Article ID Journal Published Year Pages File Type
4700510 Chemical Geology 2008 10 Pages PDF
Abstract

High-resolution, intra-ring δ18O, δD, and δ13C values of modern tree species (Picea glauca, Larix laricina, and Populus grandidentata) were obtained using a robotic micromill. The micromilling apparatus permits accurate mapping and sampling of growth bands at a resolution of a few μm, producing a fine, homogenous powder that facilitates chemical processing and analyses of very small aliquots of α-cellulose and cellulose nitrate (~ 100 μg). Considerable intra-ring isotope variability observed in tree samples in this study correlates with temperature and precipitation data indicating that intra-ring variability in δ18O, δ13C, and δD has great potential for reconstructing high-resolution variation in meteorological conditions throughout the growing season.

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Physical Sciences and Engineering Earth and Planetary Sciences Geochemistry and Petrology
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