Open AccessAtmospheric tides in the ionosphere IV. Studies of the solar tide, and the location of the regions producing the diurnal magnetic variations
Author(s) -
D. F. Martyn
Publication year - 1948
Publication title -
proceedings of the royal society of london. series a, mathematical and physical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.814
H-Index - 135
eISSN - 2053-9169
pISSN - 0080-4630
DOI - 10.1098/rspa.1948.0091
Subject(s) - ionosphere , atmospheric sciences , atmospheric tide , latitude , diurnal temperature variation , variation (astronomy) , amplitude , harmonics , physics , ionization , environmental science , geophysics , thermosphere , astrophysics , astronomy , optics , quantum mechanics , voltage , ion
Solar tidal effects are sought in ionospheric data from representative latitudes. They are found in theE, F 1 andF 2 regions. For theF 2 region the seasonal semi-diurnal harmonics arising fromP 2/3 are comparable with those fromP 2/2 . The amplitudes and phases of these harmonics are determined, and they are used to interpret the global distribution of F2 ionization. Evidence is found that the lunar magnetic variation is produced mainly by currents in theD region of the ionosphere, but is opposed by the corresponding currents in theE andF 1 regions. This finding is submitted to an independent test, using McNish’s evidence of the effects of solar flares on the magnetic variation.