Version 1 (modified by trac, 8 years ago) (diff)


ACCESS 1.0 and 1.3 AMIP testcases

The ACCESS 1.0 and 1.3 coupled and atmospheric (AMIP) configurations were used in the CAWCR submission to CMIP5. See for more information. The model configuration and forcing is described in several papers published in a special issue of the Australian Meteorological and Oceanographic Journal in 2013,

The ACCESS1.0 atmospheric configuration is very similar to HadGEM2 as used in the Met Office CMIP5 simulations. ACCESS1.3 is based on a HadGEM3 configuration and also includes the CABLE land surface scheme. For full details on the model configurations see Bi et al ( and Kowalczyk et al ( For details on the model forcing see Dix et al (

Note that the ACCESS land-sea mask and orography is different to both HadGEM2 and HadGEM3. See LandMask and HighResolutionAustralianOrography for details.

The jobs described here were originally developed and run on vayu but have been modified to run on raijin. Compiler differences mean that the original results will not be reproduced exactly with a new executable, but the original vayu executables can still be run on raijin.


Build job saaca uses the UM vn 7.3 trunk + branch Note that the job builds a coupled model executable that can also be run in AMIP mode. The hand edit


sets the appropriate preprocessor directives and the compiler overrides


set the appropriate compiler options.

The build uses the standard system modules

 module load intel-cc/
 module load intel-fc/
 module load openmpi/1.6.5
 module load netcdf/

and the access modules (from ~access/modules)

 module load fcm/2.3.1
 module load gcom/4.4
 module load dummygrib
 module load oasis3

The executable will be /short/$PROJECT/$USER/UM_ROUTDIR/$USER/saaca/ummodel/hg2r11_access.exe.

Run job is saacm. Note that these jobs are owned by mrd599. To run this job you will need to change the path to the executables to use the name of your build job (presently set to saaca).


Build job saadb uses the 7.3 trunk + branch As with the 1.0 build, this job also builds a coupled model executable.

The run job is saada.

Job saads builds a single column version of the ACCESS 1.3 model. See access/SCM_testcases


This configuration is HadGEM2 + CABLE. It was not submitted to CMIP5, but used for isolating the effect of CABLE from the other changes in the 1.3 configuration.

Original CMIP5 executables used by CAWCR

The original CMIP5 executables used on vayu were built with intel-fc/11.1.046 and OpenMPI/1.4.3. Although that compiler version is not available on raijin, the compiler libraries were statically linked so the executables still run and produce results identical to the original vayu simulations (note that in general this reproducibility depends on the compiler options used - see wiki:access/ACCESS1.0_reproducibility).

The original ACCESS 1.0 executable was /short/p73/har599/UM_ROUTDIR/har599/xajbf/ummodel/bin/xajbf_new.exe_07Nov11. Copied to directory ~/access/data/AccessModelExperimentLibrary/access1.0/bin.

ACCESS1.0 run job was xajba (in the UMUI DB on cherax). This was copied to accesscollab as sabma and modified to run on raijin as sabme. Note that this has been converted to UMUI vn7.3.1 to support the extra precision in the GHG values.

The original ACCESS 1.3 executable was /short/p66/hxy599/ACCESS/bin/um_hg3.exe-CABLE-amip, copied to ~access/data/AccessModelExperimentLibrary/access1.3/bin.

ACCESS1.3 run job was uaakq (cherax), copied to sabmc and modified as sabmf.

Note that these jobs are owned by access and should appear in your list when the UMUI is started.

The standard ACCESS1.0 experiment started at 1979-01-01 from a restart file from an earlier AMIP experiment. The ACCESS1.3 simulation started at 1978-01-01 from the same initial file as used for the coupled model simulations. This had a year spin-up before the CMIP5 data was saved.

Comparing to original experiments

Post-processed data from the AMIP runs is available via the Earth System Grid. Raw model output is available on raijin

  • 1.0 AMIP run /g/data/p66/ACCESSDIR/AMIP/hg2_MOSES/xajba/atm (with dump files in /g/data/p66/ACCESSDIR/har599/ACCESS/output/xajba)
  • 1.3 AMIP run /g/data/p66/ACCESSDIR/AMIP/hg3_CABLE/uaakq/atm

For convenience the monthly mean surface air temperature (tas), sea level pressure (psl) and precipitation (pr) post-processed CMIP5 output files are in ~access/data/AccessModelExperimentLibrary/access1.0/std_output (and similarly for 1.3).

Note on STASH output

Met Office configurations typically use a 360 day calendar. Using the regular calendar makes the calculation of climate means within the model run considerably more expensive. To work around this we have a locally developed modification to calculate the monthly means. This was used in all the CMIP5 runs (AMIP and coupled) and the code branch is included in both jobs here. See GregorianClimateMeans for details

Run times

The runs job are all set to run in 3 month chunks. After the first 3 month chunk is complete, enable the hand-edit ~access/umui_jobs/hand_edits/common/crun.ed, process and resubmit. The job should then continue to resubmit automatically until complete.

A 3 month run requires about 3500 s walltime on 64 processors on raijin.


accessdev is intended to replace accesscollab as the front end machine sometime in 2014.

Following experiments all owned by mrd599.

access 1.0 build and run jobs are vabva and vabvm respectively. These are identical to the versions on accesscollab (saaca and saacm described above).

For access 1.3, vacta, vactb and vacts are the equivalents of the accesscollab saada, saadb and saads.