DOI: 10.1002/grl.50442
论文题名: On the size distribution of cloud holes in stratocumulus and their relationship to cloud-top entrainment
作者: Yamaguchi T. ; Feingold G.
刊名: Geophysical Research Letters
ISSN: 0094-9010
EISSN: 1944-8741
出版年: 2013
卷: 40, 期: 10 起始页码: 2450
结束页码: 2454
语种: 英语
英文关键词: cloud holes
; cloud-top entrainment
; stratocumulus topped boundary layer
Scopus关键词: Entrainment velocities
; Lagrangian
; Satellite observations
; Small Hole
; Stratocumulus clouds
; Stratocumulus-topped boundary layers
; Tracking models
; Vertical velocity
; Lagrange multipliers
; Large eddy simulation
; Size distribution
; Clouds
; cloud
; eddy
; Lagrangian analysis
; numerical model
; size distribution
; stratocumulus
; velocity
英文摘要: The relationship between cloud-top entrainment and cloud hole size at the top of stratocumulus clouds is explored with large-eddy simulations and a Lagrangian parcel tracking model. The cloud-hole size distribution follows a negative power law, in excellent agreement with satellite observation at 15 m resolution. As a result of the steep decrease in the number of holes with increasing size, the number of entrained Lagrangian parcels also decreases with increasing hole size (negative power law), even though the number of entrainment events per hole increases with increasing hole size (positive power law). Thus, entrainment preferentially occurs in small holes. Further analysis shows that the domain averaged entrainment velocity is a reasonable approximation to the domain averaged cloud-hole vertical velocity, and dominated by contributions from the small holes. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879979264&doi=10.1002%2fgrl.50442&partnerID=40&md5=29579d76a2d7b063dd18e67c3c0b0f64
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6274
Appears in Collections: 气候减缓与适应
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作者单位: Cooperative Institute for Research in Environmental Sciences, University of Colorado, NOAA Earth System Research Laboratory, Boulder, CO, United States
Recommended Citation:
Yamaguchi T.,Feingold G.. On the size distribution of cloud holes in stratocumulus and their relationship to cloud-top entrainment[J]. Geophysical Research Letters,2013-01-01,40(10).