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Influence of micro-site conditions and environmental gradients on tree-ring based climate reconstructions
Responsible organisation
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Tree-ring chronologies are a powerful natural archive to reconstruct summer temperature variations of the late Holocene with an annual resolution. To develop these long-term proxy records tree-ring series are commonly extended back in time by combining samples from living trees with relict dead material preserved onshore or in lakes. Former studies showed that low frequency variations in such reconstructions can be biased if the relict and recent material is from different origins. A detailed analysis of the influence of various ecological (micro-) habitats representing the recent part is required to estimate potential errors in temperature estimates. The application of collective detrending methods, that comprise absolute growth rates, can produce errors in climate reconstructions and results in an underestimation of past temperatures. The appearance of these kind of micro-site effects is a wide-spread phenomenon that takes place all over Fennoscandia. Future research in this key region for dendroclimatology should take this issue into account. Especially the higher climate response at the lakeshore site is interesting to achieve smaller uncertainties when a tree-ring series is transformed to temperature anomalies. For new composite chronologies the main aim should be to minimize potential biases and this includes also micro-site effects.

Place, publisher, year, edition, pages
Mainz: Univ. , 2015.
Keywords [en]
Natural sciences and mathematics, English, Dissertation
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:polar:diva-3980OAI: oai:DiVA.org:polar-3980DiVA, id: diva2:1169053
Available from: 2017-12-22 Created: 2017-12-22 Last updated: 2017-12-22Bibliographically approved

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http://nbn-resolving.org/urn:nbn:de:hebis:77-42194
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CiteExportLink to record
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  • ieee
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Output format
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  • asciidoc
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