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Possible traces of solar activity effect on the surface air temperature of mid-latitudes

Published online by Cambridge University Press:  26 February 2010

Ali Kilcik
Department of Physics, Faculty of Science, Akdeniz University, 07058 Antalya, Turkey email:
Atila Özgüç
Kandilli Observatory and E.R.I., Bogazici University, Cengelkoy, 34684 Istanbul, Turkey email:
Jean-Pierre Rozelot
OCA-Fizeau Dpt, CNRS UMR 6525, & Université de Nice-Sophia-Antipolis, Av. Copernic, 06130 Grasse, France email:
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In this study we investigate the effects of solar activity on the surface air temperature of mid-latitudes. This enables us to understand existence of solar activity effects on the temperature. We used surface air temperature and pressure data as climate parameters, and solar flare index data as solar activity indicator, for the 25 - 50 degree longitude and 30 - 70 degree latitude zone, including Turkey and European part of Russia. We considered the parameters temperature, pressure and flare index data for the period ranging from January 1975 to the end of December 2007, which covers almost three solar cycles, namely 21st, 22nd, and 23rd. We found some significant correlations between solar activity and surface air temperature for cycles 22 and 23 for some zones. We applied multitaper method to obtain the cyclic behavior of surface air temperature data sets. The most pronounced power peaks were found by this transform around 1.2 and 2.5 years which were reported earlier for some solar activity indicators. We concluded that signature of solar activity effect exists on surface air temperature of mid-latitudes where we studied.

Contributed Papers
Copyright © International Astronomical Union 2010


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