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dc.contributor.author Moro, J.
dc.contributor.author Denardini, C. M.
dc.contributor.author Resende, L. C. A.
dc.contributor.author Chen, S. S.
dc.contributor.author Schuch, N. J.
dc.date.accessioned 2018-11-21T13:12:18Z
dc.date.available 2018-11-21T13:12:18Z
dc.date.issued 2016-09-23
dc.identifier.citation Moro, J., Denardini, C. M., Resende, L. C. A., Chen, S. S., & Schuch, N. J. (2016). Equatorial E region electric fields at the dip equator: 2. Seasonal variabilities and effects over Brazil due to the secular variation of the magnetic equator.==$Journal of Geophysical Research: Space Physics, 121$==(10), 10,231-10,240. https://doi.org/10.1002/2016JA022753 es_ES
dc.identifier.uri http://hdl.handle.net/20.500.12816/3770
dc.description.abstract In this work, the seasonal dependency of the E region electric field (EEF) at the dip equator is examined. The eastward zonal (Ey) and the daytime vertical (Ez) electric fields are responsible for the overall phenomenology of the equatorial and low‐latitude ionosphere, including the equatorial electrojet (EEJ) and its plasma instability. The electric field components are studied based on long‐term backscatter radars soundings (348 days for both systems) collected during geomagnetic quiet days (Kp ≤ 3+), from 2001 to 2010, at the São Luís Space Observatory (SLZ), Brazil (2.33°S, 44.20°W), and at the Jicamarca Radio Observatory (JRO), Peru (11.95°S, 76.87°W). Among the results, we observe, for the first time, a seasonal difference between the EEF in these two sectors in South America based on coherent radar measurements. The EEF is more intense in summer at SLZ, in equinox at JRO, and has been highly variable with season in the Brazilian sector compared to the Peruvian sector. In addition, the secular variation on the geomagnetic field and its effect on the EEJ over Brazil resulted that as much farther away is the magnetic equator from SLZ, later more the EEJ is observed (10 h LT) and sooner it ends (16 h LT). Moreover, the time interval of type II occurrence decreased significantly after the year 2004, which is a clear indication that SLZ is no longer an equatorial station due to the secular variation of the geomagnetic field. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher American Geophysical Union es_ES
dc.relation.ispartof urn:issn:2169-9380
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject Space weather es_ES
dc.subject E region electric field es_ES
dc.subject Seasonal dependence es_ES
dc.subject Secular variations es_ES
dc.title Equatorial E region electric fields at the dip equator: 2. Seasonal variabilities and effects over Brazil due to the secular variation of the magnetic equator es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde http://purl.org/pe-repo/ocde/ford#1.05.01 es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi https://doi.org/10.1002/2016JA022753 es_ES

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