@Article{SousasantosKhSoAbMoOl:2019:NuSt3&,
author = "Sousasantos, Jonas and Kherani, Esfhan Alam and Sobral, Jos{\'e}
Humberto Andrade and Abdu, Mangalathayil Ali and Moraes, A. O. and
Oliveira, C. B. A.",
affiliation = "{Instituto Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Tecnol{\'o}gico da Aeron{\'a}utica (ITA)} and {Instituto de
Aeron{\'a}utica e Espa{\c{c}}o (IAE)} and {Instituto
Tecnol{\'o}gico da Aeron{\'a}utica (ITA)}",
title = "A numerical study on the 3\‐D Aaproach of the equatorial
plasma bubble seeded by the prereversal vertical drift",
journal = "Journal of Geophysical Research: Space Physics",
year = "2019",
volume = "124",
number = "6",
pages = "4539--4555",
month = "June",
abstract = "Numerical studies concerning equatorial plasma bubble (EPB)
seeding source mechanisms have been performed for the last
decades. Density perturbations, gravity waves, shear instabilities
among others were used in the literature. In all the cases the
prereversal vertical drift has a central role, being a necessary
condition in addition to all these seeding mechanisms.
Notwithstanding, since the prereversal vertical drift presents an
asymmetric distribution, this longitudinal variation was
hypothesized to act as a seeding source mechanism. This mechanism
is capable of providing both contributions: elevate the ionosphere
and seed the collisional interchange instability. Two-dimensional
investigation was already done, showing the validity of this
hypothesis in a bidimensional scenario. Nonetheless, the inclusion
of the parallel dynamics could alter the outcome of such analysis,
once the component of the conductivity along the geomagnetic field
direction causes a load effect reducing the growth rate and
shifting its altitude of maximization, thus a 3-D model was
developed, named MATPLAB_3D (Mathematical Plasma Bubble Model 3D),
and the hypothesis was tested. A progressive approach was
performed starting with an oversimplified configuration and
concluding with a more realistic profile of prereversal vertical
drift obtained using the SAMI2 model. The numerical simulations
revealed the existence of a quasi-gaussian seeding source. Also,
in case of a prereversal vertical drift varying within 20-60 m/s,
the seeded instability evolves into an EPB structure with a
longitudinal extension of similar to 2 degrees within similar to
22 min. This EPB maps to low latitude regions and presents
secondary structures in its west side. This result further
suggests that even though a decrease in the EPB growth due to the
inclusion of the parallel conductivity occurred, the hypothesis
remains valid.",
doi = "10.1029/2018JA026239",
url = "http://dx.doi.org/10.1029/2018JA026239",
issn = "2169-9380",
language = "en",
targetfile = "
Sousasantos_et_al-2019-Journal_of_Geophysical_Research__Space_Physics.pdf",
urlaccessdate = "12 maio 2024"
}