☆ 4.7 Article

Robotic micromilling of tree-rings: A new tool for obtaining subseasonal environmental isotope records

CHEMICAL GEOLOGY (2008)

期刊

CHEMICAL GEOLOGY

卷 252, 期 1-2, 页码 21-30

出版社

ELSEVIER

DOI: 10.1016/j.chemgeo.2008.01.021

关键词

high-resolution; intra-ring; cellulose; delta O-18; delta C-13; delta D

类别

Geochemistry & Geophysics

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摘要

High-resolution, intra-ring delta O-18, delta D, and delta C-13 values of modem 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 mu m, producing a fine, homogenous powder that facilitates chemical processing and analyses of very small aliquots of alpha-cellulose and cellulose nitrate (similar to 100 mu g). Considerable intra-ring isotope variability observed in tree samples in this study correlates with temperature and precipitation data indicating that intra-ring variability in delta O-18, delta C-13, and delta D has great potential for reconstructing high-resolution variation in meteorological conditions throughout the growing season. (C) 2008 Elsevier B.V. All rights reserved.

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