@InProceedings{AbduSanSouBatSob:2017:EqPlBu,
author = "Abdu, Manga{\c{c}}athayil Ali and Santos, A. M. and Souza, Jonas
Rodrigues de and Batista, Inez Staciarini and Sobral, Jos{\'e}
Humberto Andrade",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Equatorial plasma bubble development and dynamics, and sporadic E
layer structuring, under disturbance electric fields",
year = "2017",
organization = "International Congress of the Brazilian Geophysical Sociey, 15.",
keywords = "Low latitude ionosphere, Plasma bubbles, Penetration electric
fields, Sporadic E layers.",
abstract = "Disturbance electric field during space weather events can cause
severe modifications in the Equatorial and low - midlatitude
ionospheric plasma dynamics and related phenomenology. Penetration
electric fields, of undershielding or over-shielding types, and
disturbance dynamo electric field can cause anomalous development
of plasma bubbles even during their non-occurrence season, or can
lead to suppression of their normal development. These effects are
dependent on the local time and longitude of the observations.
Large changes in the Hall and Pedersen conductivities can occur
due to storm induced extra E layer ionization or modifications in
F layer plasma density, as a result of which the penetration
electric fields may produce, among other effects, (1) plasma
bubble zonal drift velocity reversal to westward, (2)
large/abnormal F layer plasma uplift, (3) sporadic E layer
disruption or its formation with instabilities. Beside these
effects, the equatorial ionization anomaly is known to suffer
latitudinal expansion and retraction. In this paper we will
discuss some outstanding response features of the low altitude
ionosphere under disturbance electric field as diagnosed by
Digisondes, radars and optical imagers in the South American
longitude sector, a region that is strongly influenced by the
South Atlantic Magnetic anomaly (SAMA). The results will be
compared and discussed with satellite observations (DMSP and
C/NOFS) and modeling results based on SUPIM simulation of a
realistic low latitude ionosphere.",
conference-location = "Rio de Janeiro, RJ",
conference-year = "31 jul. - 03 ago.",
language = "en",
targetfile = "abdu_equatorial.pdf",
urlaccessdate = "19 mar. 2024"
}