@InProceedings{ConceiçãoSantosMRFABVC:2021:OcMoEx,
author = "Concei{\c{c}}{\~a}o Santos, F. and Muella, M. T. A. H. and
Resende, Laysa Cristina Ara{\'u}jo and Fagundes, P. R. and
Andrioli, Vania F{\'a}tima and Batista, Paulo Prado and Villat,
v. G. and Carrasco, A. J.",
affiliation = "{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and
{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Universidade do Vale
do Para{\'{\i}}ba (UNIVAP)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Universidade do Vale do Para{\'{\i}}ba (UNIVAP)}
and {Universidad de Los Andes}",
title = "Occurrence and modeling examination of sporadic-E layers in the
region of the South America (Atlantic) Magnetic Anomaly",
year = "2021",
organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e
Aeronomia, 8. (SBGEA)",
abstract = "In this work, the occurrence of different types of sporadic-E
layers (Es) was described for two stations located in the region
of the South America Magnetic Anomaly: Jata´\ı and Sao Jos´e
dos Campos. The results show the hourly and monthly values of the
Es occurrences and presented five types of layers (cusp, high,
flat, low, and slant), with the flat/low types (Esf/l) being the
most frequent over both stations. We also analyzed the Es layer
parameters of blanketing frequency (fbEs) and top frequency (ftEs)
obtained from ionosonde data during storm-time periods, in order
to investigate possible evidences of energetic particle-induced
E-layer ionization. The results revealed increases in the values
of the nighttime ftEs and fbEs, which can be related to the
particle precipitation in the South America Magnetic Anomaly
region. Additionally, we investigated the roles of the wind shear
mechanism in the formation of the Es types by using a modified
form of the Ionospheric ERegion Model (MIRE), which incorporates
tidal winds obtained from meteor radar data. Furthermore, the
electron densities deduced from fbEs parameter were compared with
the maximum electron densities obtained from MIRE simulations.
Depending on local time and season, the initial results revealed
for both stations some discrepancies between modeled and measured
electron densities. However, a better fitting was obtained when
the amplitudes of the zonal/meridional wind components were
adjusted by some factor, which may be attributed to the possible
effects of day-to-day tidal wind variability and their interaction
with gravity and planetary waves.",
conference-location = "Online",
conference-year = "22-26 mar.",
language = "en",
urlaccessdate = "05 jun. 2024"
}