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地球のような惑星の脱走した温室効果プロセスに対する日焼けの値の増加
Jérémy Leconte1, Francois Forget1, Benjamin Charnay1
1Laboratoire de Météorologie Dynamique, Institut Pierre Simon Laplace, 4 Place Jussieu, BP 99, 75252 Paris, France.
Nature
|December 17, 2013
まとめ
地球 地球 地球 地球 地球 地球
科学分野:
- 惑星科学は惑星科学である.
- 気候モデリング
- 大気物理学 大気物理学
背景:
- 太陽の明るさが増加すると,温室効果が激化する可能性があります.
- 一次元のモデルには,臨界日当たりの値を予測する際の限界があります.
- 雲とダイナミックなフィードバックは,地球の気候の安定性にとって極めて重要です.
研究 の 目的:
- 3Dの世界的な気候モデルを使用して,脱走した温室効果状態のための日焼けの値を決定する.
- 惑星の居住可能性における雲と大気動態の役割を調査する.
- 初期の金星で液体の水が存在する可能性を再評価する.
主な方法:
- 3次元の世界的な気候モデルを利用した.
- 地球のような惑星が日照が増加した時の気候反応をシミュレートした.
- ストラトスフィアの水蒸気と放射線効果を分析した.
主要な成果:
- 脱走した温室効果の値は約375Wm−2で,以前に推定されたより高い.
- クラウドフィードバックが不安定化していることが判明しました.
- ハドリー循環の安定効果は,脱走限界を,より高い日焼け値にシフトさせます.
結論:
- 3Dモデルは,脱走した温室効果の限界のより正確な評価を提供します.
- 惑星の居住可能性は,これまで考えられていたよりも高い太陽照射レベルにまで広がる可能性があります.
- この発見は,金星の過去の気候と系外惑星の居住可能性についての理解に影響を与えます.
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