木星での地球規模の気候変動の予測

Philip S Marcus¹

¹Department of Mechanical Engineering, University of California, Berkeley, California 94720, USA. pmarcus@me.berkeley.edu

Nature

|April 23, 2004

まとめ

木星の渦は,繰り返される気候サイクルで消え,再現します. このサイクルが地球全体の温度変化と大気不安定化を引き起こし,数十年にわたって新しい渦の形成につながります.

科学分野:

惑星科学惑星科学
大気ダイナミクス大気ダイナミクス
流体力学流体力学とは

背景:

木星の大気には,長寿のグレート・レッド・スポットとホワイト・オーバルを含む多数の渦が特徴です.
1997年から2000年の間に2つのホワイト・オワルの予期せぬ消失は,その大気動態の調査を促した.

研究の目的:

木星の渦の周期的な気候サイクルモデルを提案する.
木星の白い円の消失の背後にある原因を調査し,将来の渦の行動を予測するために.

主な方法:

木星の大気動力の数値シミュレーション.
ローズビー波と乱流との渦の相互作用の分析.

主要な成果:

渦の消失は,ロスビー波の谷に閉じ込められ,合併を引き起こすことと関連しています.
繰り返されるサイクルは,10年以内にほとんどの木星の渦が消滅すると予測しています.
渦の損失は10 Kの地球温度の変化を誘導し,大気を不安定化し,新しい渦を形成します.

結論:

木星のホワイト・オワルの消滅は,周期的な過程の一部である.
このサイクルには,渦の融合,大気不安定化,再形成が約60年に及ぶ.
将来の研究は,この周期的モデルを継続的な観測で検証することに焦点を当てなければなりません.

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