Articles | Volume 36, issue 6
Ann. Geophys., 36, 1545–1562, 2018

Special issue: Dynamics and interaction of processes in the Earth and its...

Ann. Geophys., 36, 1545–1562, 2018

Regular paper 23 Nov 2018

Regular paper | 23 Nov 2018

On the variability of the semidiurnal solar and lunar tides of the equatorial electrojet during sudden stratospheric warmings

Tarique A. Siddiqui et al.

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T. A. Siddiqui, H. Lühr, C. Stolle, and J. Park
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Cited articles

Alken, P. and Maus, S.: Spatio-temporal characterization of the equatorial electrojet from CHAMP, Ørsted, and SAC-C satellite magnetic measurements, J. Geophys. Res.-Space, 112, A09305,, 2007. a
Andrews, D. G., Holton, J. R., and Leovy, C. B.: Middle atmosphere dynamics, 40, Academic press, 1987. a
Baker, W. and Martyn, D. F.: Electric currents in the ionosphere-The conductivity, Philos. T. R. Soc. Lond. S-A, 246, 281–294, 1953. a
Bartels, J. and Johnston, H.: Geomagnetic tides in horizontal intensity at Huancayo, Terrestrial Magnetism and Atmospheric Electricity, 45, 269–308,, 1940. a, b
Chandran, A. and Collins, R. L.: Stratospheric sudden warming effects on winds and temperature in the middle atmosphere at middle and low latitudes: a study using WACCM, Ann. Geophys., 32, 859–874,, 2014. a
Short summary
Extreme meteorological events such as SSWs induce variabilities in the ionosphere by modulating the atmospheric tides, and these variabilities can be comparable to a moderate geomagnetic storm. The equatorial electrojet (EEJ) is a narrow ribbon of current flowing over the dip equator in the ionosphere and is particularly sensitive to tidal changes. In this study, we use ground-magnetic measurements to investigate the semidiurnal solar and lunar tidal variabilities of the EEJ during SSWs.