Establishment of 1000-year long Kiso hinoki tree-ring chronology and the reconstruction of the past climate for Central Japan

研究人员利用日本白木活树的年轮宽度数据对日本中部地区的树木气候学研究结果进行了调查。2月至4月的气温已经重建为公元1719年至1961年。通过这种重建，确定了小冰期晚期的五次变冷事件，并与其他气候代理进行了验证。这与先前日本和中国的文献记录估计的寒期有合理的一致。对于韩国的树木气候重建也发现了一个非常好的一致性，这表明西环太平洋冬季季风的年活动在19世纪比现在持续的时间更长。持续的饥荒和不寻常的气候现象的记录支持了18世纪80年代、19世纪10年代和19世纪30年代寒冷时期的重建。因此，Hinoki年表有足够的潜力来重建更深入过去的气候变化。

We investigated the results of a dendroclimatic study in Central Japan using ring width data from living trees of Hinoki cypress. February--April temperatures have been reconstructed for the period AD 1719--1961. This reconstruction, with which five cooling events were determined for the late Little Ice Age, was validated against other climate proxies. There is a reasonable agreement with cold periods previously estimated from documentary records in Japan and China. A notably good agreement is also found for a dendroclimatic reconstruction for Korea, suggesting that the annual activity of the winter monsoon in the western Pacific Rim persisted longer in the 19^<th> century than at present. Records of constant famines and unusual climatic phenomena support the reconstruction of the cold periods in the 1780s, 1810s and 1830s. It is thus revealed that the Hinoki chronology has enough potential to reconstruct the climatic variability further into the past.