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プレイストセンの末期まで,熱帯西太平洋における氷河間水候
A N Meckler1, M O Clarkson, K M Cobb
1Geological and Planetary Science Department, California Institute of Technology, Pasadena, CA, USA. nele.meckler@erdw.ethz.ch
まとめ
熱帯水気気候は氷河期間の間でも安定したままであり,強制力に基づく気候変動を安定させたり増幅させたりすることを示唆しています. これは過去の気候動態の理解に影響を与える.
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
- 気候科学 気候科学
- 四次地質学 四次地質学
背景:
- 大気中の二酸化炭素 (P(CO(2))) と南極の気温は,約43万年前に変化を示しています.
- これらの変化による地球温暖化の影響は十分に理解されていません.
研究 の 目的:
- 570〜210 ka. の熱帯西太平洋水候を再構築する.
- 氷期間の気候変動に対する熱帯水候の感受性を調査する.
主な方法:
- スタラグミットベースの古気候再構築.
- 熱帯西太平洋の水気気候変化の分析.
主要な成果:
- 熱帯の降水量は,4つの氷河期間の間で一貫していました.
- 熱帯水候は,氷河間P ((CO ((2)) と高緯度の気温変動に対して無感を示した.
- 熱帯西太平洋の乾燥は,氷河期の終結時に北の高緯度の冷却と一致しました.
結論:
- トロピカルコンベクティブ・ヒートエンジンは,気候安定化器や増幅器として機能します.
- 水気気候反応は,気候強制の性質に依存する.
- 氷河期と氷河期間のサイクルにおける熱帯気候の動態についての洞察を提供します.
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