サブ熱帯の東南大西洋で 雲が急に晴れる
Sandra E Yuter1, John D Hader2,3, Matthew A Miller2
1Department of Marine, Earth, and Atmospheric Sciences, North Carolina State University, Raleigh, NC, USA. seyuter@ncsu.edu.
まとめ
サブ熱帯の大西洋上空の 低い雲の甲板は 急速に晴れています 大気中の重力波によって引き起こされる この突然の雲の侵食は 地球の放射線バランスと 気候の感受性に 影響を及ぼします
科学分野:
- 大気科学
- 気候科学
- 雲の物理
背景:
- 亜熱帯海域の低層雲層は 広大な海域を覆っています
- これらの雲は 地球の放射線バランスを 調節する上で重要な役割を果たします
- 雲のダイナミクスを理解することは 気候の正確なモデリングに不可欠です
研究 の 目的:
- サブ熱帯海域の低雲層の急激なクリアリングを記録し特徴づけること.
- これらの雲の侵食現象の規模,速度,原因を調査します.
- これらの現象が地球規模の放射線バランスと気候感受性に及ぼす影響を評価する.
主な方法:
- 低雲層の衛星観測の分析
- 雲の境界線と移動を追跡する.
- 雲の侵食現象と大気現象の相関関係
主要な成果:
- 大西洋南東部の大きな層の急激なクリアリングを観察した.
- 雲の侵食の境界線は数百から数千キロメートルに広がり 8〜12m/sで西に移動しています
- 年間ピークは4月から6月で 雲の減少は15分以内に 10kmのスケールで起こります
- 大気中の重力波が 雲の侵食の原因だと考えられています
結論:
- 急速な亜熱帯海雲解消は 気候に影響を及ぼす 重要な現象です
- 大気中の重力波が これらの急激な雲の侵食の主な原因であるようです
- 地球温暖化への影響を完全に理解するにはさらなる研究が必要です.
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