… The period between 9,000 and 4,000 years ago was a warm period. Of these, the period between 6,500 and 5,500 years ago was called the hypsithermal period, or climatic optimum, and was particularly warm. Temperatures were high worldwide, with an annual average temperature of 2 to 5 degrees Celsius, higher than today. … *Some of the terminology that refers to "climatic optimum" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 9000~4000年前は温暖な時期であった。このなかでも6500~5500年前をヒプシサーマルhypsithermalまたは気候最適期climatic optimumと呼び,特に温暖であった。全世界的に高温で,年平均気温は2~5℃で現在より高温であった。… ※「気候最適期」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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