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07:28
Evolution of Staircase Structures in Diffusive Convection
Published on: September 5, 2018
熱帯サイクロンによって誘発された海洋ヒートポンプの観測証拠
1Department of Earth and Atmospheric Sciences, Purdue University, West Lafayette, Indiana 47907, USA.
Nature
|June 1, 2007
まとめ
熱帯サイクロンは,熱帯海を著しく冷却し,垂直混合を引き起こします. このプロセスは,ピークの海洋熱輸送の約15%を占め,世界の気候モデルに影響を与えています.
科学分野:
- 海洋学 海洋学とは
- 気候科学 気候科学
- マリン・バイオロジー マリン・バイオロジー
背景:
- 海洋の混合は,世界の気候規制と海洋生態系にとって極めて重要であり,熱と栄養の輸送に影響を与えます.
- 海洋混合の直接的な測定は,予算で推論された比率よりも低いため,量化されていない混合プロセスを示唆しています.
- トロピカルサイクロンは局所的な海洋混合を引き起こすことが知られているが,地球規模での影響は未検証のままである.
研究 の 目的:
- 熱帯サイクロンが地球規模で重要な海洋混合剤であるという仮説を検証する.
- 熱帯サイクロン活動によって引き起こされる垂直混合を定量化するために.
- 熱帯サイクロンによって引き起こされる混合が海洋の熱伝送に与える影響を評価する.
主な方法:
- 熱帯サイクロンの通過前と後の海面温度を比較する.
- 観測された温度変化に基づいて垂直混合を計算する.
- この混合が極方向の熱伝送に与える影響を推定する.
主要な成果:
- 熱帯のサイクロンは,熱帯の表面海で,著しい冷却と垂直混合を引き起こします.
- 海洋熱輸送のピークの約15%は,熱帯サイクロンによって引き起こされる混合に起因する.
- 混合の大きさは,海面温度と強く相関しています.
結論:
- トロピカルサイクロンは,世界の海洋混合と熱輸送の重要な原動力です.
- 将来の海面温度の変化は,現在の気候モデルでは捉えられない方法で,海洋循環と熱伝送を変化させる可能性があります.
- 熱帯サイクロンの影響を考慮することは,正確な気候予測に不可欠です.
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