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Common temperature signal in four well-replicated tree growth series from northern Fennoscandia
- Lindholm, M. (author)
- Aalto, T. (author)
-
- Grudd, Håkan (author)
- Stockholms universitet,Institutionen för naturgeografi och kvartärgeologi (INK)
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- McCarroll, D. (author)
- Ogurtsov, M. (author)
- Jalkanen, R. (author)
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- (creator_code:org_t)
- 2012-09-19
- 2012
- English.
- In: Journal of Quaternary Science. - : Wiley. - 0267-8179 .- 1099-1417. ; 27:8, s. 828-834
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Multidisciplinär geovetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geosciences, Multidisciplinary (hsv//eng)
Keyword
- Fennoscandia
- northern timberline
- proxies
- tree growth
- temperature
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Lindholm, M.
- Aalto, T.
- Grudd, Håkan
- McCarroll, D.
- Ogurtsov, M.
- Jalkanen, R.
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- NATURAL SCIENCES
- NATURAL SCIENCES
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