DOI: 10.1002/2014GL062729
论文题名: Sensitivity of liquid clouds to homogenous freezing parameterizations
作者: Herbert R.J. ; Murray B.J. ; Dobbie S.J. ; Koop T.
刊名: Geophysical Research Letters
ISSN: 0094-8902
EISSN: 1944-8633
出版年: 2015
卷: 42, 期: 5 起始页码: 1599
结束页码: 1605
语种: 英语
英文关键词: cloud glaciation
; cloud ice
; droplet freezing
; homogeneous nucleation
; ice nucleation
; mixed-phase clouds
Scopus关键词: Drops
; Freezing
; Glacial geology
; Nucleation
; Parameterization
; Precipitation (meteorology)
; Research laboratories
; Temperature distribution
; Cloud glaciation
; Homogeneous nucleation
; Ice nucleation
; Laboratory measurements
; Mixed-phase cloud
; Radiative parameters
; Temperature dependence
; Threshold temperatures
; Ice
; cloud microphysics
; freezing
; homogeneity
; laboratory method
; nucleation
; sensitivity analysis
英文摘要: Water droplets in some clouds can supercool to temperatures where homogeneous ice nucleation becomes the dominant freezing mechanism. In many cloud resolving and mesoscale models, it is assumed that homogeneous ice nucleation in water droplets only occurs below some threshold temperature typically set at-40°C. However, laboratory measurements show that there is a finite rate of nucleation at warmer temperatures. In this study we use a parcel model with detailed microphysics to show that cloud properties can be sensitive to homogeneous ice nucleation as warm as-30°C. Thus, homogeneous ice nucleation may be more important for cloud development, precipitation rates, and key cloud radiative parameters than is often assumed. Furthermore, we show that cloud development is particularly sensitive to the temperature dependence of the nucleation rate. In order to better constrain the parameterization of homogeneous ice nucleation laboratory measurements are needed at both high (>-35°C) and low (<-38° C) temperatures. © 2015. The Authors. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84925877307&doi=10.1002%2f2014GL062729&partnerID=40&md5=a6d550334bcde18033e0e232eacd50d3
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8518
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: School of Earth and Environment, University of Leeds, Leeds, United Kingdom
Recommended Citation:
Herbert R.J.,Murray B.J.,Dobbie S.J.,et al. Sensitivity of liquid clouds to homogenous freezing parameterizations[J]. Geophysical Research Letters,2015-01-01,42(5).