| Texto completo | |
| Autor(es): |
Carmo, C. S.
;
Pi, X.
;
Denardini, C. M.
;
Figueiredo, C. A. O. B.
;
Verkhoglyadova, O. P.
;
Picanco, G. A. S.
Número total de Autores: 6
|
| Tipo de documento: | Artigo Científico |
| Fonte: | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS; v. 127, n. 10, p. 16-pg., 2022-10-01. |
| Resumo | |
This paper presents an analysis of Equatorial Plasma Bubble (EPB) events that occurred during pre- and post-sunrise hours in the South America sector on 18 March 2015, when the St. Patrick's Day geomagnetic storm was in the recovery phase. The data from a set of multi-diagnostic instruments, including Global Navigation Satellite Systems (GNSS) receivers, L-band GNSS ionospheric scintillation monitors, ionosondes, and a Fabry-Perot interferometer, are analyzed. Strong L-band amplitude scintillation was observed with spread-F and total electron content (TEC) fluctuations at times when the electron density and tTEC were minimum with respect to their diurnal variations. The EPBs remained observed for about 3:30 hr after sunrise on the east coast of the South American continent. The daytime ionospheric irregularities show a longitudinal dependency between the west and east coasts, separated by about 3,600 km. Our analysis of the observations suggests that a Disturbance Dynamo Electric Field effect caused by storm-time wind perturbations might have triggered the Rayleigh-Taylor instability near local dawn on the east and west coasts of the South American continent. The effects of ambient ionosphere-thermosphere conditions on the evolution of irregularities are assessed to understand the longitudinal differences. The assessment includes the effect of the E region that appears in the morning hours and the effects of geomagnetic declination and tilting the solar-terminator. (AU) | |
| Processo FAPESP: | 19/22548-4 - Fontes de distúrbios ionosféricos propagantes sobre a Cordilheira dos Andes |
| Beneficiário: | Cosme Alexandre Oliveira Barros Figueiredo |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado |
| Processo FAPESP: | 18/09066-8 - Distúrbios ionosféricos propagantes observados sobre a cordilheira dos andes utilizando mapas/keogramas de conteúdo eletrônico total perturbado |
| Beneficiário: | Cosme Alexandre Oliveira Barros Figueiredo |
| Modalidade de apoio: | Bolsas no Brasil - Pós-Doutorado |