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dc.contributor.author Hysell, D. L.
dc.contributor.author Chau Chong Shing, Jorge Luis
dc.date.accessioned 2018-07-13T11:50:36Z
dc.date.available 2018-07-13T11:50:36Z
dc.date.issued 2002
dc.identifier.issn 1432-0576
dc.identifier.uri http://repositorio.igp.gob.pe/handle/IGP/1799
dc.description En: Annales Geophysicae, v. 20, n. 8 (August 2002) p. 1167-1179. es_ES
dc.description.abstract "Large-scale (λ∼1 km) waves in the daytime and nighttime equatorial electrojet are studied using coherent scatter radar data from Jicamarca. Images of plasma irregularities within the main beam of the radar are formed using interferometry with multiple baselines. These images are analyzed according to nonlocal gradient drift instability theory and are also compared to nonlinear computer simulations carried out recently by Ronchi et al. (1991) and Hu and Bhattacharjee (1999). In the daytime, the large-scale waves assume a non-steady dynamical equilibrium state characterized by the straining and destruction of the waves by shear and diffusion followed by spontaneous regeneration as predicted by Ronchi et al. (1991). At night, when steep plasma density gradients emerge, slowly propagating large-scale vertically extended waves predominate. Eikonal analysis suggests that these waves are trapped (absolutely unstable) or are nearly trapped (convectively unstable) and are able to tunnel between altitude regions which are locally unstable. Intermediate-scale waves are mainly transient (convectively stable) but can become absolutely unstable in narrow altitude bands determined by the background density profile. These characteristics are mainly consistent with the simulations presented by Hu and Bhattacharjee (1999). A new class of large-scale primary waves is found to occur along bands that sweep westward and downward from high altitudes through the E-region at twilight." es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher European Geosciences Union (EGU) es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri info:eu-repo/semantics/restrictedAccess es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Ondas de plasma es_ES
dc.subject Interferometría es_ES
dc.subject Ionósfera--Investigación es_ES
dc.subject Electrochorro ecuatorial es_ES
dc.subject Radar de dispersión incoherente es_ES
dc.subject Electrodinámica es_ES
dc.subject Inestabilidades del plasma es_ES
dc.title Imaging radar observations and nonlocal theory of large-scale plasma waves in the equatorial electrojet es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Atmósfera es_ES
dc.subject.ocde Física es_ES
dc.subject.ocde Fotogrametría es_ES
dc.subject.ocde Observación es_ES
dc.identifier.journal Annales Geophysicae es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.5194/angeo-20-1167-2002 es_ES

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