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Cluster Edi Convection Measurements Across the High-latitude Plasma Sheet Boundary at Midnight : Volume 19, Issue 10/12 (30/11/-0001)

By Quinn, J. M.

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Book Id: WPLBN0004000840
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Cluster Edi Convection Measurements Across the High-latitude Plasma Sheet Boundary at Midnight : Volume 19, Issue 10/12 (30/11/-0001)  
Author: Quinn, J. M.
Volume: Vol. 19, Issue 10/12
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

APA MLA Chicago

Kerr, S. S., Baumjohann, W., Mcilwain, C. E., Vaith, H., Whipple, E. C., Quinn, J. M.,...Bauer, T. M. (-0001). Cluster Edi Convection Measurements Across the High-latitude Plasma Sheet Boundary at Midnight : Volume 19, Issue 10/12 (30/11/-0001). Retrieved from http://netlibrary.net/


Description
Description: Space Science Center, Morse Hall University of New Hampshire Durham, NH 03824, USA. We examine two crossings of three Cluster satellites from the polar cap into the high-latitude plasma sheet at midnight local time, using data from the Electron Drift Instrument (EDI). EDI measures the full electron drift velocity in the plane perpendicular to the magnetic field for any field and drift directions. The context of the measured convection velocities is established by their relation to the intense enhancements in 1 keV electrons, also measured by EDI, as the satellites move from the polar cap into the plasma sheet boundary. In both cases presented here, the cross B convection in the polar cap is anti-sunward (toward the nightside plasma sheet) with a small duskward component. As the satellites enter the plasma sheet boundary region, the dawn-dusk convective flow component reverses its sign, and the flow in the meridianal plane (toward the center of the plasma sheet) drops substantially. The relatively stable convection in the polar cap becomes highly variable as the PSBL is encountered. The timing and sequence of the boundary crossings by the Cluster satellites are consistent with a relatively static structure on a time scale of the few minutes in satellite separations. In one of the two events, the plasma sheet boundary has a spatially separate structure that is crossed by the satellites before entering the plasma sheet.

Key words. Magnetospheric physics (electric fields; magnetopause, cusp and boundary layers; instruments and techniques)


Summary
Cluster EDI convection measurements across the high-latitude plasma sheet boundary at midnight

 

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