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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  and
Sven Wedemeyer-Böhm
Olav Kjeldseth-Moe
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway email: [email protected]
Sven Wedemeyer-Böhm
Affiliation:
Institute of Theoretical Astrophysics, University of Oslo, Oslo, Norway email: [email protected]
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Abstract

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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.

Keywords

Earth: global temperatureSun: activity
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S264: Solar and Stellar Variability: Impact on Earth and Planets , August 2009 , pp. 320 - 325
Copyright
Copyright © International Astronomical Union 2010

References

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