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1. Identificação
Tipo de ReferênciaArtigo em Revista Científica (Journal Article)
Sitemtc-m21c.sid.inpe.br
Código do Detentorisadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S
Identificador8JMKD3MGP3W34R/3T3HSMP
Repositóriosid.inpe.br/mtc-m21c/2019/04.02.16.38   (acesso restrito)
Última Atualização2019:04.02.16.38.34 (UTC) simone
Repositório de Metadadossid.inpe.br/mtc-m21c/2019/04.02.16.38.34
Última Atualização dos Metadados2022:03.18.22.11.29 (UTC) administrator
DOI10.1029/2018SW002094
ISSN1542-7390
Chave de CitaçãoEspinosaSarmientoPadiAlve:2019:CaStLo
TítuloEffects of ionospheric conductivity and ground conductance on geomagnetically induced currents during geomagnetic storms: case studies at low-latitude and Equatorial regions
Ano2019
MêsFeb.
Data de Acesso06 maio 2024
Tipo de Trabalhojournal article
Tipo SecundárioPRE PI
Número de Arquivos1
Tamanho3553 KiB
2. Contextualização
Autor1 Espinosa Sarmiento, Karen Viviana
2 Padilha, Antonio Lopes
3 Alves, Livia Ribeiro
Identificador de Curriculo1
2 8JMKD3MGP5W/3C9JGJG
Grupo1 GESAST-CEA-SESPG-INPE-MCTIC-GOV-BR
2 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
3 DIDGE-CGCEA-INPE-MCTIC-GOV-BR
Afiliação1 Instituto Nacional de Pesquisas Espaciais (INPE)
2 Instituto Nacional de Pesquisas Espaciais (INPE)
3 Instituto Nacional de Pesquisas Espaciais (INPE)
Endereço de e-Mail do Autor1 karen.sarmiento@inpe.br
2 antonio.padilha@inpe.br
3 livia.alves@inpe.br
RevistaSpace Weather
Volume17
Número2
Páginas252-268
Nota SecundáriaB1_INTERDISCIPLINAR B1_GEOCIÊNCIAS B2_ASTRONOMIA_/_FÍSICA
Histórico (UTC)2019-04-02 16:38:44 :: simone -> administrator :: 2019
2022-03-18 22:11:29 :: administrator -> simone :: 2019
3. Conteúdo e estrutura
É a matriz ou uma cópia?é a matriz
Estágio do Conteúdoconcluido
Transferível1
Tipo do ConteúdoExternal Contribution
Tipo de Versãopublisher
ResumoGeomagnetic field variations recorded by fluxgate magnetometers are used to evaluate geomagnetically induced currents (GICs) under the equatorial electrojet (EEJ) and South Atlantic Magnetic Anomaly (SAMA) during two geomagnetic storms in March and June 2015. Geomagnetic stations with information about the underground electrical conductivity structure and that can be approximated by unidimensional (1-D) models for calculation of the geoelectric field are selected. GICs levels are estimated using a realistic local power grid model located in the central region of Brazil, artificially moved to the sites where the geomagnetic measurements are available. GIC magnitudes are not large during the storms, and a maximum amplitude of 3.8 A was estimated at an equatorial station positioned over high resistivity underground during the main phase of the June storm. Effects of the ionospheric currents over the measurement sites and of the conductivity distribution beneath these sites are also evaluated. It is observed that both (EEJ) and (SAMA) increase the GICs amplitudes, with the greatest effects associated with daytime (EEJ) currents. A cutoff frequency was identified for both the (EEJ) and (SAMA) so that signals with frequencies lower than 2 mHz (periods longer than 500 s) are not amplified by the ionospheric currents. In relation to the underlying conductivity structure, GIC magnitude is affected by variation of the surface impedance and the sampling rate of the geomagnetic field. In our case, differences in amplitude of the surface impedance at the Nyquist frequency control the relative effects of the ground conductance between the stations.
ÁreaCEA
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4. Condições de acesso e uso
Idiomaen
Arquivo AlvoEspinosa_et_al-2019-Space_Weather.pdf
Grupo de Usuáriossimone
Grupo de Leitoresadministrator
simone
Visibilidadeshown
Permissão de Leituradeny from all and allow from 150.163
Permissão de Atualizaçãonão transferida
5. Fontes relacionadas
Unidades Imediatamente Superiores8JMKD3MGPCW/3EU29DP
8JMKD3MGPCW/3F2PBEE
Lista de Itens Citandosid.inpe.br/bibdigital/2013/10.01.22.11 4
sid.inpe.br/mtc-m21/2012/07.13.14.40.26 2
DivulgaçãoWEBSCI; SCOPUS.
Acervo Hospedeirourlib.net/www/2017/11.22.19.04
6. Notas
Campos Vaziosalternatejournal archivingpolicy archivist callnumber copyholder copyright creatorhistory descriptionlevel e-mailaddress format isbn keywords label lineage mark mirrorrepository nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress project rightsholder schedulinginformation secondarydate secondarykey session shorttitle sponsor subject tertiarymark tertiarytype url
7. Controle da descrição
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