@Article{AbreuMFVBJRCGAM:2017:IoFrOb,
author = "Abreu, A. J. de and Martin, I. M. and Fagundes, P. R. and
Venkatesh, K. and Batista, Inez Staciarini and Jesus, Rodolfo de
and Rockenback, Marlos and Coster, A. and Gende, M. and Alves, M.
A. and M., Wild.",
affiliation = "{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and
{Universidade do Vale do Para{\'{\i}}ba (UNIVAP)} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Massachusetts Institute of Technology
(MIT)} and {Universidad Nacional de La Plata (UNLP)} and
{Instituto Tecnol{\'o}gico de Aeron{\'a}utica (ITA)} and
{Rutherford Appleton Laboratory}",
title = "Ionospheric F-region observations over American sector during an
intense space weather event using multi-instruments",
journal = "Journal of Atmospheric and Solar-Terrestrial Physics",
year = "2017",
volume = "156",
pages = "1--14",
month = "Apr.",
keywords = "Geomagnetic storm, Ionosphere, Ionospheric irregularities, Space
weather.",
abstract = "The critical interaction between the magnetosphere and ionosphere
during intense geomagnetic storms continues to be important to
space weather studies. In this investigation, we present and
discuss the ionospheric F-region observations in the equatorial,
low- and mid-latitude regions in both hemispheres over American
sector during the intense geomagnetic storm on 0103 June 2013. The
geomagnetic storm reached a minimum Dst of \−119 nT at 0900
UT on 01 June. For this investigation, we present vertical total
electron content (VTEC) and phase fluctuations (in TECU/min) from
a chain of 10 GPS stations and the ionospheric parameters foF2 and
h\′F from a chain of 4 digital ionosonde stations, covering
from equatorial to mid-latitudes regions over American sector
during the entire storm-time period 31 May03 June 2013. In
addition, the plasma density observed from DMSP satellites is
presented. The results obtained show that during the sudden
impulse/SSC and throughout the main phase of the storm, a large
positive phase was observed in mid-latitudes of the northern
hemisphere, which could be due to changes in the thermospheric
wind circulation. On the other hand, in the mid-latitudes of the
southern hemisphere, no deviations are observed in VTEC and foF2
when compared to the quiet period. During the long recovery phase
of the storm on 0102 June, a north-south asymmetry is observed in
the F-region. The study confirms the dominant role of the
thermospheric winds on north-south asymmetry in the ionospheric
F-region. The ionospheric irregularities are found to be confined
in the equatorial region, of the bottomside spread-F type, before
and during the geomagnetic storm. It shows that the geomagnetic
storm did not affect the generation or suppression of ionospheric
irregularities at the stations investigated.",
doi = "10.1016/j.jastp.2017.02.009",
url = "http://dx.doi.org/10.1016/j.jastp.2017.02.009",
issn = "1364-6826",
language = "en",
targetfile = "abreu_ionospheric.pdf",
urlaccessdate = "05 maio 2024"
}