Title
Measurements of the dynamics and coupling of the equatorial thermosphere and the F-region ionosphere in Peru
Date Issued
01 January 1988
Access level
open access
Resource Type
journal article
Author(s)
Publisher(s)
Elsevier
Abstract
Simultaneous Fabry-Perot Interferometer (FPI) and Incoherent Scatter Radar (ISR) observations from Arequipa and Jicamarca, Peru, respectively, were obtained on 24 and 25 September 1986, during which there was substantial geomagnetic activity. Comparison of the neutral thermosphere's zonal velocity (measured by the FPI during twilight and night-time) and the F-region plasma's zonal drift (measured by the ISR throughout the day and night) indicate that at certain times, such as evening twilight, the two motions are not correlated, but that in the late night they are. The change from uncorrelated to correlated motion occurs as the ionospheric electron density decays, leading to a decreasing Pedersen conductivity which diminishes E-region shorting of the F-region dynamo, allowing the local thermospheric winds to control the F-region ionospheric drift. © 1988.
Start page
937
End page
942
Volume
50
Issue
November 10
Language
English
OCDE Knowledge area
Geología
Sensores remotos
Telecomunicaciones
Meteorología y ciencias atmosféricas
Scopus EID
2-s2.0-0038778543
Source
Journal of Atmospheric and Terrestrial Physics
ISSN of the container
00219169
Sponsor(s)
a similar behavior in comparisonso f diurnal vari- ations of neutral winds (determinedb y DE-2) and plasmad rifts (measuredb y the JicamarcaI SR) near solar maximum( 1981-1982). The changef rom uncorrelatedto correlatedm otion Acknowledgements-We thank the staff of the Jicamarca of the two media can be understoodo n the basis of Radar Observatory for the radar measurements and W. the following simplem odel (cf. RISHBETH1, 971a:) in the radar data. This material is based upon work supported SWARTZ and J. PINGKEE of Cornell University for processing the absenceo f the Earth’s magneticf ield (and electric by the National Science Foundation, Division of Atmo- fields)t hez onal drift of the F-region plasma,t hrough spheric Sciences, under Grants Nos. ATM-8502396 (Uni- ion-and electron-neutral collisions (‘ion drag’), versity of Pittsburgh), ATM-8740490 (University of Michi- would be thes amea st hato f then eutralt hermosphere. Observatory is a facility of the Instituto Geofisico de1P eru, gan) and ATM-8616456 (Utah State University). Jicamarca In the presenceo f the Earth’s magneticf ield,but with Ministry of Education and is operated with support from no couplingt o otherr egions,e .g.t heE -region,a near-the National Science Foundation.
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