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Numerical simulations of homogeneously nucleated natural cirrus and contrail-cirrus. Part 2: Interaction on local scale

Unterstrasser, Simon and Gierens, Klaus and Sölch, Ingo and Wirth, Martin (2017) Numerical simulations of homogeneously nucleated natural cirrus and contrail-cirrus. Part 2: Interaction on local scale. Meteorologische Zeitschrift, 26 (6), pp. 643-661. Borntraeger Science Publishers. DOI: 10.1127/metz/2016/0780 ISSN 0941-2948

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Official URL: http://dx.doi.org/10.1127/metz/2016/0780

Abstract

The interaction of contrail-cirrus and natural cirrus formed by homogeneous nucleation is studied over up to ten hours by means of a LES model equipped with a Lagrangian ice microphysics module. A pre-existing contrail evolves in an ascending air mass and becomes surrounded by natural cirrus. Such scenarios are compared to scenarios, where the ascent stops, before natural cirrus formation sets in. It is found that in high updraught cases contrail spreading is inhibited by surrounding cirrus and contrail total extinction is strongly reduced. In a slow updraught the cirrus forms later around a mature contrail and the contrail’s further evolution is not considerably perturbed by the cirrus. Analysing the simulated extinction coefficient of such a dual-origin ice cloud suggests that contrails becoming embedded in cirrus do not generally remain identifiable as such in observations. It is further demonstrated that cirrus ice crystals exist in large parts of the contrail. If the contrail is located in the middle of a moist layer and the surrounding cirrus, it can happen that the complete contrail is contaminated with cirrus ice crystals within several hours. Finally, contrail properties are computed with and without considering the co-existing cirrus ice crystals which aids the interpretation of potentially contaminated contrail observations.

Item URL in elib:https://elib.dlr.de/106635/
Document Type:Article
Title:Numerical simulations of homogeneously nucleated natural cirrus and contrail-cirrus. Part 2: Interaction on local scale
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Unterstrasser, SimonDLR, IPAUNSPECIFIED
Gierens, KlausDLR, IPAUNSPECIFIED
Sölch, IngoDLR, IPAUNSPECIFIED
Wirth, MartinDLR, IPAUNSPECIFIED
Date:December 2017
Journal or Publication Title:Meteorologische Zeitschrift
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:26
DOI :10.1127/metz/2016/0780
Page Range:pp. 643-661
Publisher:Borntraeger Science Publishers
ISSN:0941-2948
Status:Published
Keywords:Kondensstreifen, Zirrus, Flugverkehr, Large-Eddy-Simulation (LES), Lagrange'sche Mikrophysik
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Transport Meteorology
Institute of Atmospheric Physics > Lidar
Institute of Atmospheric Physics > Earth System Modelling
Deposited By: Unterstraßer, Dr. Simon
Deposited On:17 Oct 2016 12:30
Last Modified:08 Mar 2018 18:46

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