Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region
Scale height is an important parameter in characterizing the shape of the ionosphere and its physical processes. In this study, we attempt to examine and discuss the variation of scale height, Hm, around the F-layer peak height during high solar activity at the northern crest of the equatorial ioniz...
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Wiley
2014-01-01
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| Series: | The Scientific World Journal |
| Online Access: | http://dx.doi.org/10.1155/2014/397402 |
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| author | Yu-Jung Chuo |
| author_facet | Yu-Jung Chuo |
| author_sort | Yu-Jung Chuo |
| collection | DOAJ |
| description | Scale height is an important parameter in characterizing the shape of the ionosphere and its physical processes. In this study, we attempt to examine and discuss the variation of scale height, Hm, around the F-layer peak height during high solar activity at the northern crest of the equatorial ionization anomaly (EIA) region. Hm exhibits day-to-day variation and seasonal variation, with a greater average daily variation during daytime in summer. Furthermore, the diurnal variation of Hm exhibits an abnormal peak at presunrise during all the seasons, particularly in winter. This increase is also observed in the F2-layer peak height for the same duration with an upward movement associated with thermospheric wind toward the equator; this upward movement increases the N2/O ratio and Hm, but it causes a decrease in the F2-layer maximum critical frequency during the presunrise period. |
| format | Article |
| id | doaj-art-9e045cb9a5de4447ab3727f27745a67d |
| institution | Kabale University |
| issn | 2356-6140 1537-744X |
| language | English |
| publishDate | 2014-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | The Scientific World Journal |
| spelling | doaj-art-9e045cb9a5de4447ab3727f27745a67d2025-02-03T01:21:43ZengWileyThe Scientific World Journal2356-61401537-744X2014-01-01201410.1155/2014/397402397402Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly RegionYu-Jung Chuo0Department of Information Technology, Ling Tung University, Taichung 408, TaiwanScale height is an important parameter in characterizing the shape of the ionosphere and its physical processes. In this study, we attempt to examine and discuss the variation of scale height, Hm, around the F-layer peak height during high solar activity at the northern crest of the equatorial ionization anomaly (EIA) region. Hm exhibits day-to-day variation and seasonal variation, with a greater average daily variation during daytime in summer. Furthermore, the diurnal variation of Hm exhibits an abnormal peak at presunrise during all the seasons, particularly in winter. This increase is also observed in the F2-layer peak height for the same duration with an upward movement associated with thermospheric wind toward the equator; this upward movement increases the N2/O ratio and Hm, but it causes a decrease in the F2-layer maximum critical frequency during the presunrise period.http://dx.doi.org/10.1155/2014/397402 |
| spellingShingle | Yu-Jung Chuo Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region The Scientific World Journal |
| title | Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region |
| title_full | Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region |
| title_fullStr | Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region |
| title_full_unstemmed | Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region |
| title_short | Variations of Scale Height at F-Region Peak Based on Ionosonde Measurements during Solar Maximum over the Crest of Equatorial Ionization Anomaly Region |
| title_sort | variations of scale height at f region peak based on ionosonde measurements during solar maximum over the crest of equatorial ionization anomaly region |
| url | http://dx.doi.org/10.1155/2014/397402 |
| work_keys_str_mv | AT yujungchuo variationsofscaleheightatfregionpeakbasedonionosondemeasurementsduringsolarmaximumoverthecrestofequatorialionizationanomalyregion |