バイオマス燃焼による煙による直接的な放射能強制作用.
1P. V. Hobbs, J. S. Reid, R. A. Kotchenruther, R. J. Ferek, Department of Atmospheric Sciences, University of Washington, Seattle, WA 98195-1640, USA. R. Weiss, Radiance Research, Seattle, WA 98177, USA.
Science (New York, N.Y.)
|March 21, 1997
まとめ
バイオマスの燃焼による煙は,地球全体の冷却を引き起こし, -0.3W/m2.2の直接的な放射力作用が推定されています. この影響は温室効果ガスの温暖化より小さいが,地域的に顕著で,気候に潜在的に影響を与える.
科学分野:
- 大気科学 大気科学
- 気候科学 気候科学
- 環境科学 環境科学
背景:
- バイオマスの燃焼により,大気中に煙粒子が放出されます.
- 煙の粒子は地球の放射線バランスと気候に影響を与えます.
- 煙の放射性フォッシングを理解することは,気候モデリングに不可欠です.
研究 の 目的:
- バイオマスを燃やす煙が地球の放射線バランスに及ぼす影響を評価する.
- グローバルな煙の排出の直接的な放射線強制を定量化するために.
- 煙の気候への影響を温室効果ガスの影響と比較するために.
主な方法:
- ブラジルの煙光学パラメータの空中測定.
- 測定されたパラメータに基づいて,直接的な放射線強制力の計算.
- 煙の放射性影響を世界規模で推定する.
主要な成果:
- バイオマス煙による世界の平均的な直接的な放射能強制は,−0.3 W/m2 (冷却) と推定されています.
- この冷却効果は,人為的な温室効果ガスによる温暖化 (+2.45 W/m2) よりも著しく小さい.
- 煙から生じる地域的な直接的な放射能強制は,相当なものである可能性があります.
結論:
- バイオマスを燃やす煙は,地球温暖化に冷却効果をもたらします.
- 世界的に見ると控えめですが,地域的な煙の影響は,間接的に世界の気候パターンに影響を与える可能性があります.
- 地域的な影響と間接的な強制メカニズムに関するさらなる研究が必要である.
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