Artículo
Ionospheric F-region observations over American sector during an intense space weather event using multi-instruments
de Abreu, A.J.; Martin, I.M.; Fagundes, P.R.; Venkatesh, K.; Batista, I.S.; de Jesus, R.; Rockenback, M.; Coster, A.; Gende, Mauricio Alfredo
; Alves, M.A.; Wild, M.
Fecha de publicación:
04/2017
Editorial:
Elsevier
Revista:
Journal of Atmospheric and Solar-Terrestrial Physics
ISSN:
1364-6826
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
The critical interaction between the magnetosphere and ionosphere during intense geomagnetic storms continues to be important to space weather studies. In this investigation, we present and discuss the ionospheric F-region observations in the equatorial, low- and mid-latitude regions in both hemispheres over American sector during the intense geomagnetic storm on 01–03 June 2013. The geomagnetic storm reached a minimum Dst of −119 nT at 0900 UT on 01 June. For this investigation, we present vertical total electron content (VTEC) and phase fluctuations (in TECU/min) from a chain of 10 GPS stations and the ionospheric parameters foF2 and h′F from a chain of 4 digital ionosonde stations, covering from equatorial to mid-latitudes regions over American sector during the entire storm-time period 31 May–03 June 2013. In addition, the plasma density observed from DMSP satellites is presented. The results obtained show that during the sudden impulse/SSC and throughout the main phase of the storm, a large positive phase was observed in mid-latitudes of the northern hemisphere, which could be due to changes in the thermospheric wind circulation. On the other hand, in the mid-latitudes of the southern hemisphere, no deviations are observed in VTEC and foF2 when compared to the quiet period. During the long recovery phase of the storm on 01–02 June, a north-south asymmetry is observed in the F-region. The study confirms the dominant role of the thermospheric winds on north-south asymmetry in the ionospheric F-region. The ionospheric irregularities are found to be confined in the equatorial region, of the bottomside spread-F type, before and during the geomagnetic storm. It shows that the geomagnetic storm did not affect the generation or suppression of ionospheric irregularities at the stations investigated.
Palabras clave:
Geomagnetic Storm
,
Ionosphere
,
Ionospheric Irregularities
,
Space Weather
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Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Citación
de Abreu, A.J.; Martin, I.M.; Fagundes, P.R.; Venkatesh, K.; Batista, I.S.; et al.; Ionospheric F-region observations over American sector during an intense space weather event using multi-instruments; Elsevier; Journal of Atmospheric and Solar-Terrestrial Physics; 156; 4-2017; 1-14
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