The Open UniversitySkip to content
 

Low-order dynamical behavior in the martian atmosphere: Diagnosis of general circulation model results

Martínez-Alvarado, Oscar; Moroz, Irene M.; Read, Peter L.; Lewis, Stephen R. and Montabone, Luca (2009). Low-order dynamical behavior in the martian atmosphere: Diagnosis of general circulation model results. Icarus, 204(1) pp. 48–62.

Full text available as:
[img]
Preview
PDF (Accepted Manuscript) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (803Kb)
DOI (Digital Object Identifier) Link: http://dx.doi.org/10.1016/j.icarus.2009.06.010
Google Scholar: Look up in Google Scholar

Abstract

The hypothesis of a low dimensional martian climate attractor is investigated by the application of the proper orthogonal decomposition (POD) to a simulation of martian atmospheric circulation using the UK Mars general circulation model (UK-MGCM). In this article we focus on a time series of the interval between autumn and winter in the northern hemisphere, when baroclinic activity is intense. The POD is a statistical technique that allows the attribution of total energy (TE) to particular structures embedded in the UK-MGCM time-evolving circulation. These structures are called empirical orthogonal functions (EOFs). Ordering the EOFs according to their associated energy content, we were able to determine the necessary number to account for a chosen amount of atmospheric TE. We show that for Mars a large fraction of TE is explained by just a few EOFs (with 90% TE in 23 EOFs), which apparently support the initial hypothesis. We also show that the resulting EOFs represent classical types of atmospheric motion, such as thermal tides and transient waves. Thus, POD is shown to be an efficient method for the identification of different classes of atmospheric modes. It also provides insight into the non-linear interaction of these modes.

Item Type: Journal Article
Copyright Holders: 2009 Elsevier Inc.
ISSN: 0019-1035
Keywords: Mars; atmospheres, dynamics; data reduction techniques;
Academic Unit/Department: Science > Physical Sciences
?? scie-phya ??
Interdisciplinary Research Centre: Centre for Earth, Planetary, Space and Astronomical Research (CEPSAR)
Item ID: 17944
Depositing User: Colin Smith
Date Deposited: 20 Aug 2009 12:45
Last Modified: 19 Nov 2012 21:25
URI: http://oro.open.ac.uk/id/eprint/17944
Share this page:

Actions (login may be required)

View Item
Report issue / request change

Policies | Disclaimer

© The Open University   + 44 (0)870 333 4340   general-enquiries@open.ac.uk