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Oxygen Isotope Ratios from Tree Rings Containing Compression Wood

Published online by Cambridge University Press:  20 January 2017

Brian Luckman  and
John Gray
Brian Luckman
Affiliation:
Department of Geography, University of Western Ontario, London, Ontario, Canada, N6A 5C2
John Gray
Affiliation:
Department of Physics, University of Alberta, Edmonton, Alberta, Canada, T6G 2T1
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Abstract

Oxygen isotope determinations on the α-cellulose of tree rings cut from two leaning Picea engelmannii revealed significant differences between results from normal and compression wood radii. Nine samples (10-year periods) from the normal wood radius (1721–1953) in one tree showed good agreement with proxy climate information and maximum differences of 1.8‰ between the “warmest” and “coolest” decades sampled. Differences of equivalent magnitude were found between samples from the same decade from normal and compression wood radii. These differences are strongly related to the amount and/or density of compression wood present and suggest that sampling for paleoclimatic work should be restricted to complacent, erect trees without compression wood rings.

Type
Articles
Information
Quaternary Research , Volume 33 , Issue 1 , January 1990 , pp. 117 - 121
Copyright
University of Washington

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