Dendrochronological Study on Zelkova serrata for Reconstractin the Climate after the Medieval Times

在金鹤里和Zaimokuzaka地区（海拔500 ~ 600 m）共提取了19个核心样品。磁盘样本也从倒下的树木中收集。以这些活树为基础，建立了一个长达229年的年表。如果再加上建筑材料的数据，年代学可以追溯到公元1660年。根据多元回归分析的结果，5月和7月的降水对Zelkova serrata年轮宽度有正影响。为了阐明明治时代以前的气候与日尔科娃年轮宽度之间的关系，本文重点研究了一本古老的日记本，即《Ohkyo Zakki》。这本日记是江户时代最后阶段，即1827年至1859年，由一名Himi镇官员所写

A total of 19 core samples were extracted from the zelkova trees standing in Kanetsuri and Zaimokuzaka (500-600 m msl.) The disk samples were also collected from the fallen trees. A 229 year long ring-width chronology was establish based on these living trees. If the data of the building material are also included, the chronology will go back to A.D.1660sAccording to the result of a multiplo regression analysis, the precipitation in May and July shows the positive effect to the annual-rings width of Zelkova serrata. In order to clarify the relationship between the climate before Meiji era and annual-rings width of Zelkova, an old diary, i.e., "Ohkyo Zakki", was focused. This diary was written by a town official of Himi during the last stage of the Edo period, i.e., from 1827to 1859