@InProceedings{BarrosSilvaTakWraFigCar:2018:ChEqPl,
author = "Barros Silva, Diego and Takahashi, Hisao and Wrasse, Cristiano Max
and Figueiredo, Cosme Alexandre Oliveira Barros and Carrasco,
Alexander J.",
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 {Universidad de Los Andes}",
title = "Characteristics of equatorial plasma bubbles observed by tec map
over south america and numerical simulation of its development",
year = "2018",
organization = "Cospar Scientific Assembly, 42.",
abstract = "Ground-based network of GNSS receivers have been used to monitor
Equatorial Plasma Bubbles (EPBs) by mapping the Total Electron
Content (TEC map). Large coverage of the TEC map allowed us to
monitor several EPBs simultaneously and get characteristics of the
dynamics, extension and longitudinal distributions of the EPBs
from the onset time until their disappearance. These
characteristics were obtained by using TEC map analysis and
keogram technique by using the data obtained during the period
between November/2012 and January/2016. The zonal drift velocities
of the EPBs showed a clear latitudinal gradient varying from 123
m/s at the equator to 65 m/s for 35°S of latitude. Consequently,
observed EPBs are inclined against the geomagnetic field lines.
Both zonal drift velocity and the inclination of the EPBs were
compared with the thermospheric neutral wind, which showed a good
agreement. Moreover, large coverage of TEC maps permit to study
periodic EPBs with a wide longitudinal distance. This averaged
values observed for the inter-bubbles distances also presented a
clear latitudinal gradient varying from 920 km at the equator to
640 km at 30°S. On several occasions, the distances reached more
than 2000 km. Inter-bubbles distances greater than 1000 km have
not been reported in literature. Numerical model calculations,
using different latitudinal gradients in zonal wind, showed a good
agreement with the latitudinal gradient in the EPBs zonal drift
observed by TEC map. Comparison of the observational results with
the theoretical model calculations confirms that the EPB
inclination against the geomagnetic field lines and the
latitudinal gradient of inter-bubbles distances were originated
due to a latitudinal gradient in the.",
conference-location = "Pasadena, California",
conference-year = "14-22 July",
language = "en",
urlaccessdate = "26 abr. 2024"
}