南極大陸と北大西洋における同期的な気候変動

Steig¹, Brook, White

¹E. J. Steig, J. W. C. White, S. J. Lehman, Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309, USA. E. J. Brook, Department of Geology, Washington State University, Vancouver, WA 98686, USA. C. M. Sucher, Gradua.

Science (New York, N.Y.)

|October 2, 1998

まとめ

南極の氷芯は,北半球との同期的な気候変化を明らかにし,急激な気候変動イベントに対する非同期的な半球反応の以前の概念に挑戦しています.

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
氷河学氷河学とは
海洋学海洋学海洋学

背景:

グリーンランドの氷核は10万年以上にわたる急激な気候変動を示しています.
北大西洋の深海核は,千年来の気候の変動と海洋熱ハリン循環の関連性を確認しています.

研究の目的:

南極の気候記録を調査し,北大西洋の大規模な気候現象の証拠を探します.
南極の気候反応と北半球の気候反応を比較する.

主な方法:

テイラー・ドームの氷芯の分析,ロス海西,南極.
南極の気候データとグリーンランドと北大西洋の既存の記録を比較する.

主要な成果:

テイラー・ドームの氷芯は,北大西洋の2つの主要なイベントを記録しています:氷河期末の温暖化とボリング/アレロッド・ヤングル・ドライアスの振動です.
この同期的な記録は,他の南極の氷核で観察された非同期的な反応と対照的です.

結論:

北大西洋地域の急激な気候変動は,西南極に反映されています.
これは,南極のいくつかの記録によって以前に示されたよりも,半球間のより結合された気候システムを示唆しています.

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