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Solar Activity and Regional Climate

Published online by Cambridge University Press:  18 July 2016

M G Ogurtsov
Affiliation:
A.F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St.-Petersburg, Russia. Email: maxim.ogurtsov@pop.ioffe.rssi.ru.
G E Kocharov
Affiliation:
A.F. Ioffe Physico-Technical Institute of the Russian Academy of Sciences, 194021, Polytechnicheskaya 26, St.-Petersburg, Russia. Email: maxim.ogurtsov@pop.ioffe.rssi.ru.
M Lindholm
Affiliation:
Saima Center for Environmental Sciences, Linnankatu 11, FIN-57130 Savonlinna, Finland
M Eronen
Affiliation:
University of Helsinki, Department of Geology, POB 11, FIN-00014, Helsinki, Finland
Yu A Nagovitsyn
Affiliation:
Central Astronomy Observatory, Pulkovo, 196140, St.-Petersburg, M-140, Russia
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Abstract

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We performed a statistical analysis of the data on summer temperature anomalies in northern Fennoscandia (8–1995 AD) and found that a 70–130-yr cycle is present in this series during most of the time period. A comparison of the reconstructed northern Fennoscandia temperature with different indicators of solar activity (Wolf numbers, the length of solar Schwabe cycle, extended bi-decadal radiocarbon series, and data on sunspots observed by naked eye) shows that the more probable cause of the periodicity is the modulation of regional northern Fennoscandia climate by the long-term solar cycle of Gleissberg. The effect of this century-scale solar modulation of the global Northern Hemisphere temperature is weaker.

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Type
II. Getting More from the Data
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