Journal article 1475 views
A critical evaluation of multi-proxy dendroclimatology in northern Finland
,
Håkan Grudd,
Risto Jalkanen,
Neil J Loader,
Iain Robertson
Journal of Quaternary Science, Volume: 26, Issue: 1, Start page: 7
Swansea University Authors:
Danny McCarroll, Mary Gagen , Iain Robertson
Full text not available from this repository: check for access using links below.
DOI (Published version): 10.1002/jqs.1408
Abstract
Twentieth-century summer (July-August) temperatures in northern Finland are reconstructed using ring widths, maximum density and stable carbon isotope ratios (delta(13)C) of Scots pine tree rings, and using combinations of these proxies. Verification is based on the coefficient of determination (r(2...
| Published in: | Journal of Quaternary Science |
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| ISSN: | 0267-8179 |
| Published: |
2011
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| Online Access: |
Check full text
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa1009 |
| Abstract: |
Twentieth-century summer (July-August) temperatures in northern Finland are reconstructed using ring widths, maximum density and stable carbon isotope ratios (delta(13)C) of Scots pine tree rings, and using combinations of these proxies. Verification is based on the coefficient of determination (r(2)), reduction of error (RE) and coefficient of efficiency (CE) statistics. Of the individual proxies, delta(13)C performs best, followed by maximum density. Combining delta(13)C and maximum density strengthens the climate signal but adding ring widths leads to little improvement. Blue intensity, an inexpensive alternative to X-ray densitometry, is shown to perform similarly. Multi-proxy reconstruction of summer temperatures from a single site produces strong correlations with gridded climate data over most of northern Fennoscandia. Since relatively few trees are required (<15) the approach could be applied to long sub-fossil chronologies where replication may be episodically low. |
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| College: |
Faculty of Science and Engineering |
| Issue: |
1 |
| Start Page: |
7 |