Unterstrasser, Simon (2016) Properties of young contrails - parametrisation based on large-eddy simulations. Atmospheric Chemistry and Physics (ACP), 16 (4), pp. 2059-2082. Copernicus Publications. ISSN 1680-7316
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Official URL: http://www.atmos-chem-phys.net/16/2059/2016/
Abstract
Contrail–cirrus is probably the largest climate forcing from aviation. The evolution of contrail–cirrus and its radiative impact depends not only on a multitude of atmospheric parameters, but also on the geometric and microphysical properties of the young contrails evolving into contrail–cirrus. The early evolution of contrails (t < 5 min) is dominated by an interplay of ice microphysics and wake vortex dynamics. Young contrails may undergo a fast vertical expansion due to a descent of the wake vortices and may lose a substantial fraction of their ice crystals due to adiabatic heating. The geometric depth H and total ice crystal number N of young contrails are highly variable and depend on many environmental and aircraft parameters. Both properties, H and N, affect the later properties of the evolving contrail–cirrus, as they control the extent of shear-induced spreading and sedimentation losses. In this study, we provide parametrisations of H and N after 5 min taking into account the effects of temperature, relative humidity, thermal stratification and aircraft type (mass, wing span, fuel burn). The parametrisations rely on a large data set of recent large-eddy simulations of young contrails. They are suited to be incorporated in larger-scale models in order to refine the present-day contrail initialisations by considering the processes that strongly affect the contrail evolution during the vortex phase.
Item URL in elib: | https://elib.dlr.de/103196/ | ||||||
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Document Type: | Article | ||||||
Title: | Properties of young contrails - parametrisation based on large-eddy simulations | ||||||
Authors: |
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Date: | 24 February 2016 | ||||||
Journal or Publication Title: | Atmospheric Chemistry and Physics (ACP) | ||||||
Refereed publication: | Yes | ||||||
Open Access: | Yes | ||||||
Gold Open Access: | Yes | ||||||
In SCOPUS: | Yes | ||||||
In ISI Web of Science: | Yes | ||||||
Volume: | 16 | ||||||
Page Range: | pp. 2059-2082 | ||||||
Publisher: | Copernicus Publications | ||||||
ISSN: | 1680-7316 | ||||||
Status: | Published | ||||||
Keywords: | Contrail, wake vortex, LES, biofuel | ||||||
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 | ||||||
Deposited By: | Unterstraßer, Dr. Simon | ||||||
Deposited On: | 25 Feb 2016 07:16 | ||||||
Last Modified: | 02 May 2019 13:59 |
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