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Large-scale Distributions of Ionospheric Horizontal and Field-aligned Currents Inferred from Eiscat : Volume 14, Issue 12 (30/11/-0001)

By Fontaine, D.

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Book Id: WPLBN0003975494
Format Type: PDF Article :
File Size: Pages 13
Reproduction Date: 2015

Title: Large-scale Distributions of Ionospheric Horizontal and Field-aligned Currents Inferred from Eiscat : Volume 14, Issue 12 (30/11/-0001)  
Author: Fontaine, D.
Volume: Vol. 14, Issue 12
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Historic
Publication Date:
-0001
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications

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Peymirat, C., & Fontaine, D. (-0001). Large-scale Distributions of Ionospheric Horizontal and Field-aligned Currents Inferred from Eiscat : Volume 14, Issue 12 (30/11/-0001). Retrieved from http://kindle.worldlibrary.net/


Description
Description: CETP-CNRS, Centre Universitaire, 10-12 Avenue de l'Europe, 78140 Vélizy, France. Statistical models for large-scale convection and for ionospheric conductances were previously derived from observations of the incoherent-scatter radar EISCAT. We complete this large-scale description with statistical models of the horizontal and field-aligned currents achieved from the same data base and for the same ranges of the magnetic activity index Kp. Except for the high-latitude dayside currents generally located poleward of the radar field of view, a large part of the whole current system can be probed with EISCAT. Globally consistent with previously published models, our results also exhibit some differences, such as the asymmetry in the local-time extension of the current sheets, concentrated to a few hours around 18 MLT in the evening sector, while widely spread from premidnight to prenoon magnetic local times on the morningside. This statistical description of the current system above EISCAT allowed us to examine several aspects of the large-scale auroral electrodynamics, namely the relationships between convection, conductances, and currents, in particular in the vicinity of the Harang discontinuity, and the features of the global current circuit.

Summary
Large-scale distributions of ionospheric horizontal and field-aligned currents inferred from EISCAT


 

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