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Solar-climatic correlations were examined over the timescales, corresponding to solar cycles of Schwabe, Hale and Gleissberg, during the last 3–4 centuries using eight proxy and direct indices of: (a) summer climate in Fennoscandia, (b) sea surface temperature in the North Atlantic and (c) solar activity. Using novel and improved data records new evidences of a link between solar activity, North Atlantic sea surface temperature and summer temperature in Northern Fennoscandia were obtained. No solar footprint was found in the temperature proxy from East Finland. The results show that this relationship is rather complex and varies depending on the timescale considered and also varies regionally. [ABSTRACT FROM AUTHOR]

Abstract: Reconstruction of summer temperature at subarctic Fennoscandia (68°-70° N, 20°-30° E), based on tree-ring data, was compared with three solar activity reconstructions, obtained by means of 14C and 10Be. It was shown that temperature proxy reconstructs well both long-term and short-term temperature variability. Weak, but significant positive correlation between reconstructed temperature (Helama et al., 2010) averaged over 40 years, and solar proxies was found during BC 5495-AD 1895. It was shown that Hallstatt cyclicity (1800-2300 years) is the main common feature in temperature and solar proxies. Possible mechanisms of the solar-temperature link over subarctic Fennoscandia are discussed. [ABSTRACT FROM AUTHOR]