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Letter to the Editor: the Ionospheric Response During an Interval of Pc5 Ulf Wave Activity : Volume 18, Issue 2 (30/11/-0001)

By Lester, M.

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Book Id: WPLBN0004000703
Format Type: PDF Article :
File Size: Pages 5
Reproduction Date: 2015

Title: Letter to the Editor: the Ionospheric Response During an Interval of Pc5 Ulf Wave Activity : Volume 18, Issue 2 (30/11/-0001)  
Author: Lester, M.
Volume: Vol. 18, Issue 2
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection, Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

Citation

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Davies, J. A., Yeoman, T. K., & Lester, M. (-0001). Letter to the Editor: the Ionospheric Response During an Interval of Pc5 Ulf Wave Activity : Volume 18, Issue 2 (30/11/-0001). Retrieved from http://www.ebooklibrary.org/


Description
Description: Department of Physics and Astronomy, University of Leicester, Leicester, LE1 7RH, UK. A preliminary analysis of Pc5, ULF wave activity observed with the IMAGE magnetometer array and the EISCAT UHF radar in the post midnight sector indicates that such waves can be caused by the modulation of the ionospheric conductivity as well as the wave electric field. An observed Pc5 pulsation is divided into three separate intervals based upon the EISCAT data. In the first and third, the Pc5 waves are observed only in the measured electron density between 90 and 112 km and maxima in the electron density at these altitudes are attributed to pulsed precipitation of electrons with energies up to 40 keV which result in the height integrated Hall conductivity being pulsed between 10 and 50 S. In the second interval, the Pc5 wave is observed in the F-region ion temperature, electron density and electron temperature but not in the D and E region electron densities. The analysis suggests that the wave during this interval is a coupled Alfven and compressional mode.

Key words: Ionosphere (electric fields and currents) - Magnetospheric physics (magnetosphere-ionosphere interaction; MHD waves and instabilities)


Summary
Letter to the editor: The ionospheric response during an interval of Pc5 ULF wave activity


 

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