...This is because (1) the composition of the atmosphere is almost the same up to about 80 km, but changes above that, (2) the amount of atmosphere above 80 km is extremely small, less than one millionth of the total atmosphere, and has almost no effect on the weather near the ground, and (3) the altitude of noctilucent clouds, the highest clouds observed on the ground, is about 80 km. The English word meteorology is very old, coming from Meteorology, written by Aristotle of Greece in the 4th century BC. On the other hand, the Japanese word meteorology is a relatively new word that has been used since the Meiji period. ... *Some of the terminology explanations that mention "Meteōrologica" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…これは,(1)80kmくらいまでであると大気の成分の構成がほとんど同じであるが,それより高くなると変わってくる,(2)80km以上にある大気の量は,全大気の100万分の1以下できわめて少なく,地上付近の気象にはほとんど影響がない,(3)地上で観測されるいちばん高い雲である夜光雲の高度が80kmくらいである,などによるものである。英語のmeteorologyはギリシアのアリストテレスが前4世紀に書いた《気象学Meteōrologica》に由来しており,非常に古い。一方,日本語の気象学は,明治以後使われるようになった,比較的新しい言葉である。… ※「《Meteōrologica》」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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