Calculation of normal mode spectra in laterally heterogeneous earth models using an iterative direct solution method,

Al‐Attar, David and Woodhouse, John H and Deuss, Arwen (2012) Calculation of normal mode spectra in laterally heterogeneous earth models using an iterative direct solution method,. Geophysical Journal International, 189, (2). pp. 1038-1046. ISSN 1365-246X DOI 10.1111/j.1365-246X.2012.05406.x

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Official URL: http://gji.oxfordjournals.org/content/189/2/1038

Abstract

Normal mode observations play an important role in studying broad-scale lateral variations in the Earth. Such studies require the calculation of accurate synthetic spectra in realistic earth models, and this remains a computationally challenging problem. Here, we describe a new implementation of the direct solution method for calculating normal mode spectra in laterally heterogeneous earth models. In this iterative direct solution method, the mode-coupling equations are solved in the frequency-domain using the preconditioned biconjugate gradient algorithm, and the time-domain solution is recovered using a numerical inverse Fourier transform. A number of example calculations are presented to demonstrate the accuracy and efficiency of the method for performing large ‘full coupling’ calculations as compared to methods based on matrix diagonalization and the traditional direct solution method.

Item Type: Article
Additional Information: This article has been accepted for publication in Geophysical Journal International ©: 2012 David Al-Attar, John H. Woodhouse, and Arwen Deuss Published by Oxford University Press on behalf of The Royal Astronomical Society. All rights reserved.
Uncontrolled Keywords: 2012AREP; IA63;
Subjects: 02 - Geodynamics, Geophysics and Tectonics
Divisions: 02 - Geodynamics, Geophysics and Tectonics
Journal or Publication Title: Geophysical Journal International
Volume: 189,
Page Range: pp. 1038-1046
Identification Number: 10.1111/j.1365-246X.2012.05406.x
Depositing User: Sarah Humbert
Date Deposited: 20 Apr 2012 17:22
Last Modified: 23 Jul 2013 10:04
URI: http://eprints.esc.cam.ac.uk/id/eprint/2473

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