Photoelectron transport and energy balance in the low-latitude ionosphere

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dc.contributor.advisorKelley, Michael
dc.contributor.authorVarney, Roger Hale
dc.date.accessioned2015-07-24T13:51:21Z
dc.date.accessioned2017-02-27T22:52:05Z
dc.date.available2015-07-24T13:51:21Z
dc.date.available2017-02-27T22:52:05Z
dc.date.issued2012
dc.description.abstractTheoretical studies of ionospheric structure and dynamics require knowledge of the underlying thermal structure of the ionosphere since it affects the chemical reaction rates, recombination rates, and pressure gradients. Measurements of ionospheric temperatures have been made for decades with a variety of ground- and space-based techniques. This thesis is motivated in particular by the recent improvements in the temperature measurements made by the Jicamarca Radio Observatory (JRO) using the incoherent scatter radar (ISR) technique. Modern ionospheric models all have widely different treatments of ionospheric energetics, and none can produce satisfactory quantitative agreement with the JRO measurements even in quiet conditions. This thesis explores the energy balance calculations in the widely used, open source SAMI2 model in detail, and shows that it is the oversimplification of the treatment of nonlocal heating by photoelectrons in particular which is pre- venting this model from predicting JRO measurements. This thesis presents an extended version of the SAMI2 model, called SAMI2-PE, which includes a newly developed photoelectron transport model. The model uses finite volume methods which guarantee conservation of particles and energy, incorporates the magnetic field geometry and magnetic mirroring effects, and can be extended to any spatial, energy, and pitch-angle resolution. The new model shows promising agreement with the JRO measurements.es_ES
dc.description.uriTesises_ES
dc.formatapplication/pdfes_ES
dc.identifier.citationVarney, R. H. (2012).==$Photoelectron transport and energy balance in the low-latitude ionosphere$==(Dissertation for the degree of Doctor of Philosophy). Cornell University, United States.es_ES
dc.identifier.urihttp://hdl.handle.net/20.500.12816/26
dc.language.isoenges_ES
dc.publisherCornell Universityes_ES
dc.rightsinfo:eu-repo/semantics/openAccesses_ES
dc.rights.urihttps://creativecommons.org/licences/by/4.0/es_ES
dc.subjectIonospherees_ES
dc.subjectAtmospheric temperaturees_ES
dc.subjectRadares_ES
dc.subjectMagnetic fieldes_ES
dc.subjectEnergy balancees_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#1.05.01es_ES
dc.subject.ocdehttp://purl.org/pe-repo/ocde/ford#2.02.00es_ES
dc.titlePhotoelectron transport and energy balance in the low-latitude ionospherees_ES
dc.typeinfo:eu-repo/semantics/doctoralThesises_ES
thesis.degree.disciplineIngeniería Eléctricaes_ES
thesis.degree.grantorCornell Universityes_ES
thesis.degree.levelDoctoradoes_ES
thesis.degree.nameDoctor of Philosophyes_ES

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