Prepare Base Run Script

PREPARE RUN SCRIPT FOR BASIC CASES

Setting up the Run Script

The GSI run script ush/comgsi_run_regional.ksh, which is provided with the source code, must be customized to the local environment. These changes include things such as the analysis time and date, the path to files, and MPI specific information, which are necessary for running all of tutorial cases.

For this tutorial, start by copying the original run script to a working copy

cd ${PATH of working directory}/run

cp ${PATH}/comGSIv3.7_EnKFv1.3/ush/comgsi_run_regional.ksh run_gsi_regional.ksh_basic

This will be used as the template for all the later scripts used in the regional practice.

Make the following modifications to the script run_gsi_regional.ksh_basic

#PBS -A PXXXXXXXX #PBS -l walltime=00:20:00 #PBS -N basic #PBS -l select=1:ncpus=4:mpiprocs=4 #PBS -q premium #PBS -o out.basic #PBS -j oe

On top of the scripts, add an appropriate batch script. For example on Cheyenne:
Set the variable GSIPROC to 4
Set the variable ARCH to LINUX_PBS, as an example value appropriate for Linux with PBS.
In the case set up section of the script, set the environment variables to values appropriate for your environment on your machine. For example:

ANAL_TIME=2018081212

JOB_DIR=/gpfs/fs1/p/ral/jntp/mhu/gsi/v37/run

RUN_NAME=basic

OBS_ROOT=/glade/p/ral/jntp/DAtask/case_data/2018081212/obs

BK_ROOT=/glade/p/ral/jntp/DAtask/case_data/2018081212/bkg

GSI_ROOT=/gpfs/fs1/p/ral/jntp/mhu/gsi/v37/comGSIv3.7_EnKFv1.3

CRTM_ROOT=/glade/p/ral/jntp/DAtask/case_data/CRTM_2.2.3

ENS_ROOT=/glade/p/ral/jntp/DAtask/case_data/2018081212/gfsens

HH=`echo $ANAL_TIME | cut -c9-10`

GSI_EXE=${JOB_DIR}/gsi.x #assume you have a copy of gsi.x here

WORK_ROOT=${JOB_DIR}/${RUN_NAME}

FIX_ROOT=${GSI_ROOT}/fix

GSI_NAMELIST=${GSI_ROOT}/ush/comgsi_namelist.sh

PREPBUFR=${OBS_ROOT}/rap.t${HH}z.prepbufr.tm00

BK_FILE=${BK_ROOT}/wrfout_d01_2018-08-12_12:00:00

This example is only for ARW core background files.

if_hybrid=No     # Yes, or, No -- case sensitive !

if_4DEnVar=No    # Yes, or, No -- case sensitive (set if_hybrid=Yes first)!

if_observer=No   # Yes, or, No -- case sensitive !

if_nemsio=No     # Yes, or, No -- case sensitive !

if_oneob=No      # Yes, or, No -- case sensitive !

bk_core=ARW

bkcv_option=NAM

if_clean=clean

Still in case set up setion, leave the following settings as default:
Search Section # Link to the radiance data, look for the list of observations and comment the links to the BUFR file under this section:

# ln -s ${srcobsfile[$ii]} ${gsiobsfile[$ii]}

PREPARE RUN SCRIPT AND ANAVINFO FILE FOR BASIC CASES

submit run script

The basic run script can be submitted by if use Cheyenne:

qsub run_gsi_regional.ksh_basic

An example of this basic run script is available from the link run_gsi_regional.ksh_basic

check the results

After job finished, a new directory ./basic will appear under current directory. The files in directory ./basic is listed here and the stdout from this basic run is available here