遠隔の海面温度変化が熱帯サイクロンの潜在的強度に与える影響
Gabriel A Vecchi1, Brian J Soden
1Geophysical Fluid Dynamics Laboratory, NOAA, Princeton, New Jersey 08542, USA. Gabriel.A.Vecchi@noaa.gov
Nature
|December 14, 2007
まとめ
地球温暖化は,地球温暖化です.
科学分野:
- 気候科学 気候科学
- トロピカル気象学 トロピカル気象学
- 海洋学 海洋学とは
背景:
- 熱帯サイクロン活動が地球温暖化への反応として議論されている.
- 暖かい海面温度はサイクロンの発生を助長すると考えられていますが,大気熱力学も重要な役割を果たしています.
- トロピカルサイクロンの潜在強度は,上限強度と発生可能性の尺度である.
研究 の 目的:
- 海面温度変化と熱帯サイクロンの潜在的強度との関係を調査する.
- 地域温暖化パターンが潜在的な強度にどのように影響するかを調査する.
- 観測データを用いて,潜在的強度の過去の変化を再構築する.
主な方法:
- 気候モデルと観測再構築を用いた.
- 海面温度の変化と熱帯サイクロンの可能性の強さを分析した.
- 温暖化の地域構造と潜在的強度との相関を調査した.
主要な成果:
- 地元の海面温度の変化は,潜在的強度変化を特徴付けるには不十分である.
- 長期的な潜在的強度の変化は,地域温暖化パターンと相関しています.
- 大西洋の潜在強度は,海面温度が高いにもかかわらず,最近ではなく,20世紀半ばにピークに達しました.
結論:
- 地元の海面温度だけでなく,地域温暖化の構造が,潜在的強度の変化を決定する.
- 温室効果ガスによる温暖化は,自然気象変動とは異なる影響を熱帯サイクロンに及ぼす可能性があります.
- 熱帯サイクロン活動の温暖化への反応は複雑で,地域によって異なります.
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