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Title: A new aspect of magnetic declination control of equatorial spread F and F region dynamo

Abstract

Low-latitude range spread F (RSF) data were collected over 12 yr to study seasonal variation of the RSF data. The analysis emphasizes the appearance of two secondary minima that correspond with the appearance of a pair of nodes at the magnetically conjugate E-layer sunset local times. A model for the minima is developed describing asymmetric conjugate E-layer decay conditions and simple development of the F-region dynamo. Magnetic declination angle is shown to play a significant role in spread F plasma-bubble development caused by seasonal qualities of the evening F-region dynamo electric field. The seasonal variations in vertical drift and RFS, however, are not identical as predicted by theory. The observations and derived correlations suggest that the conditions of spread F onset include F-region vertical drift and height gradient. 39 refs.

Authors:
; ;  [1]
  1. INPE, Sao Jose dos Campos (Brazil)
Publication Date:
OSTI Identifier:
6891276
Resource Type:
Journal Article
Journal Name:
Journal of Geophysical Research; (United States)
Additional Journal Information:
Journal Volume: 97; Journal ID: ISSN 0148-0227
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; E REGION; SEASONAL VARIATIONS; F REGION; GEOMAGNETIC EQUATOR; GEOMAGNETIC FIELD; PLASMA; SOLAR CYCLE; SPREAD F; EARTH ATMOSPHERE; IONOSPHERE; MAGNETIC FIELDS; PLANETARY IONOSPHERES; VARIATIONS; 661320* - Auroral, Ionospheric, & Magnetospheric Phenomena- (1992-)

Citation Formats

Abdu, M A, Batista, I S, and Sobral, J H.A. A new aspect of magnetic declination control of equatorial spread F and F region dynamo. United States: N. p., 1992. Web. doi:10.1029/92JA00826.
Abdu, M A, Batista, I S, & Sobral, J H.A. A new aspect of magnetic declination control of equatorial spread F and F region dynamo. United States. https://doi.org/10.1029/92JA00826
Abdu, M A, Batista, I S, and Sobral, J H.A. 1992. "A new aspect of magnetic declination control of equatorial spread F and F region dynamo". United States. https://doi.org/10.1029/92JA00826.
@article{osti_6891276,
title = {A new aspect of magnetic declination control of equatorial spread F and F region dynamo},
author = {Abdu, M A and Batista, I S and Sobral, J H.A.},
abstractNote = {Low-latitude range spread F (RSF) data were collected over 12 yr to study seasonal variation of the RSF data. The analysis emphasizes the appearance of two secondary minima that correspond with the appearance of a pair of nodes at the magnetically conjugate E-layer sunset local times. A model for the minima is developed describing asymmetric conjugate E-layer decay conditions and simple development of the F-region dynamo. Magnetic declination angle is shown to play a significant role in spread F plasma-bubble development caused by seasonal qualities of the evening F-region dynamo electric field. The seasonal variations in vertical drift and RFS, however, are not identical as predicted by theory. The observations and derived correlations suggest that the conditions of spread F onset include F-region vertical drift and height gradient. 39 refs.},
doi = {10.1029/92JA00826},
url = {https://www.osti.gov/biblio/6891276}, journal = {Journal of Geophysical Research; (United States)},
issn = {0148-0227},
number = ,
volume = 97,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 1992},
month = {Thu Oct 01 00:00:00 EDT 1992}
}