Mostrar el registro sencillo del ítem Lee, Chien-Chih 2018-11-20T18:18:07Z 2018-11-20T18:18:07Z 2016-09-06
dc.identifier.issn 2169-9402
dc.description.abstract "This study compares the F1 layer critical frequencies (foF1) between the 22/23 and 23/24 solar minimums to investigate the effects of extremely low solar activities on F1 layer. The foF1 data of 1996 and 2008 at various latitudes are collected and analyzed. Results show that the foF1 value in 2008 is quantitatively identical to that in 1996. This equality of foF1 is contrary to the expectation, since the solar activities are lower in 2008 than in 1996. In order to know the reason for the unexpected results, the production rate (q) of ionization in F1 layer is examined. The EUV intensity and q at the peak of the q profile are calculated, through the integration of atmospheric number densities above the peak. Because the thermospheric densities are anomalously low under extremely low solar activities, the EUV attenuations are unusually small. The EUV intensity and q at the peak in 2008 are almost equal to those in 1996. Further, the equality of foF1 between 1996 and 2008, obtained from the equality of q at the peak, is consistent with the observed results". es_ES
dc.format application/pdf es_ES
dc.language.iso eng es_ES
dc.publisher Journal of Geophysical Research: Space Physics es_ES
dc.rights info:eu-repo/semantics/restrictedAccess es_ES
dc.rights.uri es_ES
dc.source Repositorio institucional - IGP es_ES
dc.subject Región F es_ES
dc.subject Ciclo solar es_ES
dc.subject Actividad solar es_ES
dc.subject Ionósfera--Observaciones es_ES
dc.subject Ionósfera--Investigación es_ES
dc.subject Ionosondas es_ES
dc.subject Radar--Observaciones es_ES
dc.title Comparison of F1 layer critical frequency between recent two solar minimums es_ES
dc.type info:eu-repo/semantics/article es_ES
dc.subject.ocde Atmósfera es_ES
dc.subject.ocde Observación es_ES
dc.subject.ocde Radar es_ES
dc.subject.ocde Geofísica es_ES
dc.subject.ocde Ciencias espaciales es_ES
dc.identifier.journal Journal of Geophysical Research: Space Physics es_ES
dc.description.peer-review Por pares es_ES
dc.identifier.doi 10.1002/2016JA023026 es_ES




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