial_rad_reset</scheme>
      <scheme>GFS_rrtmg_pre</scheme>
      <scheme>GFS_radiation_surface</scheme>
      <scheme>rad_sw_pre</scheme>
      <scheme>rrtmg_sw</scheme>
      <scheme>rrtmg_sw_post</scheme>
      <scheme>rrtmg_lw_pre</scheme>
      <scheme>rrtmg_lw</scheme>
      <scheme>rrtmg_lw_post</scheme>
      <scheme>GFS_rrtmg_post</scheme>
    </subcycle>
  </group>
  <group name="physics">
    <subcycle loop="1">
      <scheme>GFS_suite_interstitial_phys_reset</scheme>
      <scheme>GFS_suite_stateout_reset</scheme>
      <scheme>get_prs_fv3</scheme>
      <scheme>GFS_suite_interstitial_1</scheme>
      <scheme>GFS_surface_generic_pre</scheme>
      <scheme>GFS_surface_composites_pre</scheme>
      <scheme>dcyc2t3</scheme>
      <scheme>GFS_surface_composites_inter</scheme>
      <scheme>GFS_suite_interstitial_2</scheme>
    </subcycle>
    <!-- Surface iteration loop -->
    <subcycle loop="2">
      <scheme>sfc_diff</scheme>
      <scheme>GFS_surface_loop_control_part1</scheme>
      <scheme>sfc_nst_pre</scheme>
      <scheme>sfc_nst</scheme>
      <scheme>sfc_nst_post</scheme>
      <scheme>noahmpdrv</scheme>
      <scheme>sfc_sice</scheme>
      <scheme>GFS_surface_loop_control_part2</scheme>
    </subcycle>
    <!-- End of surface iteration loop -->
    <subcycle loop="1">
      <scheme>GFS_surface_composites_post</scheme>
      <scheme>sfc_diag</scheme>
      <scheme>sfc_diag_post</scheme>
      <scheme>GFS_surface_generic_post</scheme>
      <scheme>GFS_PBL_generic_pre</scheme>
      <scheme>satmedmfvdifq</scheme>
      <scheme>GFS_PBL_generic_post</scheme>
      <scheme>GFS_GWD_generic_pre</scheme>
      <scheme>unified_ugwp</scheme>
      <scheme>unified_ugwp_post</scheme>
      <scheme>GFS_GWD_generic_post</scheme>
      <scheme>GFS_suite_stateout_update</scheme>
      <scheme>ozphys_2015</scheme>
      <scheme>h2ophys</scheme>
      <scheme>get_phi_fv3</scheme>
      <scheme>GFS_suite_interstitial_3</scheme>
      <scheme>GFS_DCNV_generic_pre</scheme>
      <scheme>samfdeepcnv</scheme>
      <scheme>GFS_DCNV_generic_post</scheme>
      <scheme>GFS_SCNV_generic_pre</scheme>
      <scheme>samfshalcnv</scheme>
      <scheme>GFS_SCNV_generic_post</scheme>
      <scheme>GFS_suite_interstitial_4</scheme>
      <scheme>cnvc90</scheme>
      <scheme>GFS_MP_generic_pre</scheme>
      <scheme>mp_thompson_pre</scheme>
      </subcycle>
      <subcycle loop="1">
        <scheme>mp_thompson</scheme>
      </subcycle>
        <subcycle loop="1">
        <scheme>mp_thompson_post</scheme>
        <scheme>GFS_MP_generic_post</scheme>
        <scheme>maximum_hourly_diagnostics</scheme>
        <scheme>phys_tend</scheme>
      </subcycle>
    </group>
  <!-- <finalize></finalize> -->
</suite>

Namelist

General physics options
&gfs_physics_nml

fhzero = 6

h2o_phys = .true.

ldiag3d = .true.

qdiag3d = .true.

print_diff_pgr = .false.

fhcyc = 24

use_ufo = .true.

pre_rad = .false.

imp_physics = 8

iovr = 3

ltaerosol = .false.

lradar = .false.

ttendlim = -999

dt_inner = 300.0

sedi_semi = .true.

decfl = 10

oz_phys = .false.

oz_phys_2015 = .true.

lsoil_lsm = 4

do_mynnedmf = .false.

do_mynnsfclay = .false.

icloud_bl = 1

bl_mynn_edmf = 1

bl_mynn_tkeadvect = .true.

bl_mynn_edmf_mom = 1

do_ugwp = .false.

do_tofd = .false.

gwd_opt = 2

do_ugwp_v0 = .true.

do_ugwp_v1 = .false.

do_ugwp_v0_orog_only = .false.

do_ugwp_v0_nst_only = .false.

do_gsl_drag_ls_bl = .false.

do_gsl_drag_ss = .true.

do_gsl_drag_tofd = .true.

do_ugwp_v1_orog_only = .false.

min_lakeice = 0.15

min_seaice = 0.15

use_cice_alb = .false.

pdfcld = .false.

fhswr = 1200.

fhlwr = 1200.

ialb = 2

iems = 2

iaer = 5111

icliq_sw = 2

ico2 = 2

isubc_sw = 2

isubc_lw = 2

isol = 2

lwhtr = .true.

swhtr = .true.

cnvgwd = .true.

shal_cnv = .true.

cal_pre = .false.

redrag = .true.

dspheat = .true.

hybedmf = .false.

satmedmf = .true.

isatmedmf = 1

lheatstrg = .true.

lseaspray = .true.

random_clds = .false.

trans_trac = .true.

cnvcld = .true.

imfshalcnv = 2

imfdeepcnv = 2

ras = .false.

cdmbgwd = 0.14,1.8,1.0,1.0

prslrd0 = 0.

ivegsrc = 1

isot = 1

lsoil = 4

lsm = 2

iopt_dveg = 4

iopt_crs = 2

iopt_btr = 1

iopt_run = 1

iopt_sfc = 3

iopt_trs = 2

iopt_frz = 1

iopt_inf = 1

iopt_rad = 3

iopt_alb = 1

iopt_snf = 4

iopt_tbot = 2

iopt_stc = 3

debug = .false.

nstf_name = 2,1,0,0,0

nst_anl = .true.

psautco = 0.0008,0.0005

prautco = 0.00015,0.00015

lgfdlmprad = .false.

effr_in = .true.

ldiag_ugwp = .false.

fscav_aero = "'*:0.0'"

do_sppt = .false.

do_shum = .false.

do_skeb = .false.

do_RRTMGP = .false.

doGP_cldoptics_LUT = .true.

doGP_lwscat = .true.

active_gases = 'h2o_co2_o3_n2o_ch4_o2'

ngases = 6

rrtmgp_root = '../../ccpp/physics/physics/rte-rrtmgp/'

lw_file_gas = 'rrtmgp/data/rrtmgp-data-lw-g128-210809.nc'

lw_file_clouds = 'extensions/cloud_optics/rrtmgp-cloud-optics-coeffs-lw.nc'

sw_file_gas = 'rrtmgp/data/rrtmgp-data-sw-g112-210809.nc'

sw_file_clouds = 'extensions/cloud_optics/rrtmgp-cloud-optics-coeffs-sw.nc'

rrtmgp_nGptsSW = 112

rrtmgp_nGptsLW = 128

rrtmgp_nBandsLW = 16

rrtmgp_nBandsSW = 14

frac_grid = .true.

cplchm = .false.

cplflx = .false.

cplice = .false.

cplwav = .false.

cplwav2atm = .false.

do_ca = .false.

ca_global = .false.

ca_sgs = .false.

nca = 1

ncells = 5

nlives = 12

nseed = 1

nfracseed = 0.5

nthresh = 18

ca_trigger = .true.

nspinup = 1

iseed_ca = 12345

lndp_type = 0

n_var_lndp = 0

/
GFS Unified UGWP Scheme related options
&cires_ugwp_nml

knob_ugwp_solver = 2

knob_ugwp_source = 1,1,0,0

knob_ugwp_wvspec = 1,25,25,25

knob_ugwp_azdir = 2,4,4,4

knob_ugwp_stoch = 0,0,0,0

knob_ugwp_effac = 1,1,1,1

knob_ugwp_doaxyz = 1

knob_ugwp_doheat = 1

knob_ugwp_dokdis = 1

knob_ugwp_ndx4lh = 1

knob_ugwp_version = 0

launch_level = 54

/
nstf_name = \([2,0,0,0,0]^1 [2,1,0,0,0]^2\)
- \(^1\) NSST is on and coupled with spin up off
- \(^2\) NSST is on and coupled with spin up on