| DOI: | 10.1002/2017JD027124
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| Scopus记录号: | 2-s2.0-85040658022
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| 论文题名: | Physical Interpretation of Mixing Diagrams |
| 作者: | Khain A.; Pinsky M.; Magaritz-Ronen L.
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| 刊名: | Journal of Geophysical Research: Atmospheres
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| ISSN: | 2169897X
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| 出版年: | 2018
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| 卷: | 123, 期:1 | | 起始页码: | 529
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| 结束页码: | 542
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| 语种: | 英语
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| 英文关键词: | Lagrangian-Eulerian model of Sc
; mixing diagrams
; scattering diagrams
; turbulent mixing in clouds
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| Scopus关键词: | boundary layer
; cloud cover
; cloud droplet
; cloud microphysics
; diagram
; in situ measurement
; size distribution
; stratocumulus
; turbulent mixing
|
| 英文摘要: | Type of mixing at cloud edges is often determined by means of mixing diagrams showing the dependence of normalized cube of the mean volume radius on the dilution level. The mixing diagrams correspond to the final equilibrium state of mixing between two air volumes. While interpreting in situ measurements, scattering diagrams are plotted in which normalized droplet concentration is used instead of dilution level. Utilization of such scattering diagrams for interpretation of in situ observations faces significant difficulties and often leads to misinterpretation of the mixing process and to uncertain conclusions concerning the mixing type. In this study we analyze the scattering diagrams obtained by means of a Lagrangian-Eulerian model of a stratocumulus cloud. The model consists of 2,000 interacting Largangian parcels which mix with their neighbors during their motion in the atmospheric boundary layer. In the diagram, each parcel is denoted by a point. Changes of microphysical parameters of the parcel are represented by movements of the point in the scattering diagram. The method of plotting the scattering diagrams using the model is in many aspects similar to that used in in situ measurements. It is shown that a scattering diagram shows snapshots of a transient mixing process. The location of points in the scattering diagrams reflects largely the history and the origin of air parcels. Location of points on scattering diagram characterizes intensity of entrainment, and different parameters of droplet size distributions (DSDs) like concentration, mean volume (or effective) radius, and DSD width. ©2017. American Geophysical Union. All Rights Reserved. |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/114700
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| Appears in Collections: | 气候减缓与适应
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作者单位: | Department of Atmospheric Sciences, Hebrew University of Jerusalem, Jerusalem, Israel
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| Recommended Citation: | |
Khain A.,Pinsky M.,Magaritz-Ronen L.. Physical Interpretation of Mixing Diagrams[J]. Journal of Geophysical Research: Atmospheres,2018-01-01,123(1)
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