Variation of atmospheric circulation in historical times of East Asia

收集文字资料，重建历史时期的气候，并通过该项目构建了1999-2000年的数据库。特别是日本海沿岸和全国的县图书馆、档案馆和大学图书馆收集了“小冰期”和“中世纪暖期”的天气和天气灾害数据。不仅文本数据，而且图片数据都是用数码相机采集的。这些数据被添加到个人计算机的“历史气候数据库”中。日本各地的天气频率和气候灾害分布图就是基于这个数据库绘制的。其次，论述了当今气候灾害分布与大气环流的关系，分析了“小冰期”和“中世纪暖期”的气候变化。并利用日本等国的气候变化成果，阐明了大范围的气候变化和气候的长时间变化，该项目的成果和数据库也开放给一般人使用。特别是把它们放在主页上，匿名的人就可以免费使用它们(http：//edcgeo，edu.toyama-U.S.ac.jp)。此外，还利用数据库中增加的图片数据，对演示文稿进行了更正，使许多人很容易识别。该数据库也通过CD-R发行。而这个项目的报告也是为了同样的目的而出版的。该项目的部分成果已在日本地理学家协会大会上公布。

Written sources are collected to reconstruct climate of historical times and the database is constructed through this project from 1999 to 2000. Especially weather and weather hazards data are collected of "Little Ice Age" and "Medieval Warm Period" at the prefecture libraries, archives and university libraries of the Japan Sea Coast and whole country. Not only text data, but also picture data are collected using digital camera. Those data are added to the "Historical Climate Database" using personal computer.Distribution maps of weather frequency and climate hazards around Japan are drawn based on this database. Next, the relation between climate hazard distribution and atmospheric circulation of nowadays are treated, and the climate variation in "Little Ice Age" and "Medieval Warm Period" are analyzed. And also using the results of climate change of Japan and other countries, climate variation of wide area and climate variation through long times are clarified.The results of this project and also the database are opened for the general use. Especially put them on the homepage and the anonymous people can use them freely (http : //edcgeo, edu.toyama-u.ac.jp). Also using picture data what are increased in database, presentation is corrected to recognize easily for many people. This database is distributed by CD-R, too. And the report of this project is published for the same purpose. Some parts of these results of this project are presented at the congress of the Association of Japanese Geographers.