@InProceedings{AlvesJSSMMRKNWS:2017:AmMaFi,
author = "Alves, Livia Ribeiro and Jauer, Paulo Ricardo and Souza, Vitor
Moura Cardoso e Silva and Silva, Ligia Alves da and Marchezi,
Jos{\'e} Paulo and Medeiros, Cl{\'a}udia and Rockenbach da
Silva, Marlos and Kanekal, Shrikanth G. and N., Baker Daniel and
Wygant, John R. and Sibeck, David G.",
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
Heliophysics Laboratory, NASA Goddard Space Flight Center and LASP
and {University of Minnesota} and {NASA GSFC}",
title = "Ambient magnetic field weakness during chorus event and their
implication on the outer radiation belt dynamic",
booktitle = "Proceedings...",
year = "2017",
organization = "AGU Fall Meeting",
abstract = "The Earth's magnetosphere is continuously disturbed by the solar
wind plasma incident upon it, and such a disturbance in
association with internal (to the magnetosphere) physical
processes may engender both the generation and amplification of
Very Low Frequency (VLF) range whistler-mode chorus waves in the
inner magnetosphere. Chorus waves are known to interact with
particles in the outer Van Allen radiation belt resulting in both
acceleration and pitch angle scattering into the loss cone, which
in turn leads to flux dropouts. The first two years of operational
Van Allen Probes magnetometer data were analyzed regarding the
local magnetic field variation during periods of relativistic
electron flux dropouts. It was observed that the ambient magnetic
field at the spacecraft's apogee can vary from 180 nT to as low as
30 nT. Also, the high time resolution magnetic field data show
that the whistler-mode chorus waves can often occur throughout the
periods in which the ambient magnetic field is weakened, i.e. less
than about 70 nT. We investigate the likelihood of the weakness of
the ambient magnetic field to be an additional parameter related
to outer radiation belt electron flux dropouts during periods when
only chorus waves are present.",
conference-location = "New Orleans",
conference-year = "11-15 Dec.",
language = "en",
targetfile = "alves_ambiente.pdf",
urlaccessdate = "19 mar. 2024"
}