Permalink : http://hdl.handle.net/2115/55015

多様なエアロゾル種を対象に, 雲の発生環境場において雲核あるいは氷晶核として有効に働くエアロゾル種の同定を進めている. 大気中エアロゾル粒子の物理化学生物特性と雲核・氷晶核能との関連性および雲生成過程への関与を的確かつ定量的に表現することは, メソ数値予報モデルや数値気候モデルの精度向上にとって重要な課題である. エアロゾル－雲－降水相互作用に関する知見の取得や気候影響評価におけるエアロゾル間接効果の不確定性の低減を目指して, MRI雲生成チェンバー等の実験的手法に基づくエアロゾル・雲・降水を統一的に取扱う新たなパラメタリゼーションの構築に取組んでいる. 本稿では, 雲生成チェンバー実験の概要と特定エアロゾル粒子を用いた実験結果について述べる.
A variety of aerosol species has an inherent ability to act as CCN and/or IN, and some of them actually activate under conditions relevant to the atmosphere. An accurate and quantitative description of the relation between physicochemical and biological properties of aerosol particles and their activity and potential role in cloud formation is a crucial subject for improvement of numerical cloud simulation and weather/climate prediction models. To overcome the current lack of understanding of aerosol-cloud-precipitation interactions and to reduce the uncertainty in estimates of the aerosol indirect effects, we are attempting to propose novel incorporate parameterizations that link aerosol particles and cloud particles from the experimental approaches. This article focuses on the MRI dynamic cloud chamber experiments in progress and shows results of various types of specific particles.