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大西洋と太平洋におけるプレイストセンの気候:深海の堆積物に基づく再評価比較
Science (New York, N.Y.)
|July 24, 1970
まとめ
インド洋のプランクトン動物は,Globorotalia menardii.とは逆の気候変化を示しています. 単一種の相関は信頼できないため,大西洋と太平洋の平行プレイストセンの歴史を示唆しています.
科学分野:
- パレオセアノグラフィーと海洋マイクロパレオンタロジー
- 四次期の気候再構築
背景:
- プランクトン型フォラミニフェラは,過去の海洋条件と気候を再構築するための代理として広く使用されています.
- 以前の研究では,大西洋と太平洋の間の四分期コアが相関していることが示された.
研究 の 目的:
- Globorotalia menardii複合体を用いてインド洋の気候変動を調査する.
- 海洋間水の質量相関について単一のプランクトン種を使用する信頼性を評価する.
- 大西洋と太平洋のプレイストセンの海洋学史を比較するために.
主な方法:
- インド洋の堆積物核におけるGloborotalia menardii複合変異の分析.
- カリフォルニアとバハ・カリフォルニアの海岸からのコアにおけるNeogloboquadrina dutertrei subcretaceaの検査.
- 大西洋と太平洋の過去の四年期のコア相関とデータの統合.
主要な成果:
- インド洋におけるGloborotalia menardiiの複合的な変異は,プランクトン生物の総数とは反対の気候傾向を示唆する.
- Neogloboquadrina dutertrei subcretaceaのデータは,異なる水質を結びつけるための単一種の相関の価値に疑問を投げかけています.
- 証拠は,大西洋と太平洋の間の平行的なプレイストセンの歴史を示しています.
結論:
- 単一のプランクトンフォラミニフェラ種に基づく気候の解釈は,誤解を招くことがあります.
- 大西洋と太平洋におけるプレイストセンの時代は,おそらく同期的な環境変化を経験した.
- マルチプロキシアプローチは,堅固な古海洋学再構築に不可欠です.
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