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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク North African climate cycles ： ウィキペディア英語版 North African climate cycles North African Climate Cycles have a unique history that can be traced back millions of years. The cyclic climate pattern of the Sahara is characterized by significant shifts in the strength of the North African Monsoon. When the North African Monsoon is at its strongest annual precipitation and subsequent vegetation in the Sahara region increase, resulting in conditions commonly referred to as the "green Sahara". For a relatively weak North African Monsoon the opposite is true, with decreased annual precipitation and less vegetation resulting in a phase of the Sahara climate cycle known as the "desert Sahara".〔 Variations in the climate of the Sahara region can at the simplest level be attributed to the changes in insolation due to slow shifts in Earth’s orbital parameters. These parameters include the precession of the equinoxes, obliquity, and eccentricity as put forth by Milankovitch theory.〔 The precession of the equinoxes is regarded as the most important orbital parameter in the formation of the "green Sahara" and "desert Sahara" cycle. ==Orbital Monsoon Hypothesis== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「North African climate cycles」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.