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Determination of Humidity and Temperature Fluctuations Based on MOZAIC Data and Parametrisation of Persistent Contrail Coverage for General Circulation Models

Gierens, K. M. and Schumann, U. and Smit, H.G.J. and Helten, M. and Zängl, G. (1997) Determination of Humidity and Temperature Fluctuations Based on MOZAIC Data and Parametrisation of Persistent Contrail Coverage for General Circulation Models. Annales Geophysicae, 15, pp. 1057-1066.

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Official URL: http://www.copernicus.org/EGU/annales/anngeo.html

Abstract

Humidity and temperature fluctuations at pressure levels between 166 and 290 hPa on the grid scale of general circulation models for a region covered by the routes of airliners, mainly over the Atlantic, have been determined by evaluation of the data obtained with almost 2000 flights within the MOZAIC programme. It is found that the distributions of the fluctuations cannot be modelled by Gaussian distributions, because large fluctuations appear with a relatively high frequency. Lorentz distributions were used for the analytical representation of the fluctuation distributions. From these a joint probability distribution has been derived for simultaneous temperature and humidity fluctuations. This function together with the criteria for the formation and persistence of contrails are used to derive the maximum possible fractional coverage of persistent contrails in a grid cell of a GCM. This can be employed in a statistical formulation of contrail appearance in a climate model.

Item URL in elib:https://elib.dlr.de/32305/
Document Type:Article
Title:Determination of Humidity and Temperature Fluctuations Based on MOZAIC Data and Parametrisation of Persistent Contrail Coverage for General Circulation Models
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Gierens, K. M.UNSPECIFIEDUNSPECIFIED
Schumann, U.UNSPECIFIEDUNSPECIFIED
Smit, H.G.J.FZ JülichUNSPECIFIED
Helten, M.FZ JülichUNSPECIFIED
Zängl, G.UNSPECIFIEDUNSPECIFIED
Date:1997
Journal or Publication Title:Annales Geophysicae
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:15
Page Range:pp. 1057-1066
Status:Published
Keywords:contrails, temperature, humidity, fluctuations
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 - Low-Emission Air Traffic (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: DLR-Beauftragter, elib
Deposited On:29 Jan 2008
Last Modified:31 Jul 2019 19:17

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