Version: 8.1, global ocean on 2 and 4 degree grids
This version has been tested on an SGI O2 workstation, an SGI Challenge computer, a DEC Alpha, a Fujitsu VP700, a Cray C90, and a SUN SunFire 388.
Download
You can download a 67 Mb gzipped tar file containing the source code
of OPA, the manual, two sets of data files and several postprocessing
scripts from here:
opa-global.tar.gz.
Note that you need the NetCDF library in order to compile the OPA executable. If it is not installed on your computer, you can download the NetCDF source distribution from UNIDATA. If you have any problem installing this library, you can contact me at the e-mail address that you can find at the end of this page.
Installation
Instructions on how to install, configure,
and compile the OPA 8.1 model are also included in the package.
Running
You can perform a demo run of OPA by typing the command
'make run'. The following table provides some data
about memory usage and computing time for this demo run using OPA
in a monotasking configuration and the 4 degree grid on several
computers. (The UNIX time and top utilities were
used for this on SGI and DEC, and the NQS batch system statistics
on Fujitsu and Cray.)
| Computer System | Size (Mb) | Reserved (Mb) | Real (s) | User (s) | System (s) |
|---|---|---|---|---|---|
| SGI Challenge | 161 | 153 | 1995 | 1952 | 6.3 |
| SGI Challenge (4 proc. MPI) | 1400 | 47 | 515 | 2016 | 8.8 |
| DEC Alpha | 348 | 161 | 3753 | 1302 | 22.3 |
| Cray C90 | 370 | - | 187 | 167 | 2.3 |
| Fujitsu VPP700 | 184 | - | 420 | 326 | 6.0 |
| Fujitsu VPP700 (2 proc. MPI) | 296 | - | 400 | 451 | 12.6 |
Support
At this moment, the global ocean version of OPA is supported at the
S1 level (see also
the page on support levels).
The OPA ocean model was developed at
LODYC.
You can also download a PDF version of the OPA8.1 manual from
their website.
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