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Properties of dust aerosol particles transported to Portugal from the Sahara desert

Wagner, Frank and Bortoli, Daniele and Pereira, Sergio and Costa, Maria Joao and Silva, Ana Maria and Weinzierl, Bernadett and Esselborn, Michael and Petzold, Andreas and Rasp, Kathi and Heinold, Bernd and Tegen, Ina (2009) Properties of dust aerosol particles transported to Portugal from the Sahara desert. Tellus B - Chemical and Physical Meteorology, 61B, pp. 297-306. DOI: 10.1111/j.1600-0889.2008.00393.x.

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Official URL: http://www3.interscience.wiley.com/journal/118533053/home

Abstract

Aerosol properties of mineral particles in the far-field of an African desert dust outbreak were investigated inside the project DARPO which was linked to the experiment SAMUM. The maximum particle mass concentration was about 150 μgm<sup>-3</sup> and the corresponding scattering coefficient was 130 Mm<sup>-1</sup> which results in a mass scattering efficiency of 0.87 m2g<sup>-1</sup>. The aerosol optical depth reached values up to 0.53 and the lidar ratio was between 45 and 50 in the whole dust loaded column. A comparison between particle size distributions and refractive indices derived from different instruments and models showed in general good agreement but some minor differences could also be observed. Measurements as well as calculations with a particle transport model suggest that there is a relatively higher concentration of very large particles in the upper region of the dust layer than on the surface which is likely connected with meteorological conditions at the observational site (Évora, Portugal).

Document Type:Article
Title:Properties of dust aerosol particles transported to Portugal from the Sahara desert
Authors:
AuthorsInstitution or Email of Authors
Wagner, FrankCentro de Geofísica, Évora, P
Bortoli, DanieleCentro de Geofísica, Évora, P
Pereira, SergioCentro de Geofísica, Évora, P
Costa, Maria JoaoCentro de Geofísica, Évora, P
Silva, Ana MariaCentro de Geofísica, Évora, P
Weinzierl, BernadettUNSPECIFIED
Esselborn, MichaelUNSPECIFIED
Petzold, AndreasUNSPECIFIED
Rasp, KathiUNSPECIFIED
Heinold, BerndInstitut für Troposphärenforschung, Leipzig
Tegen, InaInstitut für Troposphärenforschung, Leipzig
Date:2009
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:61B
DOI:10.1111/j.1600-0889.2008.00393.x
Page Range:pp. 297-306
Status:Published
Keywords:SAMUM;DARPO;aerosol;long-range transport;
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:04 Feb 2009
Last Modified:12 Dec 2013 20:36

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