Relationship between δ^(13)C and index of ring width  

作　　者：WANG Shilu, WAN Guojiang and AN Ning State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 

出　　处：《Chinese Science Bulletin》1999年第S2期81-83,共3页

摘　　要：1 Materials and methods THE tree-ring reported here is one of pine discs sampled at 3 200 m a.s.l. in Qongtelian Valley in the Tuomu’er Peak region in 1978. The local geographical and climate condition has been introduced in detail. An index series was obtained after the width of tree-rings on 5 different radii was measured andfitted by linear and negative exponential functional regression. Each annual ring has been separated on the whole to simultaneously measure △¹⁴ C and δ¹³ C of treerings. Cellulose was extracted by the standard chemical method, then oxidized by copper oxide to C0₂.Carbon isotopic analyses were performed with a Mat-252 mass spectrometer. Results are expressed in thestandard δ notation with respect to the PDB standard with a precision of 0.1‰. 2

关 键 词：TREE RINGS δ¹³C INDEX of RING WIDTH correlation CLIMATE changes. 

分 类 号：P593[天文地球—地球化学]