@Article{MoroDenResCheSch:2016:1.VaEa,
author = "Moro, Juliano and Denardini, Clezio Marcos and Resende, Laysa
Cristina Ara{\'u}jo and Chen, Sony Su and Schuch, Nelson Jorge",
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)}",
title = "Equatorial region electric fields at the dip equator: 1.
Variabilities in eastern Brazil and Peru",
journal = "Journal of Geophysical Research: Space Physics",
year = "2016",
volume = "121",
number = "10",
pages = "1--11",
abstract = "The equatorial electrojet (EEJ) is an intense eastward ionospheric
electric current centered at about 105 km of altitude along the
dip equator, set up by the global neutral wind dynamo that
generates the eastward zonal (Ey) and the daytime vertical (Ez)
electric fields. The temporal variation of the EEJ is believed to
be well understood. However, the longitudinal variability of the
Ey and Ez between 100 and 110 km is still quite scarce. Due to
their importance overall phenomenology of the equatorial
ionosphere, we investigate the variabilities of the Ey and Ez
inferred from measurements of the Doppler frequency of Type II
echoes provided by coherent backscatter radars installed in
locations close to the magnetic equator in the eastern Brazil
(2.33°S, 44.20°W) and Peru (11.95°S, 76.87°W). This study is based
on long-term (609 days for both systems) radar soundings collected
from 2001 to 2010. The variabilities of the electric fields are
studied in terms of the position of the soundings with respect to
the dip equator and the magnetic declination angle. Among the
results, Ey and Ez show longitudinal dependence, being higher in
Peru than east Brazil. Under quiet geomagnetic activity, the mean
diurnal variations of Ey ranged from 0.21 to 0.35 mV/m between 8
and 18 h (LT) in Brazil and from 0.23 mV/m to 0.45 mV/m in Peru,
while the mean diurnal variations of the Ez ranges from 7.09 to
8.80 mV/m in Brazil and from 9.00 to 11.18 mV/m in Peru.",
doi = "10.1002/2016JA022751",
url = "http://dx.doi.org/10.1002/2016JA022751",
issn = "2169-9402",
label = "lattes: 0549130828972280 5 MoroNarResCheSch:2016:1.VaEa",
language = "en",
urlaccessdate = "27 abr. 2024"
}