A statistical model of reversals in the geodynamo

A statistical model of reversals in the geodynamo

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I study a simple model of a turbulent dynamo. Using a combination of analytic solutions and scaling arguments I derive a set of governing equations that describe the evolution of the magnetic field. This simplified system predicts behaviour which is qualitatively similar to that seen in the Earth�...

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Main Author: Scullard, Christian R.
Format: Others
Language:English
Published: 2009
Online Access:http://hdl.handle.net/2429/15323
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spelling ndltd-UBC-oai-circle.library.ubc.ca-2429-153232018-01-05T17:37:47Z A statistical model of reversals in the geodynamo Scullard, Christian R. I study a simple model of a turbulent dynamo. Using a combination of analytic solutions and scaling arguments I derive a set of governing equations that describe the evolution of the magnetic field. This simplified system predicts behaviour which is qualitatively similar to that seen in the Earth's magnetic field and in numerical simulations. In particular, the model predicts multiple steady-field states, and that in certain cases the larger field states are more stable than their weaker counterparts. This provides a possible explanation for the observed periods of high stability in the geomagnetic field as well as for some of the observed behaviour in numerical simulations. Science, Faculty of Earth, Ocean and Atmospheric Sciences, Department of Graduate 2009-11-20T01:18:57Z 2009-11-20T01:18:57Z 2004 2004-05 Text Thesis/Dissertation http://hdl.handle.net/2429/15323 eng For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. 2533138 bytes application/pdf
collection NDLTD
language English
format Others
sources NDLTD
description I study a simple model of a turbulent dynamo. Using a combination of analytic solutions and scaling arguments I derive a set of governing equations that describe the evolution of the magnetic field. This simplified system predicts behaviour which is qualitatively similar to that seen in the Earth's magnetic field and in numerical simulations. In particular, the model predicts multiple steady-field states, and that in certain cases the larger field states are more stable than their weaker counterparts. This provides a possible explanation for the observed periods of high stability in the geomagnetic field as well as for some of the observed behaviour in numerical simulations. === Science, Faculty of === Earth, Ocean and Atmospheric Sciences, Department of === Graduate
author Scullard, Christian R.
spellingShingle Scullard, Christian R.
A statistical model of reversals in the geodynamo
author_facet Scullard, Christian R.
author_sort Scullard, Christian R.
title A statistical model of reversals in the geodynamo
title_short A statistical model of reversals in the geodynamo
title_full A statistical model of reversals in the geodynamo
title_fullStr A statistical model of reversals in the geodynamo
title_full_unstemmed A statistical model of reversals in the geodynamo
title_sort statistical model of reversals in the geodynamo
publishDate 2009
url http://hdl.handle.net/2429/15323
work_keys_str_mv AT scullardchristianr astatisticalmodelofreversalsinthegeodynamo
AT scullardchristianr statisticalmodelofreversalsinthegeodynamo
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