Abstract and keywords
Abstract (English):
We analyzed ionospheric parameters including the critical frequency of the F2 layer (foF2), the peak height of the F2 layer (hmF2), and the scale height at hmF2 (HT) from 2006 to 2012 (ascending phase of solar activity) at Hainan (19.5° N, 109.1° E, MLat. 9.7° N), Irkutsk (52.4° N, 104.3° E, MLat. 42.5° N), and Norilsk (69.2° N, 88.0° E, MLat. 59.8° N) stations (low, middle and high latitudes). We have used manual scaled digisonde ionogram data. Studies of foF2 and hmF2 di-urnal-seasonal variations continue those made earlier for East Asia. Features peculiar for the ascending phase of solar activity are mostly consistent to those for de-scending phase, except for the features of sunset and nighttime hmF2 variations. Features of annual and semi-annual variations recorded by a digisonde agree with those obtained by a satellite occultation and TEC map. We also obtained seasonal, diurnal, annual, and semi-annual variations of the ionospheric parameter HT (scale height at hmF2) from digisonde data, which differ from foF2 variations and hmF2 features.

ionosphere at different latitudes, diurnal-seasonal variations, annual and semi-annual variations, solar activity, ionospheric parameters, East Asian sector.
Publication text (PDF): Read Download

1. Appleton E.V., Naismith R. Some further measurements of upper atmospheric ionization. Proc.e Royal Society of London. Ser. A: Mathematical and Physical Sciences. 1935, vol. 150, iss. 871, pp. 685–708.

2. Bhuyan P.K., Chamua M., Bhuyan K., Subrahmanyam P., Garg S.C. Diurnal, seasonal and latitudinal variation of electron density in the topside F-region of the Indian zone ionosphere at solar minimum and comparison with the IRI. J. Atmos. Solar-Terr. Phys. 2003, vol. 65, pp. 359–368.

3. Bilitza D., Reinisch B.W. International Reference Ionosphere 2007: Improvements and new parameters. Adv. Space Res. 2008, vol. 42, pp. 599–609.

4. Ezquer R.G., Mosert M., Corbella R., Erazu M., Radicella S.M., Cabrera M., de la Zerda L. Day-to-day variability of ionospheric characteristics in the American sector. Adv. Space Res. 2004, vol. 34, pp. 1887–1893.

5. Givishvili G.V., Afinogenov Y.A., Garbatsevich V.A., Leshchenko L.N. Stationary large-scale irregularities of the ionosphere. J. Atmos. Terr. Phys. 1982, vol. 44, no. 11, pp. 923–924.

6. Hunsucker R.D., Hargreaves J. K. The high-latitude ionosphere and its effects on radio propagation. New York: Cambridge University Press, 2003, 613 p.

7. Khmyrov G.M., Galkin I.A., Kozlov A.V., Reinisch B.W., McElroy J., Dozois C. Exploring digisonde ionogram data with SAO-X and DIDBase. 2008, Radio Sounding and Plasma Phys. AIP Conf. Proc. vol. 974, pp. 175–185. DOI: 10.1063/ 1.2885027, 974.

8. Klimenko M.V., Klimenko V.V., Ratovsky K.G., Zakharenkova I.E., Yasyukevich Yu.V., Korenkova N.A., Cherniak Iu.V., Mylnikova A.A. Mid-latitude summer evening anomaly (MSEA) in F2 layer electron density and total electron content at solar minimum. Adv. Space Res. 2015, vol. 56, no. 9, pp. 1951–1960. DOI: 10.1016/ j.asr.2015.07.019.

9. Kohl H, King J.W., Eccles D. Some effects of neutral air winds on the ionospheric F-layer. J. Atmos. Terr. Phys. 1968, vol. 30, no. 10, pp. 1733–1744.

10. Limberger M., Liang W., Schmidt M., Dettmering D., Hugentobler U. Regional representation of F2 Chapman parameters based on electron density profiles. Ann. Geophys. 2013, vol. 31, pp. 2215–2227. DOI: 10.5194/angeo- 31-2215-2013.

11. Qian L.Y., Burns A.G., Solomon S.C., Wang W.B. Annual/semiannual variation of the ionosphere. Geophys. Res. Lett. 2013, vol. 40, no. 10, pp. 1928–1933.

12. Ratovsky K.G., Oinats A.V., Medvedev A.V. Regular features of the polar ionosphere characteristics from digisonde measurements over Norilsk. Adv. Space Res. 2013, vol. 51, no. 4, pp. 545–553.

13. Ratovsky K.G., Shi J.K., Oinats A.V., Romanova E.B. Comparison of diurnal, seasonal and solar cycle variations of high-latitude, mid-latitude and low-latitude ionosphere. Chin. J. Space Sci. 2014, vol. 34, no. 2, pp. 143–153. DOI: 10.11728/ cjss2014.02.143.

14. Reinisch B.W., Galkin I.A., Khmyrov G., Kozlov A., Kitrosser D.F. Automated collection and dissemination of ionospheric data from the digisonde network. Adv. Radio Sci. 2004, vol. 2, pp. 241–247.

15. Rishbeth H. How the thermospheric circulation affects the ionospheric F2-layer. J. Atmos. Solar-Terr. Phys. 1998, vol. 60, no. 14, pp. 1385–1402.

16. Yonezawa T. On the seasonal, non-seasonal and semi-annual variations in the peak electron density of the F2 layer at noon in the equatorial zone. J. Radio Res. Laboratories. 1967, vol. 14, no. 71, pp. 1–25.

17. Yonezawa T. The solar-activity and latitudinal characteristics of the seasonal, non-seasonal and semi-annual variations in the peak electron densities of the F2-layer at noon and at midnight in middle and low latitudes. J. Atmos. Terr. Phys. 1971, vol. 33, pp. 889–907.

18. Yonezawa T., Arima Y. On the seasonal and non-seasonal annual variations and the semi-annual variation in the noon and midnight electron densities of the F2 layer in the middle latitudes. J. Radio Res. Laboratories. 1959, vol. 6, pp. 293–309.

19. Yu T., Wan W., Liu L., Zhao B. Global scale annual and semi-annual variations of daytime NmF2 in the high solar activity years. J. Atmos. Solar-Terr. Phys. 2004, vol. 66, pp. 1691–1701.

20. Zhang M.L., Reinisch B.W, Shi J.K., Wu S.Z., Wang X. Diurnal and seasonal variation of the ionogram-derived scale height at the F2 peak. Adv. Space Res. 2006, vol. 37, no. 5, pp. 967–971.

21. Zhang M.L., Shi J.K., Wang X., Wu S.Z., Zhang S.R. Comparative study of ionospheric characteristic parameters obtained by DPS-4 digisonde with IRI2000 for low latitude station in China. Adv. Space Res. 2004, vol. 33, pp. 869–873.

22. Zhao B., Wan W., Liu L., Mao T., Ren Z., Wang M., Christensen A.B. Features of annual and semiannual variations derived from the global ionospheric maps of total electron content. Ann. Geophys. 2007, vol. 25, pp. 2513–2527.

Login or Create
* Forgot password?