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1 July 2011 Blue Intensity In Pinus sylvestris Tree Rings: A Manual for A New Palaeoclimate Proxy
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Abstract

Minimum blue intensity is a reflected light imaging technique that provides an inexpensive, robust and reliable surrogate for maximum latewood density. In this application it was found that temperature reconstructions from resin-extracted samples of Pinus sylvestris (L.) from Fennoscandia provide results equivalent to conventional x-ray densitometry. This paper describes the implementation of the blue intensity method using commercially available software and a flat-bed scanner. A calibration procedure is presented that permits results obtained by different laboratories, or using different scanners, to be compared. In addition, the use of carefully prepared and chemically treated 10-mm-diameter cores are explored; suggesting that it may not be necessary to produce thin laths with the rings aligned exactly perpendicular to the measurement surface.

Rochelle Campbell, Danny McCarroll, Iain Robertson, Neil J. Loader, Håkan Grudd, and Björn Gunnarson "Blue Intensity In Pinus sylvestris Tree Rings: A Manual for A New Palaeoclimate Proxy," Tree-Ring Research 67(2), (1 July 2011). https://doi.org/10.3959/2010-13.1
Received: 6 December 2010; Accepted: 1 April 2011; Published: 1 July 2011
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