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Tipo da ReferênciaJournal Article
Repositó   (acesso restrito)
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Chave de CitaçãoAbdu:2016:ElIoWe
AutorAbdu, Mangalathayil Ali
Identificador de Curriculo8JMKD3MGP5W/3C9JHNK
AfiliaçãoInstituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do
TítuloElectrodynamics of ionospheric weather over low latitudes
RevistaGeoscience Letters
ResumoThe dynamic state of the ionosphere at low latitudes is largely controlled by electric fields originating from dynamo actions by atmospheric waves propagating from below and the solar wind-magnetosphere interaction from above. These electric fields cause structuring of the ionosphere in wide ranging spatial and temporal scales that impact on space-based communication and navigation systems constituting an important segment of our technology-based day-to-day lives. The largest of the ionosphere structures, the equatorial ionization anomaly, with global maximum of plasma densities can cause propagation delays on the GNSS signals. The sunset electrodynamics is responsible for the generation of plasma bubble wide spectrum irregularities that can cause scintillation or even disruptions of satellite communication/navigation signals. Driven basically by upward propagating tides, these electric fields can suffer significant modulations from perturbation winds due to gravity waves, planetary/Kelvin waves, and non-migrating tides, as recent observational and modeling results have demonstrated. The changing state of the plasma distribution arising from these highly variable electric fields constitutes an important component of the ionospheric weather disturbances. Another, often dominating, component arises from solar disturbances when coronal mass ejection (CME) interaction with the earths magnetosphere results in energy transport to low latitudes in the form of storm time prompt penetration electric fields and thermospheric disturbance winds. As a result, drastic modifications can occur in the form of layer restructuring (Es-, F3 layers etc.), large total electron content (TEC) enhancements, equatorial ionization anomaly (EIA) latitudinal expansion/contraction, anomalous polarization electric fields/vertical drifts, enhanced growth/suppression of plasma structuring, etc. A brief review of our current understanding of the ionospheric weather variations and the electrodynamic processes underlying them and some outstanding questions will be presented in this paper.
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Tamanho6292 KiB
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Última Atualização2016: simone
Última Atualização dos Metadados2018: administrator {D 2016}
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Unidades Imediatamente Superiores8JMKD3MGPCW/3ETL868
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Histórico2016-06-10 13:45:02 :: simone -> administrator :: 2016
2016-06-20 12:11:35 :: administrator -> simone :: 2016
2016-06-20 12:13:48 :: simone -> administrator :: 2016
2018-06-04 02:40:55 :: administrator -> simone :: 2016
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Data de Acesso19 out. 2020