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Are there variations in Earth's global mean temperature related to the solar activity?

Published online by Cambridge University Press:  26 February 2010

Olav Kjeldseth-Moe
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway email: olavm@astro.uio.no
Sven Wedemeyer-Böhm
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway email: sven.wedemeyer-bohm@astro.uio.no
Corresponding
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Abstract

We have analyzed the record of Earth's global temperature variations between 1850 and 2007 looking for signals of periodic variations and compared our results with solar activity variations in the same time period. Significant periods are found at 9.4, 10.6 and 20.9 years. These periodic variations may be caused by solar activity. However, and amazingly enough, we also find at least 17 other significant periodic variations in addition to expected variations with periods of 1 year and of half a year. The result is considered in terms of solar related forcing mechanisms. These may be variable solar heating associated with the small changes in solar irradiance over the solar cycle, or direct effects of interactions between variable magnetic fields carried by the solar wind and particles and fields in interplanetary space or in the Earth's ionosphere.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2010

References

Brohan, P., Kennedy, J. J.., Harris, I., Tett, S. F. B., & Jones, P. D. 2006, Geophys. Res., 111, D12106CrossRefGoogle Scholar
Fröhlich, Claus 2006, Space Science Reviews, 125, 531Google Scholar
Gil-Alana, Luis A. 2009, Solar Phys., 257, 371CrossRefGoogle Scholar
Scafetta, Nicola 2009, arXiv:0908.0792S [astro-ph.SR] 6 Aug 2009Google Scholar
Svensmark, Henrik 2007, Astronomy and Geophysics, 48, 1.18CrossRefGoogle Scholar
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