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Comparison of optical and microphysical properties of pure Saharan mineral dust observed with AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM 2006

Müller, Detlef and Lee, K. H. and Gasteiger, J. and Tesche, Matthias and Weinzierl, B. and Kandler, K. and Muller, T. and Toledano, C. and Otto, S. and Althausen, Dietrich and Ansmann, Albert (2012) Comparison of optical and microphysical properties of pure Saharan mineral dust observed with AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM 2006. Journal of Geophysical Research, 117 (D07211), pp. 1-25. DOI: 10.1029/2011jd016825.

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Official URL: http://www.agu.org/pubs/crossref/2012/2011JD016825.shtml

Abstract

The Saharan Mineral Dust Experiment (SAMUM) 2006, Morocco, aimed at the characterization of optical, physical, and radiative properties of Saharan dust. AERONET Sun photometer, several lidars (Raman and high-spectral-resolution instruments), and airborne and ground-based in situ instruments provided us with a comprehensive set of data on particle-shape dependent and particle-shape independent dust properties. We compare 4 measurement days in detail, and we carry out a statistical analysis for some of the inferred data products for the complete measurement period. Particle size distributions and complex refractive indices inferred from the Sun photometer observations and measured in situ aboard a research aircraft show systematic differences. We find differences in the wavelength-dependence of single-scattering albedo, compared to light-scattering computations that use data from SOAP (spectral optical absorption photometer). AERONET data products of particle size distribution, complex refractive index, and axis ratios were used to compute particle extinction-to-backscatter (lidar) ratios and linear particle depolarization ratios. We find differences for these parameters to lidar measurements of lidar ratio and particle depolarization ratio. Differences particularly exist at 355 nm, which may be the result of differences of the wavelength-dependent complex refractive index that is inferred by the methods employed in this field campaign. We discuss various error sources that may lead to the observed differences.

Document Type:Article
Title:Comparison of optical and microphysical properties of pure Saharan mineral dust observed with AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM 2006
Authors:
AuthorsInstitution or Email of Authors
Müller, DetlefIfT, Leipzig
Lee, K. H.Gwangju Institute of Science and Technology, Gwangju, South Korea
Gasteiger, J.LMU, München
Tesche, MatthiasIfT, Leipzig
Weinzierl, B.DLR
Kandler, K.TU Darmstadt
Muller, T.IfT, Leipzig
Toledano, C.Univ. de Valladolid, Valladolid, E
Otto, S.Univ. of Leipzig
Althausen, DietrichIfT, Leipzig
Ansmann, AlbertIfT,Leipzig
Date:2012
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:117
DOI:10.1029/2011jd016825
Page Range:pp. 1-25
Status:Published
Keywords:SAMUM 2006 focused on the characterization of mineral dust properties, quality assurance tests show discrepancies for many data products, not only flaws in the used light-scattering models may be the cause
HGF - Research field:Aeronautics, Space and Transport (old), Aeronautics, Space and Transport
HGF - Program:Space (old), Space, Aeronautics
HGF - Program Themes:W EO - Erdbeobachtung, Earth Observation, ATM and Operation
DLR - Research area:Space, Raumfahrt, Aeronautics
DLR - Program:W EO - Erdbeobachtung, R EO - Erdbeobachtung, L AO - Air Traffic Management and Operation
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old), R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Jana Freund
Deposited On:21 Aug 2012 17:03
Last Modified:23 Jan 2014 11:36

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