Setting up the Run Script for GSI hybrid analysis

GSI 3D HYBRID FOR ARW USING GLOBAL ENSEMBLE FORECAST

Setting up the Run Script for GSI 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 hybrid analysis:

• 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 to run GSI hybrid analysis: if_hybrid=Yes
• Set not to run GSI 4D hybrid analysis: if_4DEnVar=No

Please note that the sample script provides links to the GFS ensemble data for this tutorial case only. If you are running your own GSI hybrid case with a different date, please make any necessary modifications to specify the variable ENS_ROOT and ENSEMBLE_FILE_mem in the run script.