地球の歴史における急激な気候変動と絶滅の出来事

T J Crowley, G R North

Science (New York, N.Y.)

|May 20, 1988

まとめ

地上から誘発された突然の気候変動は,環境の急速な変化を引き起こし,絶滅のイベントに寄与することができます. 証拠によると,気候と生物学的移行は,特に気候状態の進化の初期段階では,しばしば一致する.

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
気候モデリング
地質学の歴史地質学の歴史

背景:

気候モデルは,ゆっくりと変化する境界条件に反応して,突然の状態移行を示すことができます.
地上から引き起こされた突然の気候変動は,過去の生物学的危機の原動力であると仮定されています.
気候変動の移行中の補助的な出来事は,段階的な絶滅パターンを説明する可能性がある.

研究の目的:

地球の歴史における地上で引き起こされた急激な気候変動の役割を調査する.
気候と生命の移行の同期性を評価するために,パレオ気候データをファネロゾイク絶滅記録と比較する.
氷のない状態と氷河状態の間の移行中に気候強制に対する生態系の感受性を調査する.

主な方法:

古代気候データの分析.
ファネロゾイク絶滅記録との比較.
断続的な気候反応をシミュレートするための気候モデリング.

主要な成果:

古代気候と絶滅の記録は,気候と生物学的移行の間の頻繁な偶然を示しています.
気候の不安定性は,急速な環境変化と生物の循環のための妥当なメカニズムである.
生態系は,氷のない状態から氷化状態への移行の間に,気候強制により敏感になる可能性があります.

結論:

地上から誘発された気候の不安定さは,急速な環境変化と生物の循環のための実行可能なメカニズムです.
気候変動は重要な要因であるが,他の変動源は排除できない.
気候と生物学的移行の相関係を正確に決定するために,さらなる層図データが必要である.

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