@InProceedings{BarrosTaWrFiCaIn:2018:ChEqPl,
author = "Barros, D. and Takahashi, Hisao and Wrasse, Cristiano Max and
Figueiredo, Cosme Alexandre Oliveira Barros and Carrasco, A. J.
and Inoue J{\'u}nior, Marcos Hideki",
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 ULA and {Instituto Nacional de Pesquisas
Espaciais (INPE)}",
title = "Characteristics of Equatorial Plasma bubbles observed by TEC map
over South America and numerical simulation of its development",
year = "2018",
organization = "Latin American Conference on Space Geophysics, 11. (COLAGE)",
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 EPBs zonal drift.",
conference-location = "Buenos Aires, Argentina",
conference-year = "16-20 abr.",
language = "en",
urlaccessdate = "12 maio 2024"
}