熱帯太平洋は,過去2世紀にわたってインド洋西部の10年間のSSTの変動を強制しています

Cole¹, Dunbar, McClanahan

¹Department of Geological Sciences/Institute of Arctic and Alpine Research (INSTAAR)/Program in Atmospheric and Ocean Sciences, University of Colorado, Boulder, CO 80309, USA. Department of Geological and Environmental Sciences, Stanfor.

Science (New York, N.Y.)

|January 29, 2000

まとめ

194年間のサンゴ記録は,熱帯太平洋の気候の変動がインド洋西部に大きく影響していることを示しています. この研究は,十年にわたる気候変動と1800年代以降の1.3°Cの温暖化傾向を記録しています.

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
海洋学海洋学とは
気候科学気候科学

背景:

サンゴの骨格記録は,過去の気候条件を再構築するための貴重な代理データを提供します.
十年間の気候変動の変動を理解することは,将来の気候変動の影響を予測する上で極めて重要です.

研究の目的:

珊瑚の酸素同位素を用いて194年にわたる海面温度 (SST) の変動を再構築する.
熱帯太平洋の気候の変動がインド洋西部の気候に及ぼす影響を調査する.

主な方法:

ケニアのマリンディのサンゴの骨格デルタのO比率の分析.
珊瑚から派生したSST記録を,楽器データとプロキシ気候データと比較.

主要な成果:

194年間の記録は,熱帯太平洋の変動 (年間から十年間スケール) と一致するSSTの変化を示しています.
1800年代初頭以来,高さ1.3°Cの顕著な温暖化傾向が観察されました.
熱帯太平洋の気候の変動は,西インド洋に明らかな影響を及ぼします.

結論:

熱帯太平洋は,インド洋西部の10年間の気候変動の主要な原動力である.
強いエルニーニョ-南方振動のテレコネクションを持つ地域も,この太平洋-インド洋のリンクによって影響を受けることがあります.

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