Adebesin, B.O. and Adekoya, B J and Ikubanni, S.O. and Adebiyi, S.J. and Adebesin, O A and Joshua, B W and Olonade, K O (2014) Ionospheric foF2 morphology and response of F2 layer height over Jicamarca during different solar epochs and comparison with IRI-2012 model. Journal of Earth System Science, 123 (4). pp. 751-765. ISSN 0253-4126
Full text not available from this repository.Abstract
Diurnal, seasonal and annual foF2 variability and the response of the F2-layer height over Jicamarca (11.9◦S, 76.8◦W, 1◦N dip) during periods of low (LSA), moderate (MSA) and high (HSA) solar activities was investigated. The relative standard deviation (VR) was used for the analysis. The F2-layer critical frequency pre-noon peak increases by a factor of 2 more than the post-noon peak as the solar activity increases. The variability coefficient (VR) is lowest during the day (7–16%) for the three solar epochs; increases during nighttime (20–26%, 14–26%, and 10–20%, respectively for the LSA, MSA and HSA years); and attained highest magnitude during sunrise (21–27%, 24–27%, and 19–30%, respectively in similar order). Two major peaks were observed in VR – the pre-sunrise peak, which is higher, and the post-sunset peak. Generally, the variability increases as the solar activity decreases. Annually, VR peaks within 23–24%, 19–24% and 15–24% for the LSA, MSA, and HSA periods, respectively. The ionospheric F2-layer height rises to the higher level with increasing solar activity. The foF2 comparison results revealed that Jicamarca is well represented on the IRI-2012 model, with an improvement on the URSI option. The importance of vertical plasma drift and photochemistry in the F2-layer was emphasized.
| Item Type: | Article |
|---|---|
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Depositing User: | DR. B. OLUFEMI ADEBESIN |
| Date Deposited: | 12 Jun 2015 20:23 |
| Last Modified: | 13 Sep 2019 08:01 |
| URI: | https://eprints.lmu.edu.ng/id/eprint/213 |
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