Community GSIv3.5 Online Tutorial
Prepare run script and anavinfo file for basic cases
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Setting up the Run Script
The GSI run script
run/run_gsi_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 the basic tutorial cases.For this tutorial, start by copying the original run script to a working copy
cd ${PATH}/comGSIv3.5_EnKFv1.1/run/
cp run_gsi_regional.ksh run_gsi_regional.ksh_basic
This will be used as the template for all the later scripts used in the regional practice.Make the following modifications to the script
run_gsi_regional.ksh_basic
- Set the variable
GSIPROC
to 4- Set the variable
ARCH
toLINUX_LSF
, as an example value appropriate for Linux with LSF.- In the case set up section of the script, set the environment variables to values appropriate for your environment on your machine. For example:
ANAL_TIME=2014061700
WORK_ROOT=${PATH}/comGSIv3.5_EnKFv1.1/run/arw_${ANAL_TIME}
OBS_ROOT=${DATA_ROOT}/data/20140617/2014061700/obs
PREPBUFR=${OBS_ROOT}/nam.t00z.prepbufr.tm00.nr
BK_ROOT and BK_FILE
- For ARW:
BK_ROOT=${DATA_ROOT}/data/20140617/2014061700/arw
BK_FILE=/${BK_ROOT}/wrfinput_d01.2014061700
- For NMM:
BK_ROOT=${DATA_ROOT}/data/20140617/2014061700/nmm
BK_FILE=/${BK_ROOT}/wrfinput_d01.2014061700
CRTM_ROOT=${PATH_CRTM}/CRTM_2.2.3
GSI_ROOT=${PATH}/comGSIv3.5_EnKFv1.1
FIX_ROOT=${GSI_ROOT}/fix
GSI_EXE=${GSI_ROOT}/run/gsi.exe
The difference between the ARW core and NMM core is the directory name ( GSI_NAMELIST=${GSI_ROOT}/run/comgsi_namelist.sh
BK_ROOT
) that holds the background files.
On top of the scripts, add an appropriate batch script. For example on Yellowstone: #BSUB -W 00:15 # wall-clock time (hrs:mins) #BSUB -n 4 # number of tasks in job #BSUB -R "span[ptile=16]" # run 16 MPI tasks per node #BSUB -J gsi # job name #BSUB -o gsi.%J.out # output file name #BSUB -e gsi.%J.err # error file name #BSUB -q regular # queue
Still in case set up setion, we didn't change the setups in the last three variables:
bk_core=ARW
bkcv_option=NAM
if_clean=clean
Search Section # Link to the radiance data, comment out the links to the BUFR file under this section: # ln -s ${OBS_ROOT}/gdas1.t${HH}z.1bamua.tm00.bufr_d amsuabufr
# ln -s ${OBS_ROOT}/gdas1.t${HH}z.1bamub.tm00.bufr_d amsubbufr
# ln -s ${OBS_ROOT}/gdas1.t${HH}z.1bhrs4.tm00.bufr_d hirs4bufr
# ln -s ${OBS_ROOT}/gdas1.t${HH}z.1bmhs.tm00.bufr_d mhsbufr
# ln -s ${OBS_ROOT}/gdas1.t${HH}z.gpsro.tm00.bufr_d gpsrobufr