Climate reconstruction of past 500 years by using Picea glehnii of cool-temperate zone

以北海道北部寒温带的油松云杉为材料，对北海道北部近500年来的气候变化进行了研究，得到的油松云杉的年轮宽度变化与湿地土壤中的蛇纹土具有相似的时间变化。北海道北部过去300年气候变化的估计值，并与其他替代气候记录进行了比较。由于所获得的样本很多是300年的年轮数，气候重建成为过去300年的气候重建，结果并没有达到最初的目的。然而，树木年代学技术到目前为止一直被认为是很难做到的，预计过去的气候将从记录到北海道生长到北海道的沙地云杉的年轮宽度作为气候重建的贡献。下一阶段的计划时间表旨在推进针对过去500-1000年气候重建的研究，以适应世界气候变化。

The purpose of the research was done for the reconstruction of the climatic change of past 500 years in northern Hokkaido by using Picea glehnii of cool-temperate zone.In the change of annual tree-ring width of the obtained Picea glehnii, the similar time change was admitted the serpentine soil in the wetland soil. The estimated value of the climatic change of the past 300 years in northern Hokkaido which had been compared with other proxy climatic records. Because many of obtained samples were annual tree-ring numbers of 300, the climate reconstruction became past 300 years, An initial purpose was not achieved in the result.However, dendrochronological technology of that have so far been considered difficult to do, a past climate is expected to annual tree-ring width of the Picea glehnii which grows to Hokkaido from the record of the same time change as can the contribution to the climate reconstruction.The plan of the next stage schedule to advance the research aiming at the climate reconstruction of the past 500-1000 years tuned to the world climatic change.