@InProceedings{BatistaBraSouFopBai:2018:MoLoLa,
author = "Batista, Inez Staciarini and Bravo, M. and Souza, Jonas Rodrigues
de and Foppiano, Alberto J. and Bailey, Graham",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Universidad de Santiago de Chile} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Universidad de Concepci{\'o}n}
and {Sheffield University}",
title = "Modelling the low latitude ionosphere during disturbed periods",
year = "2018",
organization = "Simp{\'o}sio Brasileiro de Geof{\'{\i}}sica Espacial e
Aeronomia, 7. (SBGEA)",
abstract = "Modeling the ionosphere during disturbed periods is one of the
most challenging tasks due to the complexity of the phenomena that
affect the electric fields and the thermosphere environment as a
whole. It is well known that depending on the direction of the
interplanetary magnetic field disturbance electric fields
(undershielding or overshielding) can penetrate from high to low
latitudes causing significant disturbances in the electron density
distribution and in the equatorial ionization anomaly (EIA)
development. Besides that, the large amount of energy deposited in
the polar region during disturbed periods will be responsible for
the generation of disturbed winds that will flow towards the
equator where they produce a disturbance dynamo which also affects
the EIA density distribution. The TIDs and TADs are also sources
of disturbances that propagate at high velocity reaching the
equator 2-3 hours after the beginning of the magnetic storm. In
this work we use the Sheffield University Plasmasphere-Ionosphere
Model at INPE (SUPIM-INPE), to simulate the drastic effects that
were observed at the low latitude ionosphere in the Brazilian
region during a very intense magnetic storm event. A few models
are tested for the disturbed electric field and for the disturbed
wind. The simulation results showed that the observations are
better explained when considering a transequatorial waveform
disturbance propagating from north to south at a velocity of the
order of 200 m/s.",
conference-location = "Santa Maria, RS",
conference-year = "05-09 nov",
language = "pt",
urlaccessdate = "04 jun. 2024"
}