Climate variation from medieval to recent times in Japan Europe

通过本研究处理了名为Euro-CLIM的国际数据库。它收集了欧洲和日本的气候危害和异常天气。此外，利用一些气候基础，重建了从中世纪到近代的气候变化。主要研究结果如下：1)从天气描述方法的历史变化和地域差异出发，阐明了天气项、时间和准确度的特点。2)对18世纪冬季逐日天气的天气气候学分析表明，18世纪冬季的日天气出现频繁。3)通过对长期气候灾害资料的分析，明确了日本也存在“中世纪暖期”。4)从厄尔尼诺现象与日本气候的关系来看，厄尔尼诺盛行的时期对应于凉爽潮湿的条件。5)在日本，在“小冰河时代”最冷的时期，日本和欧洲的冬季气候相似，但在夏季。在“1816年无夏之年”中，东亚地区并不凉爽。

International data base called Euro-clim was processed through this study. That collects climate hazards and unusual weathers from Europe and Japan. Further, using some climate bases, climate variation from medieval to recent times is reconstructed. The main results are as follows.l) Characteristics of weather term, time and accuracy are clarified from historical change and areal difference of the descriptive method of weather.2) On the synoptic climatological analysis of the daily weather of the winter in the 18th century, it is clear that winter weather pattern appeared frequently in those times.3) It is clarified that there was "Medieval Warm Period" also in Japan, by the analysis of long term climate hazards data.4) From the relation between the El Nin^^-o and climate of Japan, the period in which El Nino prevails corresponds to cool and wet condition.5) In Maunder Minimum Period, the coldest period in the "Little Ice Age, " winter climate was similar between Japan and Europe but in summer.6) In "Year without summer : 1816, " it was not cool in Eastern Asia.