Advertisement

Geomagnetic tides and related phenomena

  • Nils Olsen
Atmospheric Tides And Related Phenomena
Part of the Lecture Notes in Earth Sciences book series (LNEARTH, volume 66)

Abstract

Daily variations of the geomagnetic field with amplitudes of about 50 nT at middle latitudes have been known for almost three centuries. Electrical currents in the conducting upper atmosphere are responsible for their main part. They are caused by tidal winds, which are excited by solar heating of the atmosphere as well as by gravitational forces of the moon. In addition, smaller contributions to magnetic variations arise from electrical currents in the magnetosphere, and from tidal currents in the oceans.

Keywords

Solar Activity Interplanetary Magnetic Field Daily Variation Main Field International Reference Ionosphere 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Celsius, A. 1740. Bemerkungen über der Magnetnadel stündliche Veränderungen in ihrer Abweichung. Svenska Vet. Acad. Handl. 296–299.Google Scholar
  2. Chapman, S. and Bartels, J. 1940. Geomagnetism, vol. I+II. Clarendon Press, Oxford.Google Scholar
  3. Chapman, S. and Lindzen, R. S. 1970. Atmospheric tides, thermal and gravitational. Reidel Publ. Comp., Dordrecht.Google Scholar
  4. Gauß, C. F. 1838. Allgemeine Theorie des Erdmagnetismus, Resultate aus den Beobachtungen des magnetischen Vereins im Jahre 1838. Göttingen & Leipzig.Google Scholar
  5. Graham, G. 1724. An Account of Observations Made of the Variation of the Horizontal Needle at London in the Latter Part of the Year 1722 and Beginning 1723. Phil. Trans. Roy. Soc. London. 383: 96–107.Google Scholar
  6. Junge, A. 1988. The telluric field in northern Germany induced by tidal motion in the North Sea. Geophys. J. 95: 523–533.Google Scholar
  7. Kelley, M. C. 1989. The Earth's Ionosphere. Plasma Physics and Electrodynamics. Int. Geophysical Series. 43. Academic Press.Google Scholar
  8. Kreil, K. 1839. Resultate dreijähriger magnetischer Beobachtungen zu Mailand und Einfluss des Mondes darauf. Ann. Physik. 46: 443.Google Scholar
  9. Malin, S. R. C. 1970. Separation of lunar daily variations into parts of ionospheric and oceanic origin. Geophys. J. R. astr. Soc.. 21: 447–455.Google Scholar
  10. Richmond, A. D. 1989. Modeling the Ionospheric Wind Dynamo: A Review. In: Quiet Daily Geomagnetic Fields. W. H. Campbell (ed.). Birkhäuser Verlag, Basel.Google Scholar
  11. Richmond, A. D. 1995. Ionospheric Electrodynamics. In: Handbook of Atmospheric Electrodynamics, Vol. 2. H. Volland (ed.). CRC Press, Boca Raton.Google Scholar
  12. Richmond, A. D. and Roble, R. G. 1987. Electrodynamic Effects of Thermospheric Winds from the NCAR Thermospheric General Circulation Model. J. geophys. Res.. 92: 12365–12376.Google Scholar
  13. Sabine, E. 1853. On the Influence of the Moon on the Magnetic Declination at Toronto, St. Helena and Hobarton. Phil. Trans. Roy. Soc. London. A143: 549–560.Google Scholar
  14. Schuster, A. 1889. The Diurnal Variation of Terrestrial Magnetism. Phil. Trans. Roy. Soc. London. A180: 467–518.Google Scholar
  15. Schuster, A. 1908. The Diurnal Variation of Terrestrial Magnetism. Phil. Trans. Roy. Soc. London. A208: 163–204.Google Scholar
  16. Stewart, B. 1883. Hypothetical Views Regarding the Connection between the State of the Sun and Terrestrial Magnetism. Encyclopedia Britannica. 16: 181–184.Google Scholar
  17. Svalgaard, L. 1973. Polar cap magnetic variations and their relationship with the interplanetary magnetic sector structure. J. geophys. Res. 78: 2064–2078.Google Scholar
  18. Takeda, M. and Maeda, H. 1980. Three-Dimensional Structure of Ionospheric Currents — 1. Currents Caused by Diurnal Tidal Winds. J. geophys. Res. 85: 6895–6899.Google Scholar
  19. Van Bemmelen, W. 1912. Die lunare Variation des Erdmagnetismus. Meteorol. Z. 29: 218–225.Google Scholar

Copyright information

© Springer-Verlag 1997

Authors and Affiliations

  • Nils Olsen
    • 1
  1. 1.Geophysics, Univ. CopenhagenDK-CopenhagenDenmark

Personalised recommendations