Reconstruction of atmospheric radiocarbon concentration of last millennium from East Asian tree rings

2015 Fiscal Year Final Research Report

• Project/Area Number: 25282075
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Cultural assets study and museology
• Research Institution: National Museum of Japanese History
• Principal Investigator: Sakamoto Minoru 国立歴史民俗博物館, 大学共同利用機関等の部局等, 教授 (60270401)
• Co-Investigator(Kenkyū-buntansha): NAKATSUKA Takeshi 総合地球環境学研究所, 研究部, 教授 (60242880)
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 炭素14年代法 / 酸素同位体 / 樹木年輪 / 較正曲線 / 東アジア / セルロース

Outline of Final Research Achievements

Sequential radiocarbon dating of Japanese tree ring which age was determined by dendrochronology and oxygen isotope ratio of cellulose was carried out identity the atmospheric 14C anomalies of Japanese archipelago. Comparing to IntCal13, little anomalies were found during 10c to 12c and 15c. On the other hand, turbulence was observed after 17c. These behavior coincide with wood members of early-modern building which agree well with SHCal13 rather than when applying 14C wiggle-matching method. However, anomaly observed in the latter of 17c does not coincide with previous study. Suess effect should be concerned after 18c.

Free Research Field

文化財科学