IBIS-Flora

Angiosperm Flora of India

Blue Intensity In Pinus sylvestris Tree Rings: A Manual for A New Palaeoclimate Proxy

Publication Type:Journal Article
Year of Publication:2011
Authors:Campbell, R, McCarroll, D, Robertson, I, Loader, NJ, Grudd, H, Gunnarson, B
Journal:Tree-Ring Research
Volume:67
Issue:2
Date Published:2011
ISBN Number:1536-1098
Keywords:Pinus
Abstract:

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.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.

URL:http://dx.doi.org/10.3959/2010-13.1
Short Title:Tree-Ring Research
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