DOI: 10.1002/2013JD021418
论文题名: Large-eddy simulation study of contrail microphysics and geometry during the vortex phase and consequences on contrail-to-cirrus transition
作者: Unterstrasser S.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 21698996
出版年: 2014
卷: 119, 期: 12 起始页码: 7537
结束页码: 7555
语种: 英语
英文关键词: aviation
; contrail
; ice microphysics
; LES
; numerical modeling
Scopus关键词: Aviation
; Clouds
; Computer simulation
; Crystal structure
; Ice
; Lagrange multipliers
; Large eddy simulation
; Numerical models
; Sensitivity analysis
; A1. largeeddy simulations (LES)
; contrail
; LES
; Microphysics
; Quantitative description
; Relative humidity and temperatures
; Systematic exploration
; Three-dimensional model
; Vortex flow
英文摘要: Large-eddy simulations (LES) with Lagrangian ice microphysics were used to study the early contrail evolution during the vortex phase. Microphysical and geometrical properties of a contrail produced by a large-sized aircraft (type B777/A340) were investigated systematically for a large parameter range. Crystal loss due to adiabatic heating in the downward moving vortices was found to depend strongly on relative humidity and temperature, qualitatively similar to previous 2-D simulation results. Contrail depth is as large as 450 m for the investigated parameter range and was found to be underestimated in a previous 2-D study. Further sensitivity studies show a nonnegligible effect of the initial ice crystal size distribution and the initial ice crystal number on the crystal loss, whereas the contrail structure and ice mass evolution is only barely affected by these variations. Variation of fuel flow has the smallest effect on crystal loss. At high supersaturations, our choice of contrail spatial initialization may underestimate the ice crystal loss. The set of presented sensitivity studies is a first step toward a quantitative description of young contrails in terms of vertical extent and crystal loss. Concluding contrail-to-cirrus simulations demonstrate the relevance of vortex phase processes and its three-dimensional modeling on the later contrail-cirrus properties. Key Points LES model with detailed wake vortex dynamics and Lagrangian ice microphysics Systematic exploration of parameter space (RHi, temperature, and microphysics) Vortex phase processes affect later contrail-cirrus properties ©2014. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63056
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Deutsches Zentrum für Luft- und Raumfahrt, Institut für Physik der Atmosphäre, Oberpfaffenhofen, Wessling, Germany
Recommended Citation:
Unterstrasser S.. Large-eddy simulation study of contrail microphysics and geometry during the vortex phase and consequences on contrail-to-cirrus transition[J]. Journal of Geophysical Research: Atmospheres,2014-01-01,119(12)