~(14)C MEASUREMENTS OF TREE RINGS OF A JAPANESE CEDAR DURING 1945 TO 2000 AND CORE SAMPLING FOR ENVIRONMENTAL STUDIES

摘要

Japanese cedar rings sampled from Aomori Prefecture, Japan, were measured to obtain tree-ring radiocarbon data covering a period of the latter half of the 20th century in the northernmost area of Honshu (mainland Japan), to obtain records of variation in atmospheric ~(14)C concentration caused by past atmospheric nuclear testing, and to study any possible local effects. This work, carried out on a partial disk, was also intended to provide a reference for data obtained by core sampling of live, standing Japanese black pines as a part of marine environmental studies.