em Física e Astronomia

Programa de

Doutorado e Mestrado

In�uence of tides and planetary

Dr. Michael PezzopaneIstituto Nazionale di Geo�sica e Vulcanologia (INGV), Rome, Italy

3947-1121 www.univap.brUniversidade do Vale do Paraíba

Informações:

AM

KT

waves on sporadic E layer

ABSTRAC

Tthis paper describes the in�uence that tides and planetary waves

have on sporadic E (Es) layer dynamics. The study is based on

ionograms recorded during the summertime of 2013, by the

Advanced Ionospheric Sounder by Istituto Nazionale di Geo�sica e

Vulcanologia (AIS-INGV) ionosondes installed at Rome (41.8°N,

12.5°E) and Gibilmanna (37.9°N, 14.0°E), Italy. We applied the

height-time-intensity (HTI) methodology proposed by Haldoupis

et al. (2006) to deeply investigate how tides control the Es

dynamics. An example of application of the HTI method by

considering ionograms recorded at Sao Jose dos Campos will be

also shown. Moreover, through the application of the wavelet

analysis it was also found that the tidal oscillations imprinted in Es

characteristics are affected by a strong amplitude modulation

with periods of several days. This amplitude modulation is a proof

that Es layers are indirectly affected by planetary waves through

their nonlinear interaction with tides at lower altitudes; this

nonlinear interaction produces the presence of secondary waves

with frequencies that are the sum and difference of the primary

waves frequencies involved in the interaction as proposed by

Teitelbaum and Vial (1991). This work adds to those that were

already done by Haldoupis et al. (2004, 2006), and con�rms that

ionosonde data, especially those registered in summertime, can

be used as a powerful tool for studying tidal and planetary waves

properties, as well as their climatology, in the mesosphere-low-

termosphere region.