DOI: 10.1002/grl.50445
论文题名: Empirical relationship between entrainment rate and microphysics in cumulus clouds
作者: Lu C. ; Niu S. ; Liu Y. ; Vogelmann A.M.
刊名: Geophysical Research Letters
ISSN: 0094-9072
EISSN: 1944-8803
出版年: 2013
卷: 40, 期: 10 起始页码: 2333
结束页码: 2338
语种: 英语
英文关键词: cloud microphysics
; cumulus
; entrainment mixing mechanism
; entrainment rate
; observation
Scopus关键词: Cloud microphysics
; cumulus
; Entrainment rates
; Mixing mechanisms
; observation
; Clouds
; Drops
; Physics
; Size distribution
; Mixing
; cloud droplet
; cloud microphysics
; cumulus
; empirical analysis
; entrainment
; fractionation
; homogeneity
; observational method
; Great Plains
英文摘要: The relationships between fractional entrainment rate and key microphysical quantities (e.g., liquid water content, droplet number concentration, volume mean radius, and standard deviation of cloud droplet size distributions) in shallow cumuli are empirically examined using in situ aircraft observations from the Routine Atmospheric Radiation Measurement Aerial Facility Clouds with Low Optical Water Depths Optical Radiative Observations (RACORO) field campaign over the Atmospheric Radiation Measurement Southern Great Plains site. The results show that the microphysical quantities examined generally exhibit strong relationships with entrainment rate and that the relationships collectively suggest the dominance of homogeneous entrainment mixing, which is unfavorable to the formation of large droplets and the initiation of warm rain in the clouds. The dominance of the homogeneous mixing mechanism is further substantiated by the dependency on entrainment rate of relationships among various microphysical variables and of cloud droplet size distributions. The dominance of this mechanism is also quantitatively confirmed by examining the degree of homogeneous mixing in the clouds. The dominance of homogeneous mixing may be an important reason why none of the cumulus clouds studied was drizzling. © 2013 American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879903023&doi=10.1002%2fgrl.50445&partnerID=40&md5=7b91b3f367794253c2f39bd050a5c22e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6336
Appears in Collections: 气候减缓与适应
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作者单位: Key Laboratory of Meteorological Disaster, Ministry of Education, Nanjing University of Information Science and Technology, No. 219, Ningliu Rd., Pukou, Nanjing, Jiangsu 210044, China
Recommended Citation:
Lu C.,Niu S.,Liu Y.,et al. Empirical relationship between entrainment rate and microphysics in cumulus clouds[J]. Geophysical Research Letters,2013-01-01,40(10).