DOI: 10.1002/grl.50700
论文题名: Minimalist model of ice microphysics in mixed-phase stratiform clouds
作者: Yang F. ; Ovchinnikov M. ; Shaw R.A.
刊名: Geophysical Research Letters
ISSN: 0094-8762
EISSN: 1944-8493
出版年: 2013
卷: 40, 期: 14 起始页码: 3756
结束页码: 3760
语种: 英语
英文关键词: ice number concentration
; ice water content
; mixed-phase clouds
; stochastic ice nucleation
Scopus关键词: A1. largeeddy simulations (LES)
; Ice nucleation
; Ice water content
; Microphysical property
; Mixed-phase cloud
; Mixed-phase stratiform cloud
; Number concentration
; Supercooled layer clouds
; Analytical models
; Cloud computing
; Large eddy simulation
; Models
; Nucleation
; Stochastic systems
; Ice
; aerosol
; cloud microphysics
; depositional environment
; geoaccumulation
; nucleation
; numerical model
; stochasticity
; stratiform cloud
英文摘要: The question of whether persistent ice crystal precipitation from supercooled layer clouds can be explained by time-dependent, stochastic ice nucleation is explored using an approximate, analytical model and a large-eddy simulation (LES) cloud model. The updraft velocity in the cloud defines an accumulation zone, where small ice particles cannot fall out until they are large enough, which will increase the residence time of ice particles in the cloud. Ice particles reach a quasi-steady state between growth by vapor deposition and fall speed at cloud base. The analytical model predicts that ice water content (wi) has a 2.5 power-law relationship with ice number concentration (ni). wi and ni from a LES cloud model with stochastic ice nucleation confirm the 2.5 power-law relationship, and initial indications of the scaling law are observed in data from the Indirect and Semi-Direct Aerosol Campaign. The prefactor of the power law is proportional to the ice nucleation rate and therefore provides a quantitative link to observations of ice microphysical properties. © 2013. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84880249040&doi=10.1002%2fgrl.50700&partnerID=40&md5=8eff90e819cc5a971e93188a7b96b176
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6026
Appears in Collections: 气候减缓与适应
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作者单位: Department of Physics, Michigan Technological University, Houghton, MI 49931c, United States
Recommended Citation:
Yang F.,Ovchinnikov M.,Shaw R.A.. Minimalist model of ice microphysics in mixed-phase stratiform clouds[J]. Geophysical Research Letters,2013-01-01,40(14).