Ocean Modeling Discussion

Thank you for the info. Pity that I've switched to using shared-memory MPI for parallelism and that certainly is working....

Am having a puzzling problem running a very simple (2-D), idealized tidal simulation on an Ubuntu box with a 6-core/12-hyperthread Intel processor. After a restart, the timestep count and the time reported on the standart output line switch erratically between the through count/time and ones from ...

Forgot to mention that this problem has been resolved. It was indeed an IBM compiler issue and specifically the optimization flag (D'oh!) -O4. Downgrading to -O3 eliminated the problem.

I thank Bohyun Bahng for an alert spot on this. Mitsuhiro

Grid generation is definitely important to many of us working in regional applications, and is often the most time-consuming part of the model setup. I'm sure the ROMS community wants an effective curvilinear grid generator. We've come across "gridgen": http://www.marine.csiro.au/~sakov/ I haven't ...

Oh thanks! And sorry for a late reply, it's summer :wink: I was intrigued to hear that your results were dependent on domain partitioning. In our case, I tried several different domain decompositions, and results did not depend on them - the boundary value problem persisted no matter how I divided ...

Update - Thanks to David Darr, I had an opportunity to compile and run the setup on a Linux/Opteron cluster with a PGI compiler and LAM. The model ran without the problem mentioned. I'm suspecting this is an IBM compiler problem; next, I will try the Absoft Pro Fortran on our Apple cluster. If ...

I'm running ROMS 2.1 for an embayment with time-dependent river discharge (point sources) and external salinity. Time stamps for the discharge and b.c. data coincide (monthly). When I run this setup on a cluster with MPI, the river discharge gets correctly interpolated between the past and the ...