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Dendroclimatic potential of dendroanatomy in temperature-sensitive Pinus sylvestris

Journal article
Authors Jesper Björklund
Kristina Seftigen
Patrick Fonti
Daniel Nievergelt
Georg von Arx
Published in Dendrochronologia
Volume 60
ISSN 11257865
Publication year 2020
Published at Department of Earth Sciences
Language en
Keywords Maximum latewood density (MXD), Northern Fennoscandia, Pinus sylvestris, Quantitative wood anatomy, Temperature reconstruction, Tree-ring anatomy
Subject categories Earth and Related Environmental Sciences


© 2020 The Authors The most frequently and successfully used tree-ring parameters for the study of temperature variations are ring width and maximum latewood density (MXD). MXD is preferred over ring width due to a more prominent association with temperature. In this study we explore the dendroclimate potential of dendroanatomy based on the first truly well replicated dataset. Twenty-nine mature living Pinus sylvestris trees were sampled in North-eastern Finland at the cool and moist boreal forest zone, close to the latitudinal tree line, where ring width, X-ray MXD as well as the blue intensity counterpart MXBI were compared with dendroanatomical parameters. Maximum radial cell wall thickness as well as anatomical MXD and latewood density appeared to be the most promising parameters for temperature reconstruction. In fact, these parameters compare favorably to MXD derived from X-ray techniques as well as MXBI, in terms of shared variation and temperature correlations across frequencies and over time. The reasons for these results are thought to be the unprecedentedly high measurement resolution of the anatomical technique, which provide the optimal resolution – the cell – whereas X-ray techniques have a slightly lower resolution and BI techniques even lower. While the results of this study are encouraging, further tests on longer and multigenerational chronologies are required to more generally and fully assess the dendroclimate potential of anatomical parameters.

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