Palaeoclimate potential of New Zealand Manoao colensoi (silver pine) tree rings using Blue-Intensity (BI) |
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| Affiliation: | 1. School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW, 2052, Australia;2. Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage (CABAH), University of New South Wales, NSW, 2052, Australia;3. Dendrosciences, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Birmensdorf, Switzerland;4. School of Chemistry, University of New South Wales, Sydney, NSW, 2052, Australia;1. Institute of Plant and Animal Ecology, Ural Branch of the Russian Academy of Sciences, 620144, Ekaterinburg, Russia;2. Department of History of the Institute of Humanities, Ural Federal University, 620000, Ekaterinburg, Russia;3. Institute of Ecology, Abkhazian Academy of Sciences, 384900, Sukhum, Abkhazia;1. Dendrology Department, University of Forestry, Sofia, Bulgaria;2. Institute of Geography, Russian Academy of Sciences, Moscow, Russia;1. School of Geography and Geosciences, University of St Andrews, Fife, KY16 9AL, UK;2. Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, 10964, USA;3. The Roslin Institute, University of Edinburgh, Midlothian, EH25 9RG, UK;4. AOC Archaeology Group, Edinburgh, UK;5. Department of Geography, University of Cambridge, Cambridge, UK;6. Swiss Federal Research Institute WSL, Birmensdorf, Switzerland;7. Global Change Research Centre AS CR, Brno, Czechia;8. Department of Environmental Studies, University of Richmond, USA;9. Earth and Environmental Sciences, University of Michigan, USA;10. Department of Earth Sciences, University of Gothenburg, SE-40530, Gothenburg, Sweden;11. Department of Physical Geography, Stockholm University, SE-106 91, Stockholm, Sweden;12. Institute of Geography, University of Innsbruck, Innrain 52, 6020, Innsbruck, Austria;1. Department of Geography, Universität Innsbruck, 6020, Innsbruck, Austria;2. Department of Physical Geography, Stockholm University, 106 91, Stockholm, Sweden;1. School of Geography, Planning and Spatial Sciences, University of Tasmania, Sandy Bay 7005 Australia;2. School of Ecosystem and Forest Sciences, University of Melbourne, Richmond 3121, Australia;3. Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage, University of New South Wales, Sydney 2052, Australia;4. School of Natural Sciences, University of Tasmania, Sandy Bay 7005 Australia |
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| Abstract: | This study investigates if Blue Intensity (BI) parameters are capable of capturing enhanced climatic signals from a key New Zealand dendrochronological species when compared to ring-width (RW) measurements. Three BI parameters (earlywood mean, latewood mean and maximum latewood) recorded generally superior correlations to temperature than conventional RW measurements and these correlations appeared more stable over time. For all BI parameters, austral summer (Dec-Feb) was identified as the strongest reconstructive window. However, all the BI parameters required greater sample replication than RW to reach widely accepted thresholds of chronology reliability, highlighting the need for further examination into the physiological controls on the BI signal. Despite the need for further research, this pilot study is strongly encouraging for the wider application of BI in Southern Hemisphere dendrochronology. |
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| Keywords: | Proxy-climate reconstructions Temperature sensitivity Southern hemisphere climate Wood density |
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