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The supra-long Scots pine tree-ring record for Finnish Lapland: Part 2, interannual to centennial variability in summer temperatures for 7500 yearsDepartment of Geology, PO Box 64, FIN-00014 University of Helsinki, Finlandsamuli.helamaKhelsinki.fi
Finnish Forest Research Institute, PO Box 16, FIN-96301 Rovaniemi, Finland
Saima Centre for Environmental Sciences, University of Joensuu, Linnankatu 11, FIN-57130 Savonlinna, Finland
Department of Geology, PO Box 64, FIN-00014 University of Helsinki, Finland Midsummer (July) temperatures are reconstructed for the last 7500 years using the long ring-width chronology of Scots pine (Pinus sylvestris L.) from northern Finland. The chronology was built using regional curve standardization (RCS), which allows for long-term (low-frequency) variability to be extracted from this annually resolved record of 1087 samples from living trees and subfossil timber. Short-and long-term changes in reconstructed July temperatures are presented. The regression model accounts for 37% of the dependent instrumental temperature variance between ad 1879 and 1992. The warmest 30-year periods were ad 560–531, ad 560–531, 1190–1161 bc and ad 1541–1570, and the coldest 5240–5211, 5150–5121 and 3710–3681 bc. The warmest 100-year periods were ad 1501–1600, 600–501 bc and 300–201 bc, and the coldest 5200–5101, 2500–2401 and 1500–1401 bc. Broad comparisons are made with dendrochronological, lacustrine and glacial proxy evidence.
Key Words: Dendroclimatology • tree rings • summer temperature • Pinus sylvestris • Finnish Lapland • Holocene
The Holocene, Vol. 12, No. 6,
681-687 (2002) This article has been cited by other articles:
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