A study of ionospheric absorption events at very high latitudes

International audience Riometer recordings at Dumont d'Urville station (Antarctica) show very often absorption events characterized by an irregular and slowly varying absorption of about 0.2 to 1 dB.Analysis of these data and of simultaneous ionograms allows the separation of these events into...

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Bibliographic Details
Published in:Journal of Atmospheric and Terrestrial Physics
Main Authors: Vassal, J., Berthelier, Jean-Jacques, Lavergnat, J., Sylvain, M.
Other Authors: Laboratoire de Géophysique Externe, Centre National de la Recherche Scientifique (CNRS)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 1976
Subjects:
[PHYS.PHYS.PHYS-AO-PH]Physics [physics]/Physics [physics]/Atmospheric and Oceanic Physics [physics.ao-ph]
Dumont d'Urville
Dumont d'Urville Station
Dumont-d'Urville
Antarc*
Antarctica
Online Access:https://hal.archives-ouvertes.fr/hal-03225718
https://doi.org/10.1016/0021-9169(76)90137-9
Description
Summary:International audience Riometer recordings at Dumont d'Urville station (Antarctica) show very often absorption events characterized by an irregular and slowly varying absorption of about 0.2 to 1 dB.Analysis of these data and of simultaneous ionograms allows the separation of these events into three homogenous populations, one of which is associated with F-lacuna, i.e. the disappearance on the ionograms of all or part of echoes from the F-region.This paper describes the method of separation of these populations and describe the properties of occurrence of each of them.

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