Removal of Content Advisory - April 2024

Advisory to Gridpoint Statistical Interpolation (GSI) users: As of the beginning of April 2024, all support assets for Gridpoint Statistical Interpolation (GSI) will be removed from the DTC website. Users should download all reference materials of interest prior to April 2024.

Community GSIV3.7 Online Tutorial | Case 2: Single observation test with NAM BE > Setting up the Run Script

ARW SINGLE OBSERVATION TEST W/ NAM BE

Setting up the Run Script

For this exercise, make a copy of the prepared basic run script: 
cp run_gsi_regional.ksh_basic run_gsi_regional.ksh_psot

Make the following additional modifications to the script run_gsi_regional.ksh_psot:

  • Set the name/path for the analysis run directory
  • Set up the one observation test option to true
  • if_oneob=Yes
  • Select the background field format
  • bk_core=ARW
  • Select the NAM background error covariance
  • bkcv_option=NAM

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

Check the GSI namelist

Users can check the namelist to see how to set up a single observation test. The related namelist options include :

  • oneobtest=.true.
  • Set the location of the pseudo observation: &SINGLEOB_TEST
    maginnov=1.0,magoberr=0.8,oneob_type='t',
    oblat=38.,oblon=279.,obpres=500.,obdattim=${ANAL_TIME},
    obhourset=0.,
    /

An example namelist is available here.