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Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport

Pisso, I. and Real, E. and Law, K. S. and Legras, B. and Bousserez, N. and Attié, J. L. and Schlager, H. (2009) Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport. Journal of Geophysical Research, 114 (D19301), pp. 1-11. DOI: 10.1029/2008JD011289.

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Official URL: http://www.agu.org/pubs/crossref/2009/2008JD011289.shtml

Abstract

The dispersion and mixing of pollutant plumes during long-range transport across the North Atlantic is studied using ensembles of diffusive backward trajectories in order to estimate turbulent diffusivity coefficients in the free troposphere under stratified flow conditions. Values of the order of 0.3�1 m2 s�1 and 1 �� 104 m2 s�1 for the vertical and horizontal diffusivity coefficients Dv and Dh , respectively, are derived. Uncertainties related to the method are discussed, and results are compared with previous estimates of atmospheric mixing rates. These diffusivity estimates also yield an estimate of the vertical/horizontal aspect ratio of tracer structures in the troposphere. Results from this case study are used to estimate grid resolutions needed to accurately simulate the intercontinental transport of pollutants as being of the order of 500 m in the vertical and at least 40 km in the horizontal. This work forms the basis of high-resolution chemical simulations using ensembles of diffusive backward trajectories.

Document Type:Article
Title:Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport Estimation of mixing in the troposphere from Lagrangian trace gas reconstructions during long-range pollution plume transport
Authors:
AuthorsInstitution or Email of Authors
Pisso, I.LATMOS, Paris, F
Real, E.LATMOS, Paris, F
Law, K. S.LATMOS, Paris, F
Legras, B.CNRS/ Toulouse, F
Bousserez, N.CNRS/ Toulouse, F
Attié, J. L.CNRS/ Toulouse, F
Schlager, H.DLR
Date:2009
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:114
DOI:10.1029/2008JD011289
Page Range:pp. 1-11
Status:Published
Keywords:Long-range transport, Lagrangian study, dispersion
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 > Atmospheric Trace Species
Deposited By: Yasemin Yilmaz
Deposited On:15 Dec 2009 15:34
Last Modified:23 Jan 2014 11:36

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