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A Numerical Model of the Ionospheric Signatures of Time-varying Magnetic Reconnection: II. Measuring Expansions in the Ionospheric Flow Response : Volume 23, Issue 7 (14/10/2005)

By Morley, S. K.

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Book Id: WPLBN0003982969
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: A Numerical Model of the Ionospheric Signatures of Time-varying Magnetic Reconnection: II. Measuring Expansions in the Ionospheric Flow Response : Volume 23, Issue 7 (14/10/2005)  
Author: Morley, S. K.
Volume: Vol. 23, Issue 7
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
2005
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Lockwood, M., & Morley, S. K. (2005). A Numerical Model of the Ionospheric Signatures of Time-varying Magnetic Reconnection: II. Measuring Expansions in the Ionospheric Flow Response : Volume 23, Issue 7 (14/10/2005). Retrieved from http://members.worldlibrary.net/


Description
Description: School of Physics and Astronomy, University of Southampton, UK. A numerical model embodying the concepts of the Cowley-Lockwood (Cowley and Lockwood, 1992, 1997) paradigm has been used to produce a simple Cowley-Lockwood type expanding flow pattern and to calculate the resulting change in ion temperature. Cross-correlation, fixed threshold analysis and threshold relative to peak are used to determine the phase speed of the change in convection pattern, in response to a change in applied reconnection. Each of these methods fails to fully recover the expansion of the onset of the convection response that is inherent in the simulations. The results of this study indicate that any expansion of the convection pattern will be best observed in time-series data using a threshold which is a fixed fraction of the peak response. We show that these methods used to determine the expansion velocity can be used to discriminate between the two main models for the convection response to a change in reconnection.

Keywords. Magnetospheric physics (Magnetosphereionosphere interactions) – Ionosphere (Plasma convection; Modeling and forecasting)


Summary
A numerical model of the ionospheric signatures of time-varying magnetic reconnection: II. Measuring expansions in the ionospheric flow response

 

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