@Article{ArrudaSAACTMB:2006:ThExZo,
author = "Arruda, Daniela Cristina Santana and Sobral, Jos\é and
Andrade, Humberto and Abdu, Mangalathayil Ali and Castilho, Vivian
Moreira and Takahashi, Hisao and Medeiros, A. F. and Buriti, R.
A.",
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 {bUniversidade Federal de Campina Grande (UFCG)} and
{bUniversidade Federal de Campina Grande (UFCG)}",
title = "Theoretical and experimental zonal drift velocities of the
ionospheric plasma bubbles over the Brazilian region",
journal = "Advances in Space Research",
year = "2006",
volume = "38",
number = "11",
pages = "2610--2614",
keywords = "Ionospheric bubbles, OI630 nm airglow, Zonal plasma drifts,
Equatorial ionosphere.",
abstract = "This work presents equatorial ionospheric plasma bubble zonal
drift velocity observations and their comparison with model
calculations. The bubble zonal velocities were measured using
airglow OI630 nm all-sky digital images and the model calculations
were performed taking into account flux-tube integrated Pedersen
conductivity and conductivity weighted neutral zonal winds. The
digital images were obtained from an all-sky imaging system
operated over the low-latitude station Cachoeira Paulista (Geogr.
22.5S, 45W, dip angle 31.5S) during the period from October 1998
to August 2000. Out of the 138 nights of imager observation, 29
nights with the presence of plasma bubbles are used in this study.
These 29 nights correspond to geomagnetically rather quiet days
(KP < 24+) and were grouped according to season. During the early
night hours, the calculated zonal drift velocities were found to
be larger than the experimental values. The best matching between
the calculated and observed zonal velocities were seen to be for a
few hours around midnight. The model calculation showed two humps
around 20 LT and 24 LT that were not present in the data. Average
decelerations obtained from linear regression between 20 LT and 24
LT were found to be: (a) Spring 1998, \−8.61 ms\−1
h\−1; (b) Summer 1999, \−0.59 ms\−1
h\−1; (c) Spring 1999, \−11.72 ms\−1
h\−1; and (d) Summer 2000, \−8.59 ms\−1
h\−1. Notice that Summer and Winter here correspond to
southern hemisphere Summer and Winter, not northern hemisphere.",
copyholder = "SID/SCD",
issn = "0273-1177",
language = "en",
targetfile = "Theoretical and experimental zonal drift.pdf",
urlaccessdate = "06 maio 2024"
}