@Article{SilvaSASJCMAMVWJLGDSPABFBKKG:2019:CoULWa,
author = "Silva, Ligia A. da and Sibeck, David and Alves, Livia Ribeiro and
Souza, Vitor Moura Cardoso e Silva and Jauer, P. R. and
Claudepierre, S. G. and Marchezi, Jos{\'e} Paulo and Agapitov,
Oleksiy and Medeiros, Cl{\'a}udia and Vieira, Luis Eduardo
Antunes and Wang, Chi and Jiankui, Shi and Liu, Z. and Gonzalez
Alarcon, Walter Dem{\'e}trio and Dal Lago, Alisson and Silva,
Marlos Rockenbach da and P{\'a}dua, Marcelo Banik de and Alves,
Maria Virginia and Barbosa, Marcos Vinicius Grala and Fok,
Mei-Ching and Baker, Daniel and Kletzing, Craig and Kanekal,
Shrikanth G. and Georgiou, Marina",
affiliation = "{Chinese Academy of Sciences} and {NASA Goddard Space Flight
Center} and {Instituto Nacional de Pesquisas Espaciais (INPE)} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {Chinese
Academy of Sciences} and {The Aerospace Corporation} and
{Instituto Nacional de Pesquisas Espaciais (INPE)} and {University
of California} and {Instituto Nacional de Pesquisas Espaciais
(INPE)} and {Instituto Nacional de Pesquisas Espaciais (INPE)} 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 {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 {} and {NASA Goddard Space Flight Center}",
title = "Contribution of ULF Wave Activity to the Global Recovery of the
Outer Radiation Belt During the Passage of a High-Speed Solar Wind
Stream Observed in September 2014",
journal = "Journal of Geophysical Research: Space Physics",
year = "2019",
volume = "124",
number = "3",
pages = "1660--1678",
month = "Mar.",
abstract = "Energy coupling between the solar wind and the Earth's
magnetosphere can affect the electron population in the outer
radiation belt. However, the precise role of different internal
and external mechanisms that leads to changes of the relativistic
electron population is not entirely known. This paper describes
how ultralow frequency (ULF) wave activity during the passage of
Alfv{\'e}nic solar wind streams contributes to the global
recovery of the relativistic electron population in the outer
radiation belt. To investigate the contribution of the ULF waves,
we searched the Van Allen Probes data for a period in which we can
clearly distinguish the enhancement of electron fluxes from the
background. We found that the global recovery that started on 22
September 2014, which coincides with the corotating interaction
region preceding a high-speed stream and the occurrence of
persistent substorm activity, provides an excellent scenario to
explore the contribution of ULF waves. To support our analyses, we
employed ground- and space-based observational data and global
magnetohydrodynamic simulations and calculated the ULF wave radial
diffusion coefficients employing an empirical model. Observations
show a gradual increase of electron fluxes in the outer radiation
belt and a concomitant enhancement of ULF activity that spreads
from higher to lower L-shells. Magnetohydrodynamic simulation
results agree with observed ULF wave activity in the magnetotail,
which leads to both fast and Alfv{\'e}n modes in the
magnetospheric nightside sector. The observations agree with the
empirical model and are confirmed by phase space density
calculations for this global recovery period.",
doi = "10.1029/2018JA026184",
url = "http://dx.doi.org/10.1029/2018JA026184",
issn = "2169-9380",
language = "en",
targetfile = "
Silva_et_al-2019-Journal_of_Geophysical_Research__Space_Physics.pdf",
urlaccessdate = "16 maio 2024"
}