@InProceedings{SilvaSAVSJGMAMVWSLGDSPABFBKKG:2019:CoULWa,
author = "Silva, Ligia Alves da and Sibeck, David G. and Alves, Livia
Ribeiro and Vieira, Lu{\'{\i}}s Eduardo Antunes and Souza, Vitor
Moura Cardoso e Silva and Jauer, Paulo Ricardo and G. ,
Claudepierre Seth and Marchezi, Jos{\'e} Paulo and Agapitov,
Oleksiy V. and Medeiros, Cl{\'a}udia and Vieira, Lu{\'{\i}}s
Eduardo Antunes and Wang, Chi and Shi, Jiankui and Liu, Zhengkuan
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 Virg{\'{\i}}nia and Barbosa, Marcos
Vin{\'{\i}}cius Grala and Fok, Mei-Ching Hannah and Baker,
Daniel N. and Kletzing, Craig and Kanekal, Shrikanth G. and
Georgiou, Marina",
affiliation = "{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 {The
Aerospace Corporation} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and Space Science Laboratory, UCB and {Instituto
Nacional de Pesquisas Espaciais (INPE)} and {Instituto Nacional de
Pesquisas Espaciais (INPE)} and CSSAR, CAS and {NSSC/Chinese
Academy of Sciences} and NSSC National Space Science Center, CAS
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 {University of
Colorado} and {University of Iowa} and {NASA GSFC} and {University
College London}",
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",
year = "2019",
organization = "AGU Fall Meeting",
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.",
conference-location = "San Francisco, CA",
conference-year = "09-13 dec.",
language = "en",
urlaccessdate = "23 abr. 2024"
}