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木星の大気中の水分コンベクションの観測. ガリレオのイメージングチーム
Gierasch1, Ingersoll, Banfield
1Department of Astronomy, Cornell University, Ithaca, New York 14853, USA. pjg10@cornell.edu
Nature
|February 25, 2000
まとめ
木星の活発な天候は,地球の雷雨に似た,湿ったコンベクションによって動いています. 水の凝縮と雷を伴うこのプロセスは,木星の大気中の熱流を,木星の大気中の運動エネルギーに大幅に変換します.
科学分野:
- 惑星科学は惑星科学である.
- 大気科学 大気科学
- 気象学 気象学 気象学
背景:
- 木星のダイナミックな気象を駆動する主要なエネルギー源は,内部熱と太陽放射線を主要な仮説として持っていながら,依然として不確実である.
- 以前,木星での雷の検出は,詳細な雲の構造と動的分析が欠けていました.
研究 の 目的:
- 木星の活発な気象学のエネルギー源を調査するために.
- 雷と関連した木星の嵐システムの雲構造とダイナミクスを分析する.
主な方法:
- 木星の昼側で,雷と水の凝縮によって特徴づけられる活発な嵐のシステムの観測.
- 嵐の観測と,惑星の夜側で同時に雷が観測されたとの相関.
- 観測された嵐システムによる垂直熱伝達の推定.
主要な成果:
- 少なくとも50kmの縦幅と4,000kmの長さの活発な嵐システムが観測されました.
- 嵐のシステムは,雷と水の凝縮の両方を示した.
- このような嵐による推定垂直熱伝搬は,木星の内部熱源に匹敵する.
結論:
- 湿気コンベクションは,地上の雷雨に類似して,木星の大気中の熱流を運動エネルギーに変換する支配的なメカニズムです.
- この発見は,木星の気象システムに電力を供給する際に,内部熱と大気伝導が重要な役割を果たすことを示唆しています.
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