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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Variabilities of the equatorial electrojet in Brazil and Peru

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Autor(es):
Shume, E. B. [1] ; Denardini, C. M. [1] ; de Paula, E. R. [1] ; Trivedi, N. B. [2]
Número total de Autores: 4
Afiliação do(s) autor(es):
[1] INPE DAE, Natl Inst Space Res, Aeron Div, BR-12227010 Sao Paulo - Brazil
[2] INPE DAE, Natl Inst Space Res, Space Geophys Div, BR-12227010 Sao Paulo - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF GEOPHYSICAL RESEARCH; v. 115, JUN 16 2010.
Citações Web of Science: 20
Resumo

This report presents seasonal and longitudinal variabilities of the equatorial electrojet in the east (Brazil, Sao Luis: 2.3 degrees S; 315.8 degrees E; 0.5 degrees S dip latitude) and west (Jicamarca, Per : 11.95 degrees S; 283.13 degrees E; 0.6 degrees N dip latitude) coasts of the continent of South America. Ground-based magnetic field perturbation measurements Delta H for solar maximum (2001/2002) and solar minimum (2006/2007) conditions from the two equatorial stations (Sao Luis and Jicamarca) have been used for the study. The Delta H signal which is a measure of the strength of the equatorial electrojet is spectrally analyzed using wavelet analysis. The results of our analysis show that (1) the equatorial electrojet has maxima around equinoxes in Jicamarca, Per but it has a prominent maximum during Southern Hemisphere summer (centered about December/January) in Sao Luis, Brazil. The observed seasonal behavior of the equatorial electrojet in Sao Luis is highly likely due to the large magnetic declination angle (about 20 west) there. (2) The equatorial electrojet is stronger in the west coast (Jicamarca) compared to the east coast (Sao Luis), irrespective of solar activity condition. (3) The magnitude of the equatorial electrojet is more variable with season and solar cycle over Sao Luis than over Jicamarca. (AU)

Processo FAPESP: 07/08185-9 - Investigação das irregularidades do plasma do eletrojato equatorial e do eco de 150 km no setor brasileiro utilizando multi-instrumentos e modelagem
Beneficiário:Esayas Belay Shume
Linha de fomento: Bolsas no Brasil - Pós-Doutorado