English   español  
Por favor, use este identificador para citar o enlazar a este item: http://hdl.handle.net/10261/139447
Compartir / Impacto:
Estadísticas
Add this article to your Mendeley library MendeleyBASE
Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Título

Upper D region chemical kinetic modeling of LORE relaxation times

AutorGordillo Vázquez, Francisco J. ; Luque, Alejandro ; Haldoupis, C.
Palabras claveKinetics underlying LOng Recovery
Early VLF events (LOREs) relaxation
Fecha de publicación15-abr-2016
EditorAmerican Geophysical Union
CitaciónJournal of Geophysical Research - Part A - Space Physics 121(4): 3525-3544 (2016)
ResumenThe recovery times of upper D region electron density elevations, caused by lightning-induced electromagnetic pulses (EMP), are modeled. The work was motivated from the need to understand a recently identified narrowband VLF perturbation named LOREs, an acronym for LOng Recovery Early VLF events. LOREs associate with long-living electron density perturbations in the upper D region ionosphere; they are generated by strong EMP radiated from large peak current intensities of +/- CG (cloud to ground) lightning discharges, known also to be capable of producing elves. Relaxation model scenarios are considered first for a weak enhancement in electron density and then for a much stronger one caused by an intense lightning EMP acting as an impulsive ionization source. The full nonequilibrium kinetic modeling of the perturbed mesosphere in the 76 to 92 km range during LORE-occurring conditions predicts that the electron density relaxation time is controlled by electron attachment at lower altitudes, whereas above 79 km attachment is balanced totally by associative electron detachment so that electron loss at these higher altitudes is controlled mainly by electron recombination with hydrated positive clusters H+(H2O)(n) and secondarily by dissociative recombination with NO+ ions, a process which gradually dominates at altitudes > 88 km. The calculated recovery times agree fairly well with LORE observations. In addition, a simplified (quasi-analytic) model build for the key charged species and chemical reactions is applied, which arrives at similar results with those of the full kinetic model. Finally, the modeled recovery estimates for lower altitudes, that is < 79 km, are in good agreement with the observed short recovery times of typical early VLF events, which are known to be associated with sprites.
Versión del editorhttp://dx.doi.org/10.1002/2015JA021408
URIhttp://hdl.handle.net/10261/139447
DOI10.1002/2015JA021408
ISSN2169-9380
E-ISSN2169-9402
Aparece en las colecciones: (IAA) Artículos
Ficheros en este ítem:
Fichero Descripción Tamaño Formato  
IAA_2016_JGR_SpacePhysics_Gordillo.pdf1,83 MBAdobe PDFVista previa
Visualizar/Abrir
Mostrar el registro completo
 

Artículos relacionados:


NOTA: Los ítems de Digital.CSIC están protegidos por copyright, con todos los derechos reservados, a menos que se indique lo contrario.