Setting up the Run Script for GSI 4D hybrid analysis
Setting up the Run Script for GSI 4D hybrid analysis cindyhg Tue, 07/16/2019 - 10:59GSI 4D HYBRID FOR ARW USING GLOBAL ENSEMBLE FORECAST
Setting up the Run Script for GSI 4D hybrid analysis
Copy the sample run script
run_gsi_regional.ksh
from the practical case 3 (ARW 3DVAR with PrepBUFR) to a working directory and make the following modifications to run GSI 4D hybrid analysis:
- set the analysis time to
ANAL_TIME=2017051318
- Set the name/path for the analysis run directory to
WORK_ROOT=${run directory}
- Set the location of the ensemble files in the variable ENS_ROOT=...
- set the
BK_ROOT
to where you store the background files, WRF forecast at 3 time levels- set the path to the background file at the analysis time
BK_FILE=${BK_ROOT}/wrfout_d01_2018-08-12_18:00:00
- set to run 4D hybrid analysis
if_hybrid=Yes
if_4DEnVar=Yes
As can be seen in the sample run script, for
${if_4DEnVar} = Yes
, there are two additional background files at 1 hour before and after the analysis time, as specified in the variableBK_FILE_M1
andBK_FILE_P1
; there are also two additional sets of ensemble files before and after the analysis time, as specified in the variableENSEMBLE_FILE_mem_m1
andENSEMBLE_FILE_mem_p1
. Please make sure those variables setup right.An example of this run script is available from the link run_gsi_regional.ksh