氷期と氷期後の温度差は,化石の骨におけるアスパルチン酸のラセミ化から推論された
まとめ
古代気候学の研究は,最後の氷河期以降の大陸の温暖化を明らかにしています. 化石骨におけるアスパルティック酸のラセミゼーションは,重要な地域における4~6°Cの温度上昇を示している.
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,古代気候学 (paleoclimatology) とは
- ジオクロノロジー (Geochronology) について
- バイオジオケミストリー バイオジオケミストリー
背景:
- 過去の気候変動を理解することは,将来の気候シナリオを予測する上で極めて重要です.
- 最後の氷河期の終結は,地球温暖化の重要な出来事でした.
研究 の 目的:
- 最後の氷河期以降の大陸地域における気温上昇を定量化するために.
- アスパルティック酸のラセミゼーションの信頼性を古熱計として確立する.
主な方法:
- 既知の年齢の化石骨におけるアスパルティック酸のラセミゼーションの分析.
- 骨のサンプルのための既定のジオクロノロジカル・デッティング・テクニックを活用する.
主要な成果:
- 地中海沿岸の気温上昇は4°Cと推定されている.
- 東アフリカでは5~6°Cの気温上昇が予想されている.
- 結果は,±1°C以内の高い信頼性を示しています.
結論:
- 大陸の気温は,最後の氷河期が終わった後,著しく上昇した.
- アスパルティック酸のラセミゼーションは,過去の大陸の温度を再構築するための信頼できる方法を提供します.
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