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Advances towards improved low-frequency tree-ring reconstructions, using an updated Pinus sylvestris L. MXD network from the Scandinavian Mountains

Journal article
Authors Jesper Björklund
Björn Gunnarson
Paul Krusic
Håkan Grudd
Torbjörn Josefsson
Lars Östlund
Hans W. Linderholm
Published in Theoretical and Applied Climatology
Volume 113
Issue 3-4
Pages 697-710
Publication year 2013
Published at Department of Earth Sciences
Pages 697-710
Language en
Links dx.doi.org/10.1007/s00704-012-0787-...
Subject categories Climate Research

Abstract

The dendrochronological use of the parametermaximum density (MXD) in Pinus Sylvestris L., at high latitudes, has provided valuable insights into past summer temperature variations. Few long MXD chronologies, from climatically coherent regions, exist today, with the exception being in northern Europe. Five, 500-year-long, Fennoscandian, MXD chronologies were compared with regard to their common variability and climate sensitivity. They were used to test Signal-free standardization techniques, to improve inferences of low-frequency temperature variations. Climate analysis showed that, in accordance with previous studies on MXD in Fennoscandia, the summer temperature signal is robust (R2>50 %) and reliable over this climatically coherent region. A combination of Individual standardization and regional curve standardization is recommended to refine long-term variability from these MXD chronologies and relieve problems arising from low replication and standardization end-effects.

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