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Common temperature signal in four well-replicated tree growth series from northern Fennoscandia
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
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2012 (English)In: Journal of Quaternary Science, ISSN 0267-8179, E-ISSN 1099-1417, Vol. 27, no 8, 828-834 p.Article in journal (Refereed) Published
Abstract [en]

Four Nordic temperature proxies based on tree growth at the northern timberline ring-width from Sweden and Finland, maximum latewood density from Sweden, and height increment from Finland were compared. Three indexing methods were used to enhance the low (centennial and above), medium (decadal-to-multidecadal) and high (decadal-to-interannual) frequencies. The proxies are shown to have a strong temperature signal (common variance) at the interannual-to-multidecadal scale, while the multidecadal-to-centennial trends are less coherent, perhaps reflecting intra-regional differences in growing conditions but more likely due to the more noisy regional curve standardization method used to retain the longest trends. Various methods of combining the four proxy series were explored and tested by comparison with four long temperature records from northern Fennoscandia. Only relatively high-frequency, spline-indexed series produced consistently positive verification statistics as a reconstruction model for summer temperature using all four proxies.

Place, publisher, year, edition, pages
2012. Vol. 27, no 8, 828-834 p.
Keyword [en]
Fennoscandia, northern timberline, proxies, tree growth, temperature
National Category
Geosciences, Multidisciplinary
URN: urn:nbn:se:su:diva-83795DOI: 10.1002/jqs.2575ISI: 000311056700008OAI: diva2:578509


Available from: 2012-12-18 Created: 2012-12-14 Last updated: 2013-01-28Bibliographically approved

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Grudd, Håkan
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Department of Physical Geography and Quaternary Geology
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