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Regional modelling of Saharan dust and biomass burning smoke -� Part 1: Model description and evaluation

Heinold, B. and Tegen, I. and Schepanski, K. and Tesche, K. and Esselborn, M. and Freudenthaler, V. and Gross, S. and Kandler, K. and Knippertz, P. and Müller, D. and Schladitz, A. and Toledano, C. and Weinzierl, B. and Ansmann, A. and Althausen, D. and Müller, T. and Petzold, A. and Wiedensohler, A. (2011) Regional modelling of Saharan dust and biomass burning smoke -� Part 1: Model description and evaluation. Tellus B - Chemical and Physical Meteorology, 63B, pp. 781-799. DOI: 10.1111/j.1600-0889.2011.00570.x.

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0889.2011.00570.x/pdf

Abstract

The spatio-temporal evolution of the Saharan dust and biomass-burning plume during the SAMUM-2 field campaign in January and February 2008 is simulated at 28 km horizontal resolution with the regional model-system COSMOMUSCAT. The model performance is thoroughly tested using routine ground-based and space-borne remote sensing and local field measurements. Good agreement with the observations is found in many cases regarding transport patterns, aerosol optical thicknesses and the ratio of dust to smoke aerosol. The model also captures major features of the complex aerosol layering. Nevertheless, discrepancies in the modelled aerosol distribution occur, which are analysed in detail. The dry synoptic dynamics controlling dust uplift and transport during the dry season are well described by the model, but surface wind peaks associated with the breakdown of nocturnal low-level jets are not always reproduced. Thus, a strong dust outbreak is underestimated. While dust emission modelling is a priori more challenging, since strength and placement of dust sources depend on on-line computed winds, considerable inaccuracies also arise in observation-based estimates of biomass-burning emissions. They are caused by cloud and spatial errors of satellite fire products and uncertainties in fire emission parameters, and can lead to unrealistic model results of smoke transport.

Document Type:Article
Title:Regional modelling of Saharan dust and biomass burning smoke -� Part 1: Model description and evaluation
Authors:
AuthorsInstitution or Email of Authors
Heinold, B.ift, Leipzig
Tegen, I.ift, Leipzig
Schepanski, K.Univ of Leeds, Leeds, UK
Tesche, K.ift, Leipzig
Esselborn, M.DLR
Freudenthaler, V.LMU, München
Gross, S.LMU, München
Kandler, K.Darmstadt Univ. of Technology
Knippertz, P.Univ of Leeds, Leeds, UK
Müller, D.ift, Leipzig
Schladitz, A.ift, Leipzig
Toledano, C.LMU, München
Weinzierl, B.DLR
Ansmann, A.ift, Leipzig
Althausen, D.ift, Leipzig
Müller, T.ift, Leipzig
Petzold, A.DLR
Wiedensohler, A.ift, Leipzig
Date:2011
Journal or Publication Title:Tellus B - Chemical and Physical Meteorology
Refereed publication:Yes
In Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:63B
DOI:10.1111/j.1600-0889.2011.00570.x
Page Range:pp. 781-799
Status:Published
Keywords:desert dust, remote sensing, dust size distribution
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:01 Aug 2011 12:25
Last Modified:12 Dec 2013 21:20

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