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完全圧縮LESモデルの開発と層積雲の成長過程に関する計算 : 雲・エアロゾル科学への計算科学からの貢献

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Title: 完全圧縮LESモデルの開発と層積雲の成長過程に関する計算 : 雲・エアロゾル科学への計算科学からの貢献
Other Titles: Development of a fully compressible Large Eddy Simulation Model,and simulations of stratocumulus life cycle : Contribution from the computational science to science of aerosol and cloud microphysics
Authors: 佐藤, 陽祐1 Browse this author
西澤, 誠也2 Browse this author →KAKEN DB
八代, 尚3 Browse this author
宮本, 佳明4 Browse this author →KAKEN DB
山浦, 剛5 Browse this author
富田, 浩文6 Browse this author
Authors(alt): Sato, Yousuke1
Nishizawa, Seiya2
Yashiro, Hisashi3
Miyamot, Yoshiaki4
Yamaura, Tsuyoshi5
Tomita, Hirofumi6
Issue Date: 31-Mar-2014
Publisher: 北海道大学低温科学研究所
Journal Title: 低温科学
Journal Title(alt): Low Temperature Science
Volume: 72
Start Page: 265
End Page: 283
Abstract: 本稿では層積雲を対象とした数値実験の結果を用いて, 衛星観測から提唱された二つのダイアグラム(1:雲粒有効半径と光学的厚さの相関パターン;RE-COTパターン, 2:Contoured FrequencyOptical Depth Diagram;CFODD)の時系列を作成し, 先行研究で議論されている雲の成長過程を検証した. 結果からCFODDは雲の鉛直情報を含んでいるためRE-COTパターンより雲の成長過程を効率的に抽出できることが示唆され, 雲の鉛直情報を衛星観測から導出することの重要性を示唆した. これらは数値モデルの結果を基に衛星観測に提言を行うという, 計算科学から雲・エアロゾル科学への貢献の1例である.
This study conducted simulations of stratocumulus using a fully compressible Large Eddy Simulation (LES) model. Using the three-dimensional LES,we investigated the temporal evolution of two types of diagram:(1) the Contoured Frequency Optical Depth Diagram (CFODD), and (2) the correlation pattern between the clouddroplet effective radius and the cloud optical thickness (RE-COT pattern). Our results suggest that part of the cloud lifecycle (i.e., the transition from the non-drizzle to drizzle stage) can be expressed well by the CFODD of individual clouds. However, the cloud lifecycle on the RE-COT pattern was obscure. This advantage of CFODD over the RE-COT pattern arises because the CFODD uses vertical information in the inner cloud, whereas the effective radius of the RE-COT diagram represents properties near the cloud top. Our results emphasize that future satellite observations should retrieve vertical information. This is an example of the contribution of computational science to cloud and aerosol science, and indicates that numerical simulations can be used to augment satellite observations.
Description: Ⅴ. 数値モデルで観る雲・エアロゾル相互作用
Type: bulletin (article)
Appears in Collections:低温科学 = Low Temperature Science > 第72巻

Submitter: 低温科学研究所図書室

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