An advancement in removing extraneous color from wood for low-magnification reflected-light image analysis of conifer tree rings

Paul Sheppard, Alex Wiedenhoeft

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This paper describes the removal of extraneous color from increment cores of conifers prior to reflected-light image analysis of tree rings. Ponderosa pine in central New Mexico was chosen for study. Peroxide bleaching was used as a pretreatment to remove extraneous color and still yield usable wood for image analysis. The cores were bleached in 3% peroxide raised to pH 12 and heated to 60° C, and then they were soaked in 95% ethanol and rinsed in water. The cores were dried slowly to avoid checking or cracking. This treatment removed heartwood color while leaving the wood reasonably sound. Wood reflectance and latewood width were measured using reflected-light image analysis. For dendroclimatic modeling, best-subsets regression was used to determine the strongest predictive model, which was May-September rainfall using latewood reflectance and latewood width. The ability to dendroclimatically model and reconstruct summer precipitation is contingent on having latewood reflectance (density) measurements, and reconstructing summer precipitation in the Southwest will enhance paleoclimatology of the region. Image analysis with reflected white light is thus closer to being more widely applicable in dendrochronology.

Original languageEnglish (US)
Pages (from-to)173-183
Number of pages11
JournalWood and Fiber Science
Volume39
Issue number1
StatePublished - Jan 2007

Fingerprint

latewood
growth rings
tree ring
image analysis
Image analysis
conifers
coniferous tree
Wood
reflectance
Color
color
Peroxides
peroxides
paleoclimatology
dendrochronology
decolorization
summer
heartwood
Pinus ponderosa
cracking

Keywords

  • Dendrochronology
  • Image analysis
  • New Mexico
  • Summer precipitation
  • Wood color

ASJC Scopus subject areas

  • Forestry
  • Chemical Engineering (miscellaneous)
  • Plant Science
  • Materials Science (miscellaneous)

Cite this

An advancement in removing extraneous color from wood for low-magnification reflected-light image analysis of conifer tree rings. / Sheppard, Paul; Wiedenhoeft, Alex.

In: Wood and Fiber Science, Vol. 39, No. 1, 01.2007, p. 173-183.

Research output: Contribution to journalArticle

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