@Article{SilvaSASSMMVAJAWLLDASBZK:2021:DyMeAs,
author = "Silva, Ligia Alves da and Shi, Jiankui and Alves, Livia Ribeiro
and Sibeck, David G. and Souza, Vitor Moura Cardoso e Silva and
Marchezi, Jos{\'e} Paulo and Medeiros, Cl{\'a}udia and Vieira,
Luis Eduardo Antunes and Agapitov, Oleksiy and Jauer, Paulo R. and
Alves, M. E. S. and Wang, Chi and Li, H. and Liu, Z. and Dal Lago,
Alisson and Alves, Maria Virginia and Silva, Marlos Rockenbach da
and Baker, Daniel N. and Zhang, S. Y. and Kenekal, Shrikanth G.",
affiliation = "{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Chinese
Academy of Sciences} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {NASA Goddard Space Flight Center} 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 {University of California} and {Chinese
Academy of Sciences} and {Universidade Estadual Paulista (UNESP)}
and {Chinese Academy of Sciences} and {Chinese Academy of
Sciences} and {Chinese Academy of Sciences} and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and {Laboratory for Atmosphere and Space
Physics} and {Chinese Academy of Sciences} and {NASA Goddard Space
Flight Center}",
title = "Dynamic Mechanisms Associated With High-Energy Electron Flux
Dropout in the Earth's Outer Radiation Belt Under the Influence of
a Coronal Mass Ejection Sheath Region",
journal = "Journal of Geophysical Research: Space Physics",
year = "2021",
volume = "126",
number = "1",
pages = "eJGRA56114",
month = "Jan.",
abstract = "The near-Earth interplanetary environment conditions affect the
dynamics of the relativistic electron population quasitrapped in
the radiation belts. A complex chain of processes observed in the
magnetosphere can contribute to the variability of these
populations when interplanetary structures, such as the
interplanetary counterpart of a solar coronal mass ejection
(ICME), and high-speed solar wind streams interact with the
magnetosphere. However, as these processes can coexist, it is hard
to untangle the relative contribution of each process to the loss
of particles and the eventual repopulation. Here we show evidence
that it is possible to distinguish the relative contribution of
mechanisms related to the loss of the outer radiation belt
electrons for an event observed on July 19 and 20, 2016. The
interaction of an ICME's turbulent sheath with the Earth's
magnetosphere resulted in a decrease in the outer radiation belt
relativistic electron population. The ultralow frequency (ULF) and
chorus wave activities are detected in the outer radiation belt
during the time when the Earth's magnetosphere is under the
influence of the ICME's sheath region, as well as the ICME's
magnetic cloud region, while the electromagnetic ion cyclotron
(EMIC) waves in the outer belt are observed only during the sheath
region. Dynamic mechanisms such as magnetopause shadowing, outward
radial diffusion driven by ULF waves, pitch-angle scattering
driven by both EMIC and chorus waves are quantitatively analyzed.
Our results suggest that the structures of the ICMEs can trigger
the drivers to generate the different dynamic mechanisms
responsible for the radiation belt population variability.",
doi = "10.1029/2020JA028492",
url = "http://dx.doi.org/10.1029/2020JA028492",
issn = "2169-9402",
language = "en",
targetfile = "silva_dynamic.pdf",
urlaccessdate = "20 maio 2024"
}