@Article{ShumePaulAbdu:2011:MoEqEl,
author = "Shume, Esayas Belay and Paula, Eurico Rodrigues de and Abdu,
Mangalathayil Ali",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)}",
title = "Modulation of equatorial electrojet plasma waves by overshielding
electric field during geomagnetic storms",
journal = "Journal of Applied Geophysics",
year = "2011",
volume = "116",
pages = "A08302",
month = "Aug",
keywords = "Equatorial electrojet, Plasma irregularities, S{\~a}o Luis, MA.",
abstract = "This brief report presents daytime 30 MHz radar observations of
equatorial electrojet plasma irregularities in S{\~a}o
Lu{\'{\i}}s, Brazil, during the 10 January 2002, 4 September
2002, and 6 November 2001 geomagnetic storms. Modulation of
equatorial electrojet plasma waves by the overshielding electric
field is detected by the radar during the January and September
storm events. The depressions of radar echo intensity observed by
the S{\~a}o Lu{\'{\i}}s radar during the 10 January and 4
September 2002 storms are caused by inhibition of large-, medium-,
and short-scale electrojet plasma waves by the overshielding
electric field. Corresponding to the depressions of the radar
echoes, counter equatorial electrojets were observed by
ground-based magnetometer in S{\~a}o Lu{\'{\i}}s. The
influences of disturbance dynamo, undershielding, and
overshielding electric fields on the equatorial electrojet
irregularities and current have been evident on the 6 November
2001 radar and magnetic field data. This study demonstrates the
control of the equatorial electrojet plasma waves (growth and
suppression) by the interplanetary magnetic field and also the
coupling between the high-latitude and equatorial ionospheres.",
doi = "10.1029/2010JA016353",
url = "http://dx.doi.org/10.1029/2010JA016353",
issn = "0926-9851",
language = "en",
urlaccessdate = "15 jun. 2024"
}