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dc.contributorUniversitat Ramon Llull. Observatori de l’Ebre
dc.contributorObservatori de l’Ebre-CSIC
dc.contributor.authorMarsal Vinadé, Santiago
dc.date.accessioned2018-02-27T12:28:05Z
dc.date.accessioned2023-07-13T09:14:54Z
dc.date.available2018-02-27T12:28:05Z
dc.date.available2023-07-13T09:14:54Z
dc.date.created2015-04-29
dc.date.issued2015-09-26
dc.identifier.urihttp://hdl.handle.net/20.500.14342/2486
dc.description.abstractThe Active Magnetosphere and Planetary Electrodynamics Response Experiment (AMPERE) satellite mission has offered for the first time global snapshots of the geomagnetic field-aligned currents with unprecedented space and time resolution, thus providing an opportunity to feed an acknowledged first-principles model of the Earth’s upper atmosphere such as the National Center for Atmospheric Research Thermosphere-Ionosphere-Electrodynamics General Circulation Model (NCAR TIE-GCM). In the first step, Marsal et al. (2012) used AMPERE data in the current continuity equation between the magnetosphere and the ionosphere to drive the TIE-GCM electrodynamics. In the present work, ionospheric conductivities have been made consistent with enhanced upward field-aligned currents, which are assumed to correspond to electrons plunging as a result of downward acceleration by electric fields built up along the geomagnetic field lines. The resulting conductance distribution is reasonably commensurate with an independent model that has tried to quantify the ionizing effect of precipitating particles onto the auroral ionosphere. On the other hand, comparison of geomagnetic observatory data with the ground magnetic variations output by the model only shows a modest improvement with respect to our previous approach.eng
dc.format.extent21 p.
dc.language.isoeng
dc.publisherAmerican Geophysical Union
dc.relation.ispartofMarsal,S.(2015),Conductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM, J. Geophys. Res. Space Physics, 120, 8045–8065, doi:10.1002/ 2015JA021385.
dc.relation.ispartofseriesJournal of geophysical research. Space physics;120
dc.rights© American Geophysical Union. Tots els drets reservats.
dc.sourceRECERCAT (Dipòsit de la Recerca de Catalunya)
dc.subject.otherGeomagnetism
dc.subject.otherIonospheric conductivities
dc.subject.otherField aligned currents
dc.titleConductivities consistent with Birkeland currents in the AMPERE-driven TIE-GCM
dc.typeinfo:eu-repo/semantics/article
dc.rights.accessLevelinfo:eu-repo/semantics/openAccess
dc.embargo.termscap
dc.subject.udc537
dc.identifier.doihttp://dx.doi.org/10.1002/2015JA021385


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