@Article{AlvesSJSMBAKMMDBRDMVBSGBWA:2017:RoSoWi,
author = "Alves, Livia Ribeiro and Souza, V. M. and Jauer, Paulo Ricardo and
Silva, Ligia Alves da and Medeiros, Cl{\'a}udia and Braga, Carlos
Roberto and Alves, Maria Virginia and Koga, Daiki and Marchezi,
Jos{\'e} Paulo and Mendon{\c{c}}a, Rafael Rodrigues Souza de and
Dallaqua, Renato Sergio and Barbosa, Marcos Vinicius Grala and
Rockenbach, Marlos and Dal Lago, Alisson and Mendes J{\'u}nior,
Odim and Vieira, Luis Eduardo Antunes and Banik, Marcelo and
Sibeck, D. G. and G., Kanekal. S. and Baker, D. N. and Wygant, J.
R. and A., Kletzing. C.",
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 {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 {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 {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {NASA/Goddard Space Flight Center} and {NASA/Goddard
Space Flight Center} and {University of Colorado Boulde} and
{University of Minnesota} and {University of Iowa}",
title = "The role of solar wind structures in the generation of ULF waves
in the inner magnetosphere",
journal = "Solar Physics",
year = "2017",
volume = "292",
number = "7",
month = "July",
keywords = "Solar wind transients, Solar wind geoeffectiveness, ULF waves,
Earth's outer radiation belts, MHD simulation.",
abstract = "The plasma of the solar wind incident upon the Earth's
magnetosphere can produce several types of geoeffective events.
Among them, an important phenomenon consists of the interrelation
of the magnetospheric-ionospheric current systems and the
charged-particle population of the Earth's Van Allen radiation
belts. Ultra-low-frequency (ULF) waves resonantly interacting with
such particles have been claimed to play a major role in the
energetic particle flux changes, particularly at the outer
radiation belt, which is mainly composed of electrons at
relativistic energies. In this article, we use global
magnetohydrodynamic simulations along with in situ and
ground-based observations to evaluate the ability of two different
solar wind transient (SWT) events to generate ULF (few to tens of
mHz) waves in the equatorial region of the inner magnetosphere.
Magnetic field and plasma data from the Advanced Composition
Explorer (ACE) satellite were used to characterize these two SWT
events as being a sector boundary crossing (SBC) on 24 September
2013, and an interplanetary coronal mass ejection (ICME) in
conjunction with a shock on 2 October 2013. Associated with these
events, the twin Van Allen Probes measured a depletion of the
outer belt relativistic electron flux concurrent with magnetic and
electric field power spectra consistent with ULF waves. Two
ground-based observatories apart in 90 degrees. longitude also
showed evidence of ULF-wave activity for the two SWT events.
Magnetohydrodynamic (MHD) simulation results show that the
ULF-like oscillations in the modeled electric and magnetic fields
observed during both events are a result from the SWT coupling to
the magnetosphere. The analysis of the MHD simulation results
together with the observations leads to the conclusion that the
two SWT structures analyzed in this article can be geoeffective on
different levels, with each one leading to distinct ring current
intensities, but both SWTs are related to the same disturbance in
the outer radiation belt, i.e. a dropout in the relativistic
electron fluxes. Therefore, minor disturbances in the solar wind
parameters, such as those related to an SBC, may initiate physical
processes that are able to be geoeffective for the outer radiation
belt.",
doi = "10.1007/s11207-017-1113-4",
url = "http://dx.doi.org/10.1007/s11207-017-1113-4",
issn = "0038-0938 and 1573-093X",
language = "en",
targetfile = "alves_role.pdf",
urlaccessdate = "15 jun. 2024"
}