Direct transformation of tree-ring measurements into palaeoclimate reconstructions in three-dimensional space

Here we propose a new method for dendroclimatic reconstructions. This DIrect REConstruction Technique (DIRECT) performs modelling of the age-dependent association between climate and growth in three-dimensional space and directly transforms the raw tree-ring values (on the scale of original growth units) into climate variability while considering the effect of age in this relationship. DIRECT was applied to maximum latewood density (MXD) data from Finnish/Swedish Lapland. The new DIRECT reconstruction was compared with a reconstruction produced using regional curve standardization (RCS), a method that is often used to preserve the low-frequency variability in tree-ring proxy data. Comparison of the DIRECT and RCS methods showed that both produced summer temperature reconstructions with approximately equal amounts of low-frequency palaeoclimate information. The DIRECT method avoids traditional detrending techniques by considering the cambial age of each tree when building the statistical climate–proxy model and identifying non-linear relationships between climate and tree growth. DIRECT provides objective consideration and removal of differential growth rates and age-related noise without losing the low-frequency portion of palaeoclimate variability. It is anticipated that DIRECT will prove to be a useful tool in regions where strong climate control enables the use of tree rings for palaeoclimate reconstructions

Algorithm · Climate change · Climatology · Dendrochronology · Dendroclimatology · Geography · Paleoclimatology · Physical geography · Proxy (statistics · Statistics · Tree (set theory · Environmental Science · Geology and Paleoclimatology Research · Mathematics · Plant Water Relations and Carbon Dynamics · Tree-ring climate responses · Geology · Paleontology

• Regional curve standardization

  Open Access•Samuli Helama, Thomas Melvin et al.•The Holocene•2016

  Añadir item

• Dark Ages Cold Period

  Open Access•Samuli Helama, P D Jones et al.•The Holocene•2017

  Añadir item

• Low-frequency patterns in Late-Holocene tree-ring records from northern Fennoscandia

  Open Access•Samuli Helama•The Holocene•2025

  Añadir item

• Reconstruction of Annual Temperature (1590–1979) for Longmire, Washington, Derived from Tree Rings

  Open Access•Lisa J Graumlich, Linda B Brubaker•Quaternary Research•1986

  Añadir item

• A 1000-Year Record of Temperature and Precipitation in the Sierra Nevada

  Open Access•Lisa J Graumlich•Quaternary Research•1993

  Añadir item

• Methods of Dendrochronology

  Open Access•E R Cook, L A Kairiukstis•Methods of Dendrochronology•1990

  Añadir item

• The ‘little ice age’

  John A Matthews, Keith R Briffa•Geografiska Annaler Series A…•2005

  Añadir item

• Abrupt onset of the Little Ice Age triggered by volcanism and sustained by sea‐ice/ocean feedbacks

  Open Access•Gifford H Miller, Áslaug Geirsdóttir et al.•Geophysical Research Letters•2012

  Añadir item

• Volcanic eruptions and climate

  Open Access•Alan Robock•Reviews of Geophysics•2000

  Añadir item

• Low-Frequency Signals in Long Tree-Ring Chronologies for Reconstructing Past Temperature Variability

  Open Access•Jan Esper, Edward R Cook et al.•Science•2002

  Añadir item

• Northern hemisphere temperatures during the past millennium

  Open Access•M Mann, Michael E Mann et al.•Geophysical Research Letters•1999

  Añadir item

• Long-Term Variations of Caloric Insolation Resulting from the Earth's Orbital Elements

  Open Access•André Berger, André L Berger•Quaternary Research•1978

  Añadir item

• Fennoscandian summers from ad 500

  Open Access•Keith R Briffa, P D Jones et al.•Climate Dynamics•1992

  Añadir item

• Global Signatures and Dynamical Origins of the Little Ice Age and Medieval Climate Anomaly

  Open Access•M Mann, Michael E Mann et al.•Science•2009

  Añadir item

• High-resolution palaeoclimatic records for the last millennium

  Open Access•P D Jones, Keith R Briffa et al.•The Holocene•1998

  Añadir item

• Potential bias in ‘updating’ tree-ring chronologies using regional curve standardisation

  Open Access•Thomas Melvin, Thomas M Melvin et al.•The Holocene•2012

  Añadir item

• Little Ice Age' summer temperature variations

  Open Access•Raymond S Bradley, Philip D Jonest•The Holocene•1993

  Añadir item

• The 'segment length curse' in long tree-ring chronology development for palaeoclimatic studies

  Open Access•Edward R Cook, Keith R Briffa et al.•The Holocene•1995

  Añadir item

• Artificial neural networks and dendroclimatic reconstructions

  Open Access•Connie A Woodhouse•The Holocene•1999

  Añadir item

• Orbital Forcing and Tree-Limit History

  Open Access•Leif Kullman•The Holocene•1992

  Añadir item

• Tree-ring width and density data around the Northern Hemisphere

  Open Access•Keith R Briffa, Timothy J Osborn et al.•The Holocene•2002

  Añadir item

• Holocene humidity changes in northern Finnish Lapland inferred from lake sediments and submerged Scots pines dated by tree-rings

  Open Access•Matti Eronen, Hannu Hyvärinen et al.•The Holocene•1999

  Añadir item

• X-ray microdensitometry applied to subfossil tree-rings

  Open Access•Samuli Helama, Matti Vartiainen et al.•Vegetation History and…•2008

  Añadir item