The Mathematical Institute, University of Oxford, Eprints Archive

Reduced-order models of the Martian atmospheric dynamics

Martinez-Alvarado, O. and Moroz, I. M. and Read, P. L. and Lewis, S. R. (2005) Reduced-order models of the Martian atmospheric dynamics. In: Fifth EUROMECH Nonlinear Dynamics Conference, 7-12 August 2005, Eindhoven, The Netherlands.

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Abstract

In this paper we explore the possibility of deriving low-dimensional models of the dynamics of the Martian atmosphere. The analysis consists of a Proper Orthogonal Decomposition (POD) of the atmospheric streamfunction after first decomposing the vertical structure with a set of eigenmodes. The vertical modes were obtained from the quasi-geostrophic vertical structure equation. The empirical orthogonal functions (EOFs) were optimized to represent the atmospheric total energy. The total energy was used as the criterion to retain those modes with large energy content and discard the rest. The principal components (PCs) were analysed by means of Fourier analysis, so that the dominant frequencies could be identified. It was possible to observe the strong influence of the diurnal cycle and to identify the motion and vacillation of baroclinic waves.

Item Type:Conference or Workshop Item (Paper)
Subjects:D - G > Geophysics
D - G > Fluid mechanics
Research Groups:Oxford Centre for Industrial and Applied Mathematics
ID Code:202
Deposited By:Irene Moroz
Deposited On:21 Sep 2005
Last Modified:20 Jul 2009 14:19

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