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Diurnal and seasonal variation of the ionogram-derived scale height at the F2 peak
Zhang, M. L.; Reinisch, B. W.; Shi, J. K.; Wu, S. Z.; Wang, X.
Department空间天气学国家重点实验室
Source PublicationAdvances in specifying plasma temperatures and ion composition in the ionosphere
2006
Pages967-971
Language英语
ISBN0273-1177
AbstractThe Chapman scale height H-T at F2 peak, which can be used to construct a topside electron density profile model, is deduced from ground-based ionograms. In this paper, H-T values obtained from ionograms recorded at the low latitude station Hainan (19.4 degrees N, 109.0 degrees E), China is used to study its diurnal, seasonal, and solar activity dependence. The correlations between H-T and the F2 peak parameters foF2 and hmF2, the best-fitted IRI-parameter B0, and the ionospheric slab thickness tau are also studied. Data used for the present study covered a 2-year time period from March 2002 to February 2004. The present study showed that: (1) Diurnal course of the H-T has two peaks, with the main one occurring at daytime hours around noontime and the other occurring before sunrise. The pre-sunrise peak is most obvious for winter compared with that for summer and equinox. The minimum values of H-T occur around midnight and sunrise hours. The time of occurrence of the sunrise minimum is earliest for summer and latest for winter. (2) H-T shows a clear annual variation with largest daytime values occurring in summer and smallest values in winter. (3) H-T shows strong solar activity dependence, with the daytime value of H-T decreasing with decreasing solar activity. (4) HT is strongly correlated with the bottomside F2 layer thickness parameter B0 and the ionospheric slab thickness tau. The high correlation between H-T and B0 parameter suggests the possibility to construct the topside electron density profile model based on the B0 parameter previously established for the International Reference Ionosphere.
KeywordLow Latitude Ionosphere Scale Height Ionogram Diurnal And Seasonal Variation
Conference Name35th COSPAR Scientific Assembly
Conference Date2006
Conference PlaceParis, FRANCE
Indexed ByCPCI
Document Type会议论文
Identifierhttp://ir.nssc.ac.cn/handle/122/924
Collection空间科学部
Recommended Citation
GB/T 7714
Zhang, M. L.,Reinisch, B. W.,Shi, J. K.,et al. Diurnal and seasonal variation of the ionogram-derived scale height at the F2 peak[C]. OXFORD:Elsevier Science Ltd,2006:967-971.
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