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Evidence of Meso-scale Structure in the High-latitude Thermosphere : Volume 19, Issue 1 (30/11/-0001)

By Aruliah, A. L.

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Book Id: WPLBN0004000866
Format Type: PDF Article :
File Size: Pages 10
Reproduction Date: 2015

Title: Evidence of Meso-scale Structure in the High-latitude Thermosphere : Volume 19, Issue 1 (30/11/-0001)  
Author: Aruliah, A. L.
Volume: Vol. 19, Issue 1
Language: English
Subject: Science, Annales, Geophysicae
Collections: Periodicals: Journal and Magazine Collection (Contemporary), Copernicus GmbH
Publication Date:
Publisher: Copernicus Gmbh, Göttingen, Germany
Member Page: Copernicus Publications


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Griffin, E., & Aruliah, A. L. (-0001). Evidence of Meso-scale Structure in the High-latitude Thermosphere : Volume 19, Issue 1 (30/11/-0001). Retrieved from

Description: Atmospheric Physics Laboratory, University College London, 67–73, Riding House Street, London W1P 7PP, England. There is a widely held assumption that the thermospheric neutral gas is slow to respond to magnetospheric forcing owing to its large inertia and therefore, may be treated as a steady state background medium for the more dynamic ionosphere. This is shown to be over simplistic. The data presented here compare direct measurements of the thermospheric neutral winds made in Northern Scandinavia by Fabry-Perot Interferometers (FPIs) with direct measurements of the ionosphere made by the EISCAT radar and with model simulations. These comparisons will show that the neutral atmosphere is capable of responding to ionospheric changes on mesoscale levels, i.e., spatial and temporal scale sizes of less than a few hundred kilometres and tens of minutes, respectively.

Key words. Atmospheric composition and structure (air-glow and aurora; instruments and techniques) – Ionosphere (ionosphere-atmosphere interactions)

Evidence of meso-scale structure in the high-latitude thermosphere


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