Johannes Kepler Symposium für Mathematik

Im Rahmen des Johannes-Kepler-Symposiums für Mathematik wird Craig C. Douglas M.S. M.Phil. Ph.D., School of Energy Resources, Mathematics, and Computer Sciences, University of Wyoming, am Wed, May 15, 2002 um 17:00 Uhr im HS 10 einen öffentlichen Vortrag (mit anschließender Diskussion) zum Thema "Modeling and Computation of Sea Surface Heights in Complex Domains" halten, zu dem die Veranstalter des Symposiums,

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

hiermit herzlich einladen.

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).