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

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• 作者：Justin P. Dodd ; William P. Patterson ; Chris Holmden ; Jason M. Brasseur
• 关键词：High-resolution ; Intra-ring ; Cellulose ; δ ; p>18p>O ; δ ; p>13p>C ; δ ; D
• 刊名：Chemical Geology
• 出版年：2008
• 出版时间：30 June 2008
• 年：2008
• 卷：252
• 期：1-2
• 页码：21-30
• 全文大小：846 K

文摘

High-resolution, intra-ring δp>18p>O, δD, and δp>13p>C 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 p://www.sciencedirect.com/scidirimg/entities/204e.gif"" alt=""greek small letter alpha"" title=""greek small letter alpha"" border=""0"">-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 δp>18p>O, δp>13p>C, and δD has great potential for reconstructing high-resolution variation in meteorological conditions throughout the growing season.