155年の太平洋熱帯のサンゴの記録から気候の変動に対する平均気候変化の影響
F E Urban1, J E Cole, J T Overpeck
1Department of Geological Sciences/INSTAAR, University of Colorado, Boulder 80309, USA.
Nature
|November 9, 2000
まとめ
エルニーニョ/南方振動 (ENSO) システム
科学分野:
- 気候科学 気候科学
- 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,古代気候学 (paleoclimatology) とは
- 海洋学 海洋学 海洋学
背景:
- エルニーニョ/南方振動 (ENSO) は,世界の気候の変動を牽引しています.
- ENSOの長期的な行動とその要因は,未だに十分に理解されていない.
- 1976年,熱帯太平洋の気候に重大な変化が起きました.
研究 の 目的:
- 珊瑚のデータを用いて155年のENSOの行動を再構築する.
- 熱帯太平洋の気候の長期的な変化とENSOの変動性を調査する.
- 地域平均気候とENSOの変動性との関係を調査する.
主な方法:
- 中央熱帯太平洋のサンゴから155年のENSO再構築を開発しました.
- 地域平均気候の変化とENSOの変動を時間とともに分析した.
- ENSOの変動パターンの変化と相関する気候変動.
主要な成果:
- 20世紀初頭,より暖かく,より湿った状態への段階的な移行を特定した.
- 1976年に急激に,より暖かく,より湿った環境への移行を記録した.
- 背景の気候条件と相関する明確なENSO変動パターンを観測した (例えば,19世紀には10年,20世紀初頭には約2.9年,1976年以降は約4年).
結論:
- 熱帯太平洋の気候の変動は,その地域の平均気候状態と密接に関連しています.
- 観測された自然および人為的な気候変動は,ENSOの行動に影響を与えています.
- サンゴの再建は,ENSOの長期的な動態と気候の相互作用に関する重要な洞察を提供します.
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