まとめ
放射性炭素年代測定法により,フランスで14万年にわたる気候の変化が明らかになった. 中部ワイチェル寒冷期は7万年前から始まり,葉の落ちる森林の減少によって特徴づけられました.
科学分野:
- 古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは,古代気候学 (paleoclimatology) とは
- 四季地質学 四季地質学
- パリノロジーはパリノロジーの学科です.
背景:
- 大陸の花粉記録は,過去の気候の動態についての洞察を提供します.
- フランス北東部のグランデ・ピレは,連続した花粉の配列を保持しています.
- 長期的な気候変動の変動を理解することは,将来の変化を予測するために極めて重要です.
研究 の 目的:
- グランデ・パイルの花粉記録の正確な年代順を確立するために.
- 過去14万年の気候変化を再現するために.
- 大陸の気候現象と海洋の同位体記録を相関させるため.
主な方法:
- 年代的枠組みを確立するために16の放射性炭素年代が得られた.
- グランデ・パイルの連続的な大陸花粉記録の分析.
- 確立された海洋酸素同位体ステージ記録との比較.
主要な成果:
- グランデ・パイルの記録には7万年前まで遡る詳細な年代順が確立された.
- 中期のウィッシェル寒冷期の始まりは,現在より7万年前 (B.P. ) を実施する.
- この気候現象は,その場所の葉の落ちる森林の消失と一致しています.
結論:
- 初期ワイチェセリアン時代は,現在,紀元前7万年前と位置づけられている.
- 大陸の気候 (Grande Pile) と海洋の記録 (酸素同位体) の間の強い相関は,B.P. 70,000年まで実証されています.
- 7万年を超えた更なる相関 B.P. 提案されています.
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