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Airborne measurements of dust layer properties, particle size distribution and mixing state of Saharan dust during SAMUM 2006

Weinzierl, Bernadett and Petzold, A. and Esselborn, M. and Wirth, M. and Rasp, K. and Kandler, K. and Schütz, L. and Koepke, P. and Fiebig, M. (2009) Airborne measurements of dust layer properties, particle size distribution and mixing state of Saharan dust during SAMUM 2006. Tellus B - Chemical and Physical Meteorology, 61B, pp. 96-117. DOI: 10.1111/j.1600-0889.2008.00392.x.

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

Abstract

The Saharan Mineral Dust Experiment (SAMUM) was conducted in May/June 2006 in southern Morocco. As part of SAMUM, airborne in-situ measurements of the particle size distribution in the diameter range 4 nm - 100 μm were conducted. The aerosol mixing state was determined below 2.5 μm. Furthermore, the vertical structure of the dust layers was investigated with a nadir-looking High Spectral Resolution Lidar (HSRL). The desert dust aerosol exhibited two size regimes of different mixing states: below 0.5 µm, the particles had a non-volatile core and a volatile coating; larger particles above 0.5 µm consisted of non-volatile components and contained light absorbing material. In all cases, particles larger than 10 μm were present, and in 80% of the measurements no particles larger than 40 μm were present. The abundance of large particles showed almost no height dependency. The effective diameter D<sub>eff</sub> in the dust plumes investigated showed two main ranges: the first range of D<sub>eff</sub> peaked around 5 μm and the second range of D<sub>eff</sub> around 8 µm. The two ranges of D<sub>eff</sub> suggest that it may be inadequate to use one average effective diameter or one parameterisation for a typical dust size distribution.

Document Type:Article
Title:Airborne measurements of dust layer properties, particle size distribution and mixing state of Saharan dust during SAMUM 2006
Authors:
AuthorsInstitution or Email of Authors
Weinzierl, BernadettUNSPECIFIED
Petzold, A.UNSPECIFIED
Esselborn, M.UNSPECIFIED
Wirth, M.UNSPECIFIED
Rasp, K.UNSPECIFIED
Kandler, K.Technische Univ. Darmstadt
Schütz, L.Johannes Gutenberg Univ. Mainz
Koepke, P.LMU München
Fiebig, M.Norwegian Inst. for Air Research, Kjeller, N
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.1600-0889.2008.00392.x
Page Range:pp. 96-117
Status:Published
Keywords:SAMUM; desert dust; airborne measurements; dust layer structure; particle size distribution; mixing state; giant particles
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:27 Jan 2009
Last Modified:12 Dec 2013 20:32

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