強い海の潮流と,外惑星の衛星の加熱

Robert H Tyler¹

¹Applied Physics Laboratory and Department of Earth and Space Sciences, University of Washington, 1013 NE 40th Street, Seattle, Washington 98105, USA. tyler@apl.washington.edu

Nature

|December 17, 2008

まとめ

ユーロパのような氷の月の液体海は,共鳴するロスビー波によって加熱される可能性があります. 軸の傾きによるこれまで考えられなかった潮力は,これらの波を駆動し,重要な内部熱源を提供する可能性があります.

科学分野:

惑星科学は惑星科学である.
海洋学海洋学とは
地質物理学地質物理学とは地質物理学です.

背景:

証拠によると,外側の惑星の衛星,特にヨーロッパに液体の海洋が存在していることが示唆されています.
これらの地下海を極端な寒さや低放射性熱から守るメカニズムは完全に理解されていません.
現在の理論では,月の潮屈曲と氷の隔離層を主熱保持方法として提案しています.

研究の目的:

氷の月の地下海を温めるための代替メカニズムを調査する.
単なる軌道離心率を超えた潮力の役割を探求する.
これらの海洋内の潜在的共鳴現象を特定するために.

主な方法:

液体の海洋における潮の消去の分析.
傾き (軸の傾き) から生じる潮力のモデリング.
大幅のロスビー波の共振刺激の研究.

主要な成果:

強い潮の消散と加熱は,液体の海洋の中で起こります.
傾きによる潮力は,大きな振幅のロスビー波を共鳴的に刺激することができます.
ヨーロッパでは,この共鳴は,支配的な潮力よりもはるかに大きな運動エネルギーを生み出します.

結論:

傾きによって引き起こされる潮力は,地表の海域の主要な熱源であると考えられます.
響のロスビー波は,氷の月の液体の水を維持するための実行可能な説明を提供します.
このメカニズムは,海洋世界の居住可能性の評価において極めて重要な役割を果たす可能性がある.

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