Earth, Planets and Space

, Volume 56, Issue 9, pp e25–e28 | Cite as

An interhemispheric comparison of the geomagnetic activity signature in the lower atmosphere

Open Access
E-Letter

Abstract

The geomagnetic activity signature in the southern hemisphere atmospheric circulation is examined and the results are compared to those of Palamara and Bryant (2004) and other researchers for the northern hemisphere. Sliding correlations are used with monthly data to identify temporal and seasonal aspects of a potential relationship between solar modulated geomagnetic activity and the southern annular mode, while the geomagnetic activity signature in both hemispheres is compared in zonal-mean zonal wind data. The results reveal that apart from a suggestive, but inconclusive, relationship between the geomagnetic AA index and an index of the southern annular mode in March, there is no evidence for a geomagnetic activity signature in the southern hemisphere troposphere.

Key words

Meterology and atmospheric dynamics (general circulation, climatology) 

References

  1. Boberg, F. and H. Lundstedt, Solar wind variations related to fluctuations of the North Atlantic Oscillation, Geophys. Res. Lett., 29(15), 1718, 10.1029/2002/GL014903, 2002.CrossRefGoogle Scholar
  2. Bucha, V. and V. Bucha, Geomagnetic forcing of changes in climate and in the atmospheric circulation, J. Atmos. Solar-Terr. Phys., 60, 145–169, 1998.CrossRefGoogle Scholar
  3. Christiansen, B., Evidence for nonlinear climate change: Two stratospheric regimes and a regime shift, Journal of Climate, 16(22), 3681–3689, 2003.CrossRefGoogle Scholar
  4. Herschel, W., Observations tending to investigate the nature of the sun, in order to find the causes or symptoms of its variable emission of light and heat; with remarks on the use that may be possibly drawn from solar observations, Phil. Trans. Royal Soc. (London) Part 1, 265–318, 1801.Google Scholar
  5. Kalnay, E., M. Kanamitsu, R. Kistler, W. Collins, D. Deaven, L. Gandin, Iredell, S. Saha, G. White, J. Woollen, Y. Zhu, M. CHelliah, W. Ebisuzaki, W. Higgins, J. Janowiak, K. C. Mo, C. Repelewski, J. Wang, A. Leetmaa, R. Reynolds, R. Jenne, and D. Jospeh, The NCEP/NCAR 40-year reanalysis project, Bull. Am. Meteorological Soc., 77, 437–471, 1996.CrossRefGoogle Scholar
  6. Mayaud, P.-N., The aa indices: A 100-year series characterizing the magnetic activity, J. Geophys. Res., 77, 6870–6874, 1972.CrossRefGoogle Scholar
  7. Palamara, D. R. and E. A. Bryant, Geomagnetic activity forcing of the Northern Annular Mode via the stratosphere, Ann. Geophys., 22, 725–731, 2004.CrossRefGoogle Scholar
  8. Slonosky, V. C., P. D. Jones, and T. D. Davies, Variability of the surface atmospheric circulation over Europe 1774–1995, International Journal of Climatology, 20, 1875–1897, 2000.CrossRefGoogle Scholar
  9. Tennant, W., Considerations when using pre-1979 NCEP/NCAR reanalyses in the southern hemisphere, Geophys. Res. Lett., 31(11), L11112, doi:10.1029/2004GL019751, 2004.CrossRefGoogle Scholar
  10. Thejll, P., B. Christiansen, and H. Gleisner, On correlations between the North Atlantic Oscillation, geopotential heights, and geomagnetic activity, Geophys. Res. Lett., 30, 81–84 (doi:10.1029/2002GL016598), 2003.CrossRefGoogle Scholar

Copyright information

© The Society of Geomagnetism and Earth, Planetary and Space Sciences (SGEPSS); The Seismological Society of Japan; The Volcanological Society of Japan; The Geodetic Society of Japan; The Japanese Society for Planetary Sciences. 2004

Authors and Affiliations

  1. 1.School of GeosciencesUniversity of WollongongAustralia

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