...The other theory of the origin of the ice age is astronomical, and is also difficult to verify, as it is due to (1) fluctuations in solar activity, and (2) the Earth passing through a space with a high concentration of cosmic dust, which increased the shielding effect. The most likely theory at present is the one proposed by Milankovitch M., who, with the opinion of W. Köppen, believes that the cause is the decrease in solar radiation in the summer six months. According to this hypothesis, the change in solar radiation is caused by a combination of the following three factors: *Some of the terminology that mentions "Milankovitch, M." is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…他方の氷期成因説は天文学的なもので,(1)太陽活動の変動による,(2)高濃度の宇宙塵空間を地球が通過したため遮へい効果が増加した,というやはり検証しにくい仮説である。 現在のところ可能性の高い説は,夏半年の日射量の減少が原因になる,というW.ケッペンの意見をいれてミランコビッチM.Milankovitchが提出した仮説である。それによれば,次の三つの要因の組合せで日射量の変化が生じる。… ※「Milankovitch,M.」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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