Add basic atmos products for GEFS and refactor resources (NOAA-EMC#2216)

* Add basic atmos products for GEFS

Adds basic atmosphere products for GEFS members (no mean or spread).

To facilitate the addition of GEFS parameter lists, the existing GFS
lists are renamed. They are also relocated to `parm/products/` direc
tory instead of `parm/post/`. GEFS v12 uses different parameter lists
for different resolutions, but for this implementation, the 0p25 lists
are used for all resolutions. However, to hedge against the final con-
figuration, all of the GEFS parameter lists have been added to parm.
Implementation of different parameter lists for each resolution will
take additional refactoring of the atmos_products job, as it currently
assumes all resolutions use the same lists.

The new GEFS rocoto task is implented as two loops of metatasks (made
possible by PR NOAA-EMC#2189). The member is set at the rocoto level, so the
setting in `config.base` had to be updated to accept a pass-through.
The generation of a forecast hour list is moved up to its own function
in `rocoto.tasks`, separate from the post groups which are not used.
This can be used as a model for future metatasks (or refactoring of old
ones). `rocoto_viewer.py` does function with the nested metatasks,
though only one level of folding is available and the metatask name
is that of the lower metatask (though it encompasses the entire outer
metatask).

Additionally, the GEFS `config.resources` had diverged from the GFS
version, which included not having a section for the atm products job.
This led to the refactoring of the GFS `config.resources`, including
switching to using a `case` statement instead of sequential `elif`.
This refactored script was then copied over to GEFS, replacing the old
one, with all jobs not currently implemented for GEFS removed (except
wave post, whose inclusion is immenent). New blocks can be copied over
from GFS as they are added.

Resolves NOAA-EMC#823

parm/config/gefs/config.atmos_products

@@ -0,0 +1,28 @@
+#! /usr/bin/env bash
+
+########## config.atmos_products ##########
+# atmosphere grib2 products specific
+
+echo "BEGIN: config.atmos_products"
+
+# Get task specific resources
+. "${EXPDIR}/config.resources" atmos_products
+
+# No. of forecast hours to process in a single job
+export NFHRS_PER_GROUP=3
+
+# Scripts used by this job
+export INTERP_ATMOS_MASTERSH="${HOMEgfs}/ush/interp_atmos_master.sh"
+export INTERP_ATMOS_SFLUXSH="${HOMEgfs}/ush/interp_atmos_sflux.sh"
+
+export downset=2
+export FHOUT_PGBS=${FHOUT_GFS:-3}  # Output frequency of supplemental gfs pgb file at 1.0 and 0.5 deg
+export FLXGF="NO"  # Create interpolated sflux.1p00 file
+
+# paramlist files for the different forecast hours and downsets
+export paramlista="${HOMEgfs}/parm/product/gefs.0p25.fFFF.paramlist.a.txt"
+export paramlista_anl="${HOMEgfs}/parm/product/gefs.0p25.anl.paramlist.a.txt"
+export paramlista_f000="${HOMEgfs}/parm/product/gefs.0p25.f000.paramlist.a.txt"
+export paramlistb="${HOMEgfs}/parm/product/gefs.0p25.fFFF.paramlist.b.txt"
+
+echo "END: config.atmos_products"

parm/config/gefs/config.base.emc.dyn

@@ -218,6 +218,7 @@ export gfs_cyc=@gfs_cyc@ # 0: no GFS cycle, 1: 00Z only, 2: 00Z and 12Z only, 4:
 
 # GFS output and frequency
 export FHMIN_GFS=0
+export FHMIN=${FHMIN_GFS}
 
 export FHMAX_GFS_00=120
 export FHMAX_GFS_06=120
@@ -270,7 +271,7 @@ export NMEM_ENS=@NMEM_ENS@
 
 # set default member number memdir for control
 # this will be overwritten for the perturbed members
-export ENSMEM="000"
+export ENSMEM=${ENSMEM:-"000"}
 export MEMDIR="mem${ENSMEM}"
 
 export DOIAU="NO"  # While we are not doing IAU, we may want to warm start w/ IAU in the future