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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. Taylor & Francis. 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.

Item URL in elib:https://elib.dlr.de/54943/
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 AuthorsAuthors ORCID iD
Weinzierl, BernadettUNSPECIFIEDUNSPECIFIED
Petzold, A.UNSPECIFIEDUNSPECIFIED
Esselborn, M.UNSPECIFIEDUNSPECIFIED
Wirth, M.UNSPECIFIEDUNSPECIFIED
Rasp, K.UNSPECIFIEDUNSPECIFIED
Kandler, K.Technische Univ. DarmstadtUNSPECIFIED
Schütz, L.Johannes Gutenberg Univ. MainzUNSPECIFIED
Koepke, P.LMU MünchenUNSPECIFIED
Fiebig, M.Norwegian Inst. for Air Research, Kjeller, NUNSPECIFIED
Date:2009
Journal or Publication Title:Tellus B - Chemical and Physical Meteorology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In SCOPUS:Yes
In ISI Web of Science:No
Volume:61B
DOI :10.1111/j.1600-0889.2008.00392.x
Page Range:pp. 96-117
Publisher:Taylor & Francis
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 assignment
DLR - Research area:Space
DLR - Program:W - no assignment
DLR - Research theme (Project):W - no assignment (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Weinzierl, Dr.rer.nat. Bernadett
Deposited On:27 Jan 2009
Last Modified:08 Mar 2018 18:52

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