潮から,ハワイの山脊に沿って混じり合うまで
Daniel L Rudnick1, Timothy J Boyd, Russell E Brainard
1Scripps Institution of Oceanography, La Jolla, CA 92093-0213, USA. drudnick@ucsd.edu
まとめ
潮エネルギーは,ハワイ山脈に沿った海洋の乱れを助長し,大きな内部潮波が乱れの消去を大幅に増加させます. この研究は,潮から乱流のカスケードが,主要な海洋混合経路であることを確認しています.
科学分野:
- 海洋学 海洋学 海洋学
- 流体力学 流体力学とは
- 地質物理学 地質物理学とは地質物理学です.
背景:
- 海洋の混合は,気候と海洋生態系の規制に極めて重要です.
- 潮流から乱流へのカスケードは,海洋の混合を駆動するエネルギー転送の仮説的な経路です.
- このエネルギー経路を理解することは,正確な気候と海洋モデルのために不可欠です.
研究 の 目的:
- ハワイ山脈に沿って,潮から渦巻へのエネルギーカスケードが起こるという仮説を調査するために.
- この地域における海洋の混合における内潮とそれに伴う乱流の役割を定量化するために.
主な方法:
- ハワイ山脈に沿って収集された観測データを活用した.
- 内部潮の動態とエネルギーフルースをシミュレートするために数値モデルを使用しました.
- オープンオーシャン値と比較して,分析された乱流の消散率.
主要な成果:
- 内部潮エネルギーフルースの差異が,モデルの予測と一致して,リッジで観察されました.
- 300メートルまでの振幅を持つ大規模な内部潮波が記録されています.
- の近くでは,公海よりも10倍高い乱流の消散率であることが判明した.
結論:
- ハワイ山脈は,潮から渦巻に至るエネルギーのカスケードの重要な場所として機能します.
- 内部潮は,波乱の増大と海洋の混合を生成する上で重要な役割を果たします.
- このカスケードのエネルギー予算は終了に近づいており,仮説の経路を検証しています.
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