@article{oai:nagoya.repo.nii.ac.jp:00014600,
 author = {菱沼, 卓也 and 南, 雅代 and 伊藤, 公一 and 大園, 亨司 and HISHINUMA, Takuya and MINAMI, Masayo and ITO, Koichi and OSONO, Takashi},
 journal = {名古屋大学加速器質量分析計業績報告書},
 month = {Mar},
 note = {Coarse woody debris (CWD) include large woody litter such as boles, snags, and stumps and are major components of organic carbon in forest ecosystems, accounting for more than 40% of the aboveground biomass in some forests. In the present study, we develop a new method using radiocarbon dating to estimate the dead year and decomposition rates of CWD. The method merits the estimation of dead year for bulk CWD samples that are either drilled or excised as a disk. We establish mathematical models that incorporate the diameter of sample, allometric relationship between diameter and tree age, and background values of atmospheric 14CO2 concentration to construct reference curves for the estimated 14C values of bulk CWD sample with respect to the dead year. We verified the accuracy of this method by measuring Δ14C values for five CWD samples (diameter of 20-23 cm, dead year known or unknown) collected in a subalpine forest in central Japan and comparing the estimated values of dead years and decomposition rates with those previously observed., 第23回名古屋大学年代測定総合研究センターシンポジウム平成22(2010)年度報告},
 pages = {72--81},
 title = {14C測定による粗大枯死材の枯死年および分解速度の推定},
 volume = {22},
 year = {2011}
}