@Article{SantosAbSoSoBaDe:2016:StTiEq,
author = "Santos, Angela Machado dos and Abdu, Mangalathayil Ali and Souza,
Jonas Rodrigues de and Sobral, Jos{\'e} Humberto Andrade and
Batista, Inez Staciarini and Denardini, Clezio Marcos",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)}",
title = "Storm time equatorial plasma bubble zonal drift reversal due to
disturbance Hall electric field over the Brazilian region",
journal = "Journal of Geophysical Research: Space Physics",
year = "2016",
volume = "121",
number = "6",
pages = "5594--5612",
month = "June",
keywords = "electric field, equatorial plasma bubble, ionospheric
irregularities, ionospheric plasma drifts, magnetic storms,
particle precipitation.",
abstract = "The dynamics of equatorial ionospheric plasma bubbles over
Brazilian sector during two magnetic storm events are investigated
in this work. The observations were made at varying phases of
magnetic disturbances when the bubble zonal drift velocity was
found to reverse westward from its normally eastward velocity.
Calculation of the zonal drift based on a realistic low-latitude
ionosphere modeled by the Sheffield University
Plasmasphere-Ionosphere Model showed on a quantitative basis a
clear competition between vertical Hall electric field and
disturbance zonal winds on the variations observed in the zonal
velocity of the plasma bubble. The Hall electric field arising
from enhanced ratio of field line-integrated conductivities,
\ΣH/\ΣP, is most often generated by an increase in the
integrated Hall conductivity, arising from enhanced energetic
particle precipitation in the South American Magnetic Anomaly
region for which evidence is provided from observation of
anomalous sporadic E layers over Cachoeira Paulista and Fortaleza.
Such sporadic E layers are also by themselves evidence for the
development of the Hall electric field that modifies the zonal
drift.",
doi = "10.1002/2015JA022179",
url = "http://dx.doi.org/10.1002/2015JA022179",
issn = "2169-9402",
language = "en",
targetfile = "Santos et al_2016-JGR_Stormtime equatorial plasma bubble zonal
drift reversal.pdf",
urlaccessdate = "11 maio 2024"
}