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Study of contrail microphysics in the vortex phase with a Lagrangian particle tracking model

Unterstrasser, Simon and Sölch, Ingo (2010) Study of contrail microphysics in the vortex phase with a Lagrangian particle tracking model. Atmospheric Chemistry and Physics, 10, pp. 10003-10015. Copernicus Productions. DOI: 10.5194/acp-10-10003-2010.

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Official URL: http://www.atmos-chem-phys.net/10/10003/2010

Abstract

Crystal sublimation/loss is a dominant feature of the contrail evolution during the vortex phase and has a substantial impact on the later contrail-to-cirrus transition. Previous studies showed that the fraction of crystals surviving the vortex phase depends primarily on relative humidity, temperature and the aircraft type. An existing model for contrail vortex phase simulations (with a 2-moment bulk microphysics scheme) was upgraded with a newly developed state-of-the-art microphysics module (LCM) which uses Lagrangian particle tracking. This allows for explicit process-oriented modelling of the ice crystal size distribution in contrast to the bulk approach. We show that it is of great importance to employ an advanced microphysics scheme to determine the crystal loss during the vortex phase. The LCM-model shows even larger sensitivities to the above mentioned key parameters than previously estimated with the bulk model. The impact of the initial crystal number is studied and for the first time also the initial width of the crystal size distribution. Both are shown to be relevant. This corroborates the need for a realistic representation of microphysical processes and knowledge of the ice phase characteristics.

Document Type:Article
Title:Study of contrail microphysics in the vortex phase with a Lagrangian particle tracking model
Authors:
AuthorsInstitution or Email of Authors
Unterstrasser, SimonUNSPECIFIED
Sölch, IngoUNSPECIFIED
Date:25 October 2010
Journal or Publication Title:Atmospheric Chemistry and Physics
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:10
DOI:10.5194/acp-10-10003-2010
Page Range:pp. 10003-10015
Publisher:Copernicus Productions
Status:Published
Keywords:contrail, vortexphase, sublimation, contrail-cirrus, microphysics, numerical modeling
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:L VU - Air Traffic and Environment (old)
DLR - Research area:Aeronautics
DLR - Program:L VU - Air Traffic and Environment
DLR - Research theme (Project):L - Air Traffic and Weather (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Dynamics
Deposited By: Dr. Simon Unterstraßer
Deposited On:08 Nov 2010 09:53
Last Modified:12 Dec 2013 21:04

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