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Authors: Pezzopane, M.*
Pignalberi, A.*
Pietrella, M.*
Title: On the solar cycle dependence of the amplitude modulation characterizing the mid-latitude sporadic E layer diurnal periodicity
Title of journal: Journal of atmospheric and solar-terrestrial physics
Series/Report no.: /137(2016)
Publisher: Elsevier Science Limited
Issue Date: Jan-2016
DOI: 10.1016/j.jastp.2015.11.010
Keywords: Sporadic E layer
Mid-latitude ionosphere
Tidal and Planetary wave
Nonlinear interaction
Abstract: Spectral analyses are employed to investigate how the diurnal periodicity of the critical frequency of the sporadic E (Es) layer varies with solar activity. The study is based on ionograms recorded at the ionospheric station of Rome (41.8°N, 12.5°E), Italy, from 1976 to 2009, a period of time covering three solar cycles. It was confirmed that the diurnal periodicity is always affected by an amplitude modulation with periods of several days, which is the proof that Es layers are affected indirectly by planetary waves through their non linear interaction with atmospheric tides at lower altitudes. The most striking features coming out from this study is however that this amplitude modulation is greater for high-solar activity than for low-solar activity.
Appears in Collections:05.07.01. Solar-terrestrial interaction
05.07.02. Space weather
01.02.02. Dynamics
01.02.99. General or miscellaneous
01.02.05. Wave propagation
01.02.04. Plasma Physics
01.02.06. Instruments and techniques
Papers Published / Papers in press

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