古代気候:海潮とハインリッヒ現象
Brian K Arbic1, Douglas R Macayeal, Jerry X Mitrovica
1Program in Atmospheric and Oceanic Sciences, Princeton University, PO Box CN710, Sayre Hall, Princeton, New Jersey 08544-0710, USA. arbic@splash.princeton.edu
Nature
|November 27, 2004
まとめ
最後の氷河期の間,ラブラドール海の例外的に大きな海潮は,ハインリッヒ事件として知られる巨大な氷山の放出と一致しました. これらの強力な潮は,北大西洋に巨大な氷山を放出する上で重要な役割を果たしたと思われる.
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
- 海洋学 海洋学とは
- 四次地質学 四次地質学
背景:
- 最後の氷河期は,北大西洋に氷河が流した破片を定期的に大量に放出することで,気候の変動が顕著であった.
- ハインリッヒ現象として知られるこれらの急激な気候変動は,主にラブラドール海から発生し,世界的な影響を及ぼしました.
研究 の 目的:
- ハインリッヒ事件の時代にラブラドール海における潮の役割を調査する.
- 潮動力学と氷山軍団の解放との潜在的な関連性を探求する.
主な方法:
- 氷河流出の破片の堆積を示した地質学的記録の分析.
- ラブラドール海における過去の潮帯の再構築.
主要な成果:
- ハインリッヒ事件の時期,ラブラドール海内で例外的に大きな海の潮が特定されました.
- 高潮期間の活動と,氷河船の破片の堆積との間に強い相関が観察されました.
結論:
- ラブラドール海の海の潮は,最後の氷河期のハインリッヒ現象の間,著しく増幅された.
- これらの増幅された潮は,おそらく触媒として作用し,氷河から巨大な氷山の軍団の解放を誘発した.
関連する概念動画
Global Climate Change
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Conditions on Early Earth
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
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