衛星による推論によるトロポスフィアの気温の動向に対する平流層の冷却の貢献

Qiang Fu¹, Celeste M Johanson, Stephen G Warren

¹Department of Atmospheric Sciences, University of Washington, Seattle, Washington 98195, USA. qfu@atmos.washington.edu

Nature

|May 7, 2004

まとめ

衛星による気温データは,平流圏の冷却による弱い温暖化傾向を示した. 再構築されたトロポスフィアの気温は,地表温暖化と一致し,熱帯温暖化が顕著であることを明らかにしています.

科学分野:

大気科学大気科学
気候科学気候科学
リモートセンシング (リモートセンサー)

背景:

地球全体の気温記録は,衛星観測と地表観測の相違を示している.
マイクロウェーブ・サウンディング・ユニット (MSU) のチャンネル2のデータは,表面温度の動向と対照的に,最小限の熱帯圏温暖化を示した.

研究の目的:

衛星観測と地表観測による世界の気温動向の違いを調和させる.
ストラトスフィアの冷却効果のための衛星温度データを訂正するために.

主な方法:

活用型マイクロ波音響ユニット (MSU) のチャンネル2は熱帯圏中部の温度,チャンネル4は平流圏の温度.
MSUチャネル2の読み取りにストラトスフィアの冷却の貢献を定量化しました.
ストラトスフィアの影響を調整することで,熱帯圏の気温のトレンドを再構築した.

主要な成果:

MSUチャンネル2のトレンドは,平流層の冷却によって弱まり,熱帯圏の温暖化を覆い隠した.
衛星データから再構築されたトロポスフィアの気温の傾向は,地表の気温の傾向と密接に一致しています.
熱帯熱帯圏温暖化は,地表温暖化の約1.6倍であることが判明しました.

結論:

衛星による気温データは,平流圏の冷却に修正されると,熱帯圏の温暖化の信頼できる測定値を提供します.
この研究は,衛星と地表温度記録の間の不一致を解決する.
観測された温暖化パターンは,気候モデルの予測と大気物理学と一致しています.

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