Title: Load imbalance aspects in atmosphere simulations

Authors: Christian Koziar, Robert Reilein, Gudula Runger

Addresses: German National Weather Service (DWD), 63067 Offenbach, Germany. ' Department of Computer Science, Chemnitz University of Technology, 09107 Chemnitz, Germany. ' Department of Computer Science, Chemnitz University of Technology, 09107 Chemnitz, Germany

Abstract: Atmosphere simulation models often have a regular program structure based on a regular grid decomposition of the physical space and corresponding uniform computations. However, some atmosphere or weather situations show a more irregular behaviour with different intensities of activity in different physical regions. In this paper, we investigate how the regular program structure can be adapted to more irregular weather situations to reduce the amount of computations. We investigate meteorological criteria to guide the computations and discuss the influence of the program change on load imbalance, and parallelisation on distributed memory machines.

Keywords: atmosphere modelling; parallel simulation; load imbalances; parallel computing; irregularity; meteorological criteria; distributed memory; weather simulation.

DOI: 10.1504/IJCSE.2005.009705

International Journal of Computational Science and Engineering, 2005 Vol.1 No.2/3/4, pp.215 - 225

Available online: 05 May 2006 *

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