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Six Temperature Proxies of Scots Pine from the Interior of Northern Fennoscandia Combined in Three Frequency Ranges
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2014 (English)In: Journal of Climatology, Vol. 2014Article in journal (Refereed) Published
Abstract [en]

Six chronologies based on the growth of Scots pine from the inland of Northern Fennoscandia were built to separately enhance low, medium, and high frequencies in 1000–2002. Several periodicities of growth were found in common in these data. Five of the low-frequency series have a significant oscillatory mode at 200–250 years of cycle length and most series have strong multidecadal scale variability, i.e. significant peaks at 33, 67, or 83–125 years. Reconstruction models for mean July and June–August as well as three longer period temperatures were built and compared using stringent verification statistics. We describe main differences in model performance (explained variance from 0.53 to 0.62) between individual proxies as well as their various averages depending on provenance and proxy type, length of target period, and frequency range. In addition, a separate medium-frequency chronology is presented. This series is closely similar in amplitude and duration to the Atlantic multidecadal oscillation (AMO). The good synchrony between these two series is only hampered by a 10-year shift in timing. Recognizing a strong medium-frequency component in Fennoscandian climate proxies helps to explain part of the uncertainties in their 20th century trends.

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Hindawi Publishing Corporation, 2014. Vol. 2014
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Natural Sciences
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URN: urn:nbn:se:polar:diva-4176DOI: 10.1155/2014/578761OAI: oai:DiVA.org:polar-4176DiVA: diva2:1172256
Available from: 2018-01-09 Created: 2018-01-09 Last updated: 2018-01-09

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  • apa
  • harvard1
  • ieee
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  • de-DE
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  • nn-NB
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  • Other locale
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Output format
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  • asciidoc
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