Open AccessLunar tide in the equatorial F region vertical ion drift velocity
Author(s) -
Stening Robert J.,
Fejer Bela G.
Publication year - 2001
Publication title -
journal of geophysical research: space physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.67
H-Index - 298
eISSN - 2156-2202
pISSN - 0148-0227
DOI - 10.1029/2000ja000175
Subject(s) - amplitude , atmospheric tide , atmospheric sciences , solar maximum , geology , variation (astronomy) , geodesy , solar cycle , phase (matter) , ionosphere , thermosphere , physics , geophysics , solar wind , astrophysics , magnetic field , optics , quantum mechanics
Vertical ion drift velocity data from Jicamarca have been analyzed for a lunar semidiurnal tide using a least squares fitting method. Amplitudes of up to 6 m s −1 are obtained with phases in agreement with lunar tidal determinations of other associated physical parameters. Variations between season, solar activity, and day to night are also examined. Generally, amplitudes are larger in the southern summer. Much of the phase variation with season is very similar for solar maximum and minimum years. There is a summer to winter phase change that is most distinct at solar maximum nighttime. A day‐to‐night phase reversal can also been seen in some seasons. Hints of this are also found in the lunar tide in the F region height and in the magnetic variations at Huancayo.