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Centennial-to-millennial fluctuations in July temperatures in north Finland as recorded by timberline tree rings of Scots pine

Auteurs :
OGURTSOV, M.
HELAMA, S.
ERONEN, M.
LINDHOLM, M.

Description :
A tree-ring proxy of summer temperature anomalies for northern Finland for the past 7500 yr was analyzed using Fourier spectrum and wavelet approaches. Multicentennial (250-450 yr) variability is present in the proxy record during most of the time range. This variability is suggested to reflect low-frequency variability in the North Atlantic Oscillation. Century-scale (90-130 yr) variation is another important feature of the tree-ring proxy data during the Holocene and may be attributed to Glessberg solar activity variations. In addition, a 2000-yr quasi-period is found in this temperature proxy data, similar to the millennial-scale variability present in records from the North Atlantic region.


Type de document :
Article de périodique

Source :
Quaternary research, issn : 0033-5894, 2005, vol. 63, n°. 2, p. 182-188, nombre de pages : 7, Collation : Illustration, Références bibliographiques : 41 ref.

Date :
2005

Editeur :
Pays édition : Etats-Unis, San Diego, CA, Elsevier

Langue :
Anglais
Droits :
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