Affiliation:
1. Pushkov Institute of Terrestrial Magnetism, Ionosphere and Radiowave Propagation RAS
Abstract
Using data from ground-based vertical sounding of the ionosphere (VS) at the station Moscow and five Japanese stations for the period from 1969 to 2015, we have examined the long-term response of the E layer to solar X-ray flares. The analysis relies on the previously developed method for estimating the ratio between rates of ionization by X-rays qx and ultraviolet radiation qu during flares. We confirmed the existence of a long-term (at least covering the 45-year observation period) increase in the proportion of X-rays in the total ionization rate of the ionospheric E layer, characterized by the ratio qx/q, where q=qx+q. The qx/q ratio is shown to increase throughout the period of interest at a rate independent of the solar activity cycle. There is also no dependence of the qx/q trend rate on the season, latitude (26°–56° N), and longitude (37°–28° E).
Publisher
Infra-M Academic Publishing House
Subject
Space and Planetary Science,Atmospheric Science,Geophysics
Reference17 articles.
1. Beynon W.L.G., Brown G.M. Geomagnetic distortion of region-E. J. Atmos. Terr. Phys. 1959, vol. 14, iss. 1-2, pp. 138–166. DOI: 10.1016/0021-9169(59)90062-5., Beynon W.L.G., Brown G.M. Geomagnetic distortion of region-E. J. Atmos. Terr. Phys. 1959, vol. 14, iss. 1-2, pp. 138–166. DOI: 10.1016/0021-9169(59)90062-5.
2. Bilitza D. International Reference Ionosphere — Status 1995/96. Adv. Space Res. 1997, vol. 20, no. 9. pp. 1751–1754. DOI: 10.1016/S0273-1177(97)00584-X., Bilitza D. International Reference Ionosphere — Status 1995/96. Adv. Space Res. 1997, vol. 20, no. 9. pp. 1751–1754. DOI: 10.1016/S0273-1177(97)00584-X.
3. Bremer J. Ionospheric trends in mid-latitude as a possible indicator of the atmospheric greenhouse effect. J. Atmos. Terr. Phys. 1992, vol. 54, no. 11-12, pp. 1505–1511. DOI: 10.1016/ 0021-9169(92)90157-G., Bremer J. Ionospheric trends in mid-latitude as a possible indicator of the atmospheric greenhouse effect. J. Atmos. Terr. Phys. 1992, vol. 54, no. 11-12, pp. 1505–1511. DOI: 10.1016/ 0021-9169(92)90157-G.
4. Brown W.J.G., Wynne R. Solar daily disturbance variation in the lover ionosphere. Planet. Space Sci. 1967, vol. 15, iss. 11, pp. 1677–1686. DOI: 10.1016/0021-9169(92)90157-G., Brown W.J.G., Wynne R. Solar daily disturbance variation in the lover ionosphere. Planet. Space Sci. 1967, vol. 15, iss. 11, pp. 1677–1686. DOI: 10.1016/0021-9169(92)90157-G.
5. Fatkullin M.N., Zelenova T.I., Kozlov V.K., Legenka A.D., Soboleva T.N. Empirical models of the mid-latitude ionosphere. M.: Science, 1981, 255 p. (In Russian)., Fatkullin M.N., Zelenova T.I., Kozlov V.K., Legenka A.D., Soboleva T.N. Empirical models of the mid-latitude ionosphere. M.: Science, 1981, 255 p. (In Russian).
Cited by
5 articles.
订阅此论文施引文献
订阅此论文施引文献，注册后可以免费订阅5篇论文的施引文献，订阅后可以查看论文全部施引文献