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Eiscat/Crres Observations: Nightside Ionospheric Ion Outflow and Oxygen-rich Substorm Injections : Volume 14, Issue 10 (30/11/-0001)

By Gazey, N. G. J.

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Book Id: WPLBN0003975919
Format Type: PDF Article :
File Size: Pages 12
Reproduction Date: 2015

Title: Eiscat/Crres Observations: Nightside Ionospheric Ion Outflow and Oxygen-rich Substorm Injections : Volume 14, Issue 10 (30/11/-0001)  
Author: Gazey, N. G. J.
Volume: Vol. 14, Issue 10
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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Perry, C. H., Coles, S., Grande, M., Opgenoorth, H., Aylward, A. D., Wilken, B.,...Smith, P. N. (-0001). Eiscat/Crres Observations: Nightside Ionospheric Ion Outflow and Oxygen-rich Substorm Injections : Volume 14, Issue 10 (30/11/-0001). Retrieved from http://www.ebooklibrary.org/


Description
Description: Rutherford Appleton Laboratory, Chilton, Oxfordshire, OX11 0QX, UK. We present combined observations made near midnight by the EISCAT radar, all-sky cameras and the combined released and radiation efects satellite (CRRES) shortly before and during a substorm. In particular, we study a discrete, equatorward-drifting auroral arc, seen several degrees poleward of the onset region. The arc passes through the field-aligned beam of the EISCAT radar and is seen to be associated with a considerable upflow of ionospheric plasma. During the substorm, the CRRES satellite observed two major injections, 17 min apart, the second of which was dominated by O+ ions. We show that the observed arc was in a suitable location in both latitude and MLT to have fed O+ ions into the second injection and that the upward flux of ions associated with it was sufficient to explain the observed injection. We interpret these data as showing that arcs in the nightside plasma-sheet boundary layer could be the source of O+ ions energised by a dipolarisation of the mid- and near-Earth tail, as opposed to ions ejected from the dayside ionosphere in the cleft ion fountain.

Summary
EISCAT/CRRES observations: nightside ionospheric ion outflow and oxygen-rich substorm injections

 

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