Running ADAS

ADAS assimilation run

Build model

First, choose a model tag to build. For this example, we choose GEOSadas-5_9_1_p7.

$ cvs co -P -r GEOSadas-5_9_1_p7 -d g591p8 GEOSadas-5_9

Not the module name GEOSadas-5_9. Unlike AGCM, all ADAS tags have a corresponding module.

$ cd g591p8/src
$ ./parallel_build.csh

Setup experiment (Run fvsetup)

Run fvsetup from the bin directory (g591p8/Linux/bin) with the following options (default value chosen for ones not mentioned): [we choose the default value for the initial conditions (FVICS) as well]

AGCM Resolution? [b72]
> C180

OGCM Resolution? [c34]
> f34

EXPID? [u000_C180]
> g591p8

OBSERVING SYSTEM CLASSES?
> "ncep_prep_bufr"

Do Aerosol Analysis (y/n)? [y]
> n

One can, of course, turn on Aerosol Analysis and AOD assimilation here.

A pdf of an example fvsetup session is provided here: fvsetup_session.

FVHOME

FVHOME is the home directory for fvDAS experiment. Resource files, restarts and system output will be stored under this directory. Usually it contains subdiretories:

ana/        first guess/analysis output
anasa/      job script to run stand-alone analysis
daotovs/    daotovs field output
diag/       diagnostic field output
etc/        listings and other odds & ends
fcst/       forecast run directory
fvInput/    process required inputs
obs/        post-analysis ODS files
prog/       prognostic field output
recycle/    latest restart files
rs/         restart files
run/        resource files

$FVHOME/.FVROOT gives the location of the installation bin directory.

Some of these directories are stored in the archive. After completing the experiment, look in $ARCHIVE/g591p8 (where g591p8 is the experiment ID).

Run directory

$ cd $FVHOME/run

Data Assimilation experiment

$ cd $FVHOME/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.