Mostrar el registro sencillo del ítem Hysell, D. L. 2018-10-22T16:14:47Z 2018-10-22T16:14:47Z 2000-10-06
dc.identifier.citation Hysell, D. L. (2000). An overview and synthesis of plasma irregularities in equatorial spread F.==$Journal of Atmospheric and Solar-Terrestrial Physics, 62$==(12), 1037-1056. es_ES
dc.description.abstract A unified picture of plasma irregularities in equatorial spread F is developed from the analysis of satellite, sounding rocket, and coherent scatter radar observations. The coherent scatter data are analyzed using a new in-beam radar imaging technique that permits direct comparison between radar data, in situ data, and computer simulations of the irregularities. Three varieties of irregularities, all produced by ionospheric interchange instabilities, are found to occur. Thin bottom-type layers are composed of waves with primary transverse wavelengths less than about 1 km and with significant parallel wavenumbers. These exist on magnetic flux tubes controlled by the E region dynamo and drift westward in the postsunset ionosphere. A nonlocal analysis is used to calculate their linear growth rate. When the F region dynamo takes control of the flux tube, bottomside irregularities can emerge. These are more robust irregularities with longer primary wavelengths and which exhibit greater vertical development. Nonlinear analyses explain the appearance of steepened structures in rocket observations and solitary waves in satellite observations of bottomside layers. The one-dimensional spectra of these irregularities obey power laws but are anisotropic and have variable spectral indices and spectral breaks. Very strong polarization electric fields can eject large regions of deeply depleted plasma through the F peak and form topside irregularities. Theoretical calculations supported by satellite data show that ion inertia may become important for topside irregularities. The one-dimensional spectra of irregularities in the inertial regime obey a k−5/3 power law, but strong plasma inhomogeneity implies that Kolmogorov weak turbulence is not the explanation. Topside depletions are shown to bifurcate and also to pinch off from the bottomside. 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 Ionospheric irregularities es_ES
dc.subject Equatorial ionosphere es_ES
dc.subject Equatorial spread F es_ES
dc.title An overview and synthesis of plasma irregularities in equatorial spread F 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




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