Geomagnetism and Aeronomy

, Volume 58, Issue 8, pp 1029–1036 | Cite as

Halistatt Cycle Subarctic Fennoscandian Temperature and Its Possible Link with Solar Activity

  • M. G. OgurtsovEmail author
  • S. Helama


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.



M.G. Ogurtsov expresses his thanks to the program of the Presidium of RAS no. 7, and to RFBR grants 16-02-00090, 18-02-00583 for financial support. Tree-ring analyses were prepared under the support of the Academy of Finland (no. 251441).


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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.Ioffe Physico-Technical InstituteSt. PetersburgRussia
  2. 2.Central Astronomical observatory at PulkovSt. PetersburgRussia
  3. 3.Natural Resources Institute FinlandRovaniemiFinland

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