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Modelling chemistry in aircraft plumes 1: comparison with observations and evaluation of a layered approach

Kraabøl, Anne Gunn and Konopka, Paul and Stordal, Frode and Schlager, Hans (2000) Modelling chemistry in aircraft plumes 1: comparison with observations and evaluation of a layered approach. Atmospheric Environment, 34, pp. 3939-3950. doi: 10.1016/S1352-2310(00)00156-4.

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Official URL: http://www.sciencedirect.com/science/journal/13522310

Abstract

An expanding plume model with chemistry has been used to study the chemical conversion of nitrogen oxides to reservoir species in aircraft plumes. The model represents the plume by several circular or cylindrical layers in order to give a more detailed description of the chemical evolution in the plume. Model simulations of plumes from two B747 aircraft monitored during the POLINAT measurement campaigns in winter 1994 and summer 1995 were performed. The NOx emission indices were 12.5 and 26.1 g kg~1, respectively. The chemical evolution was followed during the phase dominated by the aircraft-induced dispersion (vortex regime), and in the atmospheric-induced dispersion regime up to 15 h. The results were compared to observations of NO, HNO<sub>3</sub>, HNO<sub>2</sub> and CO<sub>2</sub> taken within the trailing vortices. The modelled values were in broad agreement with the observations. With a NOx emission index of 26.1 g kg~1, 60% remained as NOx after 15 h at 503N under summer conditions for emissions at 07 UT. This amount decreased to 40% when a one-layered plume was considered, suggesting that the distribution of NOx leads to di!erent oxidising potentials which again influenced the plume chemistry.

Item URL in elib:https://elib.dlr.de/53822/
Document Type:Article
Title:Modelling chemistry in aircraft plumes 1: comparison with observations and evaluation of a layered approach
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Kraabøl, Anne GunnNILU, Kjeller, NUNSPECIFIED
Konopka, PaulFZ Jülich, JülichUNSPECIFIED
Stordal, FrodeNILU, Kjeller, NUNSPECIFIED
Schlager, HansUNSPECIFIEDUNSPECIFIED
Date:2000
Journal or Publication Title:Atmospheric Environment
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Volume:34
DOI :10.1016/S1352-2310(00)00156-4
Page Range:pp. 3939-3950
Status:Published
Keywords:Aircraft emissions; Vortex regime; Dispersion regime; Plume chemistry; Tropospheric chemistry
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 - Wake Vortices (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics
Deposited By: Freund, Jana
Deposited On:02 Apr 2008
Last Modified:31 Jul 2019 19:22

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