バイオマス燃焼,堆積雲,平流層の水分との間の微物理的な関連性
1Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA. steven.sherwood@yale.edu
Science (New York, N.Y.)
|February 16, 2002
まとめ
熱帯生物質を燃やすエアロゾールは,氷の結晶のサイズに影響することによって,平流層の湿度に影響を与えます. エアロゾールの増加により,氷の結晶が小さくなり,水蒸気が一層上層圏に流入し,長期にわたる増加が説明される可能性がある.
科学分野:
- 大気科学 大気科学
- 気候科学 気候科学
- 地球システム科学 地球システム科学
背景:
- ストラトスフィアの水蒸気は強力な温室効果ガスであり,気候に影響を与えます.
- ストラトスフィアの水蒸気を制御する要因を理解することは,気候モデリングに不可欠です.
- 熱帯生物質の燃焼は,大気中のエアロゾールの重要な源である.
研究 の 目的:
- ストラトスフィアの湿度,熱帯熱帯圏の相対湿度,雲の氷結晶のサイズ,およびバイオマスを燃やすエアロソルを結びつける因果連鎖を確立する.
- ストラトスフィアの水蒸気含有量に対するエアロゾールの影響を調査する.
主な方法:
- ストラトスフィアの湿度,熱帯圏の相対湿度,氷結晶の大きさ,およびバイオマス燃焼エアロゾルの衛星観測変動の分析.
- 月間から年次までの時間スケールの変動を調べる.
主要な成果:
- 研究された変数を結びつける可能性の高い因果連鎖が特定されました.
- エアロゾールの増加は,高架な堆積雲の小さな氷結晶と関連していました.
- より小さな氷の結晶は,平流圏に入る水蒸気の増加と相関していました.
結論:
- バイオマスを燃やすエアロゾールは,平流圏の水蒸気を調節する上で重要な役割を果たします.
- 特定されたメカニズムは,過去50年にわたって観測された平流層の水蒸気の増加に対する潜在的な説明を提供します.
- この発見は,気候変動研究と大気モデリングに意味を持つ.
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