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プレイストセンの100kyrの氷河周期におけるプレセシオン,傾斜,および特異性の明確な役割
Stephen Barker1, Lorraine E Lisiecki2, Gregor Knorr3
1School of Earth and Environmental Sciences, Cardiff University, Cardiff, UK.
まとめ
地球
科学分野:
- 古代気候学
- 気候の動態
- 地球システム科学
背景:
- 氷河期と氷河期間の移行は 地球の気候の動態を理解するために不可欠です
- 正確な年齢制御は,軌道強制に気候のシフトを代入する上で課題です.
- これらのサイクルにおける 前進,傾斜,離心性の相互作用は複雑である.
研究 の 目的:
- 氷河期と氷河期間の移行における軌道パラメータの影響を調査する.
- 氷河解凍と氷河形成におけるプレセッションと傾斜の役割を明らかにする.
- 10万年の氷河周期の形態論を 決定的モデルとして確立する
主な方法:
- 脱氷と氷河形成の形状の分析
- 前進と傾斜の相対的な段階にフォーカスする.
- 終端イベントを特定するための特異性最小値との相関.
主要な成果:
- 脱氷と発芽形態は,プレセッション-傾斜相関係に強く依存しています.
- プレセーションは主に脱氷の始まりに影響します.
- 傾きは,ピークの氷河間条件と氷河の始まりにおいてより重要です.
結論:
- 100万年前からの終結のタイミングは,特定のプレセシオンと傾斜相の組み合わせに関連しています.
- 終結は,特異性最小値の後,特定のプレセシオン-傾斜パターンに従って発生します.
- 100kyrの氷河周期の形状は,主に決定的な行動を示しています.
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