Climatic Change in Monsoon Asia and around North Atlantic Ocean through historical times

本文讨论了亚洲季风区和北大西洋沿岸历史时期的气候变化。继续建立“历史气候数据库”，并使用其他过去气候数据库的气候数据。利用它们，比较了“中世纪暖期”和“小冰期”的气候差异。本研究的主要结论如下：1.“历史气候数据库“的日常天气和气候灾害记录选自国立国会图书馆和许多县图书馆的旧日记。这些数据被收集到这个数据库中，不仅增加了近代的天气数据，而且增加了中年和老年的天气数据。日本其他历史气候数据库与国外的数据交换本历史气候数据库可在互联网上使用。他们的地址（URL）如下：http：//edcgeo. edu.toyama-u.ac.jp.3。历史时期气候变化的最新研究结果：（1）大西洋周边地区“中世纪暖期”气候温暖，而日本的气候变化不明显;（2）日本“小冰期”气候变化与厄尔尼诺的变化有一定的相关性，而大西洋周边地区气候变化与厄尔尼诺的关系不明显。

Climate Change during historical times in Monsoon Asia and around North Atlantic Ocean is treated in this study. "Historical Climate Data Base" is continued to create and climate data are used from other past climate data base. Using them, climatic difference between "Medieval Warm Period" and "Little Ice Age" are compared. Some remarks of this study are as follows.1. "Historical Climate Data Base"Records of daily weather and climatic hazard are chosen from old diaries in the National Diet Library and many prefectural libraries. Those data are collected into this data base and weather data are incr eased not only in the recent age but also in middle age and old age.2. Data exchange between other past climate data base in Japan and foreign countriesThis Historical Climate Data Base can be used on internet. Their address (URL) is as follow : http : //edcgeo, edu.toyama-u.ac.jp.3. Recent results on the climate change during historical timesThose are clarified on the climate change during historical times through this study.1) It was warm in the "Medieval Warm Period" around Atlantic Ocean but it was not so clear in Japan.2) Climate change in "Little Ice Age" of Japan correlates to the change of El Nino, but the relationship between climate and El Nino is not clear around Atlantic Ocean.