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Saharan dust absorption and refractive index from aircraft-based observations during SAMUM 2006

Petzold, A. and Rasp, K. and Weinzierl, Bernadett and Esselborn, M. and Hamburger, T. and Dörnbrack, A. and Kandler, K. and Schütz, L. and Knippertz, P. and Fiebig, M. and Virkkula, A. (2009) Saharan dust absorption and refractive index from aircraft-based observations during SAMUM 2006. Tellus B - Chemical and Physical Meteorology, 61B, pp. 118-130. DOI: 10.1111/j.1600-0889.2008.00383.x.

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

Abstract

During the Saharan Mineral Dust Experiment SAMUM conducted in summer 2006 in southeast Morocco, the complex refractive index of desert dust was determined from airborne measurements of particle size distributions and aerosol absorption coefficients at three different wavelengths in the blue (467 nm), green (530 nm) and red (660 nm) spectral regions. The vertical structure of the dust layers was analysed by an airborne High Spectral Resolution Lidar (HSRL). The origin of the investigated dust layers was estimated from trajectory analyses combined with Meteosat 2nd Generation (MSG) scenes and wind field data analyses. The real part n of the dust refractive index was found almost constant with values between 1.55 and 1.56 independent of the wavelength. The values of the imaginary part k varied between the blue and red spectral regions by a factor of three to ten, depending on the dust source region. Absolute values of k ranged from 3.1 to 5.2 x 10<sup>-3</sup> at 450 nm and from 0.3 to 2.5 x 10<sup>-3</sup> at 700 nm. Groupings of k values could be attributed to different source regions.

Document Type:Article
Title:Saharan dust absorption and refractive index from aircraft-based observations during SAMUM 2006
Authors:
AuthorsInstitution or Email of Authors
Petzold, A.UNSPECIFIED
Rasp, K.UNSPECIFIED
Weinzierl, BernadettUNSPECIFIED
Esselborn, M.UNSPECIFIED
Hamburger, T.UNSPECIFIED
Dörnbrack, A.UNSPECIFIED
Kandler, K.Technische Univ. Darmstadt
Schütz, L.Johannes Gutenberg Univ. Mainz
Knippertz, P.Johannes Gutenberg Univ. Mainz
Fiebig, M.Norwegian Inst. for Air Research, Kjeller, N
Virkkula, A.Finnish Meteorological Inst., Helsinki, FIN
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.1600-0889.2008.00383.x
Page Range:pp. 118-130
Status:Published
Keywords:SAMUM;aerosol;absorption;refractive index
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: Dr.rer.nat. Bernadett Weinzierl
Deposited On:18 Aug 2008
Last Modified:12 Dec 2013 20:32

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