Johannes Kepler Symposium on Mathematics

As part of the Johannes Kepler symposium on mathematics Craig C. Douglas M.S. M.Phil. Ph.D., School of Energy Resources, Mathematics, and Computer Sciences, University of Wyoming, will give a public talk (followed by a discussion) on Wed, May 15, 2002 at 17:00 o'clock at HS 10 on the topic of "Modeling and Computation of Sea Surface Heights in Complex Domains" . The organziers of the symposium,

O.Univ.-Prof. Dr. Ulrich Langer,
Univ.-Prof. Dr. Gerhard Larcher
A.Univ.-Prof. Dr. Jürgen Maaß, and
die ÖMG (Österreichische Mathematische Gesellschaft),

hereby cordially invite you.

Series A - General Colloquium:

The intention is to present general information not only to experts, but also to students and guests from outside the mathematical institutes.

Modeling and Computation of Sea Surface Heights in Complex Domains

A mathematical model and computational results are presented for wind driven ocean modeling based on the isopycnal version of the Spectral Ocean Element Method. The method is robust, accurate over a many year simulation, and scales extremely well on a wide variety of parallel computers including traditional supercomputers and clusters.

SEOM features advanced algorithms, based on h-p type finite element methods, allowing accurate representation of complex coastline and oceanic bathymetry, variable lateral resolution, and high order solution of the three dimensional oceanic equations of motion.

An additive Schwarz preconditioner reduces the expected run time by roughly a factor of three, independent of the number of processors. Cache aware techniques also are quite effective in a filtering procedure that occurs frequently.

This is joint work with Gundolf Haase (Linz) and Mohamed Iskandarani (Miami).