Journal of Geophysical Research: Space PhysicsVolume 103, Issue A11 p. 26759-26762 CommentariesFree Access Comment on “Ionospheric F2 layer seasonal and semiannual variations” by G. H. Millward, H. Rishbeth, T. J. Fuller-Rowell, A. D. Aylward, S. Quegan, and R. J. Moffett Chaman-Lal, Chaman-LalSearch for more papers by this author Chaman-Lal, Chaman-LalSearch for more papers by this author First published: 01 November 1998 https://doi.org/10.1029/98JA02652Citations: 1AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL References Bartels, J., A. Romana, J. Veldkamp, Geomagnetic data 1958 indices K and C. Distributor, North-Holland Publishing Co., Amsterdam, 1962. Bartels, J., Eine universelle tagsperiode der erdmagnetischen Aktivitat, Meteorol. Z., 42, 147– 152, 1925. Chaman-Lal, Global F2 layer ionization and geomagnetic activity, J. Geophys. Res., 97, 12153– 12159, 1992. Chaman -Lal, Correlation between the seasonal trends of planetary F2 layer ion density and intensity of the ring current, J. Atmos. Terr. Phys., 57, 45– 49, 1995. Chaman-Lal, Seasonal trend of geomagnetic activity derived from solar terrestrial geometry confirms an axial-equinoctial theory and reveals deficiency in planetary indices, J. Atmos. Terr. Phys., 58, 1497– 1506, 1996a. Chaman-Lal, Development of a physically meaningful global model of the critical frequency of the F2 layer of the ionosphere: Mark 1, Part 1Ionospheric Effects SymposiumOffice of Naval ResearchOld Town, Alexandria, Va.May 7–9, 1996b. Chaman-Lal, Contribution to F2 layer ionization due to the solar wind, J. Atmos. Solar Terr. Phys., 59, 2203– 2211, 1997. Chaman-Lal, Solar wind and equinoctial maxima in geophysical phenomena, J. Atmos. Solar Terr. Phys., 80, 1017– 1024, 1998. Cook, G. E., Diana W. Scott, Exospheric densities near solar minimum derived from the orbit of ECHO 2, Planet. Space Sci., 14, 1149– 1165, 1966. Cook, G. E., The large semi-annual variation in exospheric density: A possible explanation, Planet. Space Sci., 15, 627– 632, 1967. Cook, G. E., Semi-annual variation at a height of 90 km, Nature, 222, 969– 971, 1969. Cortie, A. L., Sunspots and terrestrial magnetic phenomena, 1898–1911, Mon. Not. Roy. Astron. Soc., 73, 52– 60, 1911. Fuller-Rowell, T. J., The thermospheric spoon: A mechanism for the semi-annual density variation, J. Geophys. Res., 103, 3951, 1998. Jacchia, L. G., Electromagnetic and corpuscular heating of the upper atmosphere, Space Res., III, 3– 18, 1963. Millward, G. H., H. Rishbeth, T. J. Fuller-Rowell, A. D. Aylward, S. Quegan, R. J. Moffett, Ionospheric F2 layer seasonal and semiannual variations, J. Geophys. Res., 101, 5149– 5156, 1996. Paetzold, H. K., Corpuscular heating of the upper atmosphere, J. Geophys. Res., 67, 2741– 2744, 1962. Paetzold, H. K., Solar activity effects in the upper atmosphere deduced from satellite observations, Space Res., III, 28– 52, 1963. Wyatt, S. P., Principles of Astronomy 2nd ed., 60– 62, Allyn and Bacon, Boston, Mass., 1971. Citing Literature Volume103, IssueA111 November 1998Pages 26759-26762 ReferencesRelatedInformation