Running ADAS

DAS assimilation and forecast runs

Select DAS experiment to run

First, we choose a DAS run to simulate. For a list of runs

$ ls ~dao_ops

on NCCS discover. As an example, we choose the run d591_fpit (for more about GMAO products, please see https://gmao.gsfc.nasa.gov/products)

Look for ATAG in file ~dao_ops/d591_fpit/run/FVDAS_Run_Config

$ grep ATAG ~dao_ops/d591_fpit/run/FVDAS_Run_Config

 setenv ATAG    GEOSadas-5_9_1_p7
 setenv FVARCH   /archive/u/gmao_ops/GEOS-5.9.1/${ATAG}/ #include trailing colon

This gives us the tag and location of the restart files.

Build model

$ cvs co -P -r GEOSadas-5_9_1_p7 -d g591p7 GEOSadas-5_9
$ cd g591p7/src
$ ./parallel_build.csh

Setup experiment (Run `fvsetup`)

Run fvsetup from the bin directory (g591p7/Linux/bin) with the following options (default value is chosen for the ones not mentioned): [For now we choose the default value for FVICS as well]

AGCM Resolution? [b72]
> d72

EXPID? [u000_d72]
> g591p4_d72

OBSERVING SYSTEM CLASSES?
> "ncep_prep_bufr"

CHECKING OBSYSTEM? [2]
> 3

After saving these inputs, move to the experiment directory

$ cd $NOBACKUP/g591p4_d72/run

At this point, one can edit CAP.rc.tmpl to run 12-hour experiment. Also, one can turn on MAPL timers and memutils

JOB_SGMT:     0 120000
NUM_SGMT:     1

MAPL_ENABLE_TIMERS: YES
MAPL_ENABLE_MEMUTILS: YES

To run one segment each of GSIsa.x and GEOSgcm.x add 'exit' before 'PART IV - Next PBS Job Segment' in g5das.j.

Data Assimilation experiment

$ cd $NOBACKUP/g591p4_d72/run
$ qsub g5das.j

g5das creates a scratch directory $NOBACKUP/fvwork.xxxx and runs the experiment there. After the initial setup, GSIsa.x is run with output written to ana.log followed by GEOSgcm.x which writes its output to stdout and fvpsas.log.

Forecast experiment

Later.