Mostrar el registro sencillo del ítem Yizengaw, E. Moldwin, M. B. Mebrahtu, A. Damtie, B. Zesta, E. Valladares, C. E. Doherty, P. 2018-11-07T18:00:10Z 2018-11-07T18:00:10Z 2010-08-12
dc.identifier.citation Yizengaw, E., Moldwin, M. B., Mebrahtu, A., Damtie, B., Zesta, E., Valladares, C. E., & Doherty, P. (2010). Comparison of storm time equatorial ionospheric electrodynamics in the African and American sectors.==$Journal of Atmospheric and Solar-Terrestrial Physics, 73$==(1), 156-163. es_ES
dc.description.abstract The characteristics of storm time (corotating interaction regions (CIR)-driven storm that happened on 9 August 2008) equatorial electrojet (EEJ) phenomena and their effect on the ionospheric density structure at two different longitudinal sectors are presented. Equatorial magnetometer data, occultation density profiles from COSMIC and CHAMP LEO satellites, and ground-based GPS TEC are used. We find unusual density reduction around local noon at the same time when we observe the reversal of electrojet current and thus counter-equatorial electrojet (CEJ) signatures. The continuous energy deposition in to high latitudes due to the CIR-driven storm that triggers the E-region dynamo and the penetrating magnetospheric origin electric field is suggested to be responsible for the reversal of equatorial electrojet current flows. We also compare the magnitude and direction of the driving force (E×B drift) in the American and African sectors for the first time. It was found that at the same local time the E×B drift in the American sector is stronger than that of the African sector. Previously, the uneven distribution of ground-based instruments hindered our ability to obtain a global understanding of the dynamics and structure of the ionosphere. The newly deployed ground-based instruments, primarily in the African sector, provide the opportunity to observe the governing equatorial electrodynamics simultaneously with the ionospheric density structures detected by the instrument onboard low-Earth-orbit (LEO) satellites. To our knowledge this is the first simultaneous observation performed in the African sector. This case study may provide additional input that could be used to explain the unique density irregularities that are often seen from in situ satellite observation in the African sector, a region that has been devoid of ground-based instrumentations. es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof urn:issn:1364-6826
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.subject Equatorial Electrojet es_ES
dc.subject Equatorial ionosphere es_ES
dc.subject Electric fields es_ES
dc.subject CIR-driven storm es_ES
dc.title Comparison of storm time equatorial ionospheric electrodynamics in the African and American sectors es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde es_ES
dc.identifier.journal Journal of Atmospheric and Solar-Terrestrial Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi es_ES




Mostrar el registro sencillo del ítem