まとめ
世界的な背景 エアロゾール
科学分野:
- 大気科学 大気科学
- エアロゾール科学は,
- 放射能の移転について
背景:
- 光散射および光吸収係数を含むエアロゾールの光学特性は,単発散射アルベドを決定する.
- 大気中の放射能伝送に対するエアロゾールの影響を正確に評価するには,これらの光学係数の連続した同時測定が必要です.
- 遠く離れた海洋の中間熱帯圏は,地球規模のエアロゾール効果を研究するための重要な地域です.
研究 の 目的:
- 遠隔海中熱帯圏における光散射および光吸収係数を継続的に測定する.
- 背景エアロゾールの単発散乱アルベドを判別する.
- 測定された光学特性の放射線伝送モデルへの影響を調査する.
主な方法:
- 光散射および光吸収係数の毎日の同時測定.
- マウナ・ロア天文台からのデータを光吸収測定に使用した.
- 測定された光学係数から単発散射アルベドを計算する.
主要な成果:
- マウナ・ロア天文台で測定された光の吸収係数は,予想以上に高かった.
- 単一分散アルベドは,放射線伝送モデルで一般的に使用される値よりも低いことが判明しました.
- 煙草は,おそらく主光吸収物質であると考えられた.
結論:
- 燃焼に起因する煙灰は,背景エアロゾールの吸収に大きく寄与する可能性がある.
- 燃焼材料の半球的な分散は,エアロゾールの光学特性に影響します.
- 現在の放射線伝送モデルは,観測されたエアロゾールの単一分散アルベドに基づいて調整する必要があるかもしれません.
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