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Particle chemical properties in the vertical column based on aircraft observations in the vicinity of Cape Verde Islands

Lieke, K. and Kandler, K. and Scheuvens, D. and Emmel, C. and von Glahn, C. and Petzold, A. and Weinzierl, B. and Veira, A. and Ebert, M. and Weinbruch, S. and Schütz, L. (2011) Particle chemical properties in the vertical column based on aircraft observations in the vicinity of Cape Verde Islands. Tellus B - Chemical and Physical Meteorology, 63B, pp. 497-511. Taylor & Francis. DOI: 10.1111/j.1600-0889.2011.00553.x

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0889.2011.00553.x/pdf

Abstract

During the second Saharan Mineral Dust Experiment (SAMUM-2) field campaign, particles with geometric diameters (d) between â�¼0.1 and 25 �¼m were collected on board of the Deutsches Zentrum f�¼r Luft- und Raumfahrt (German Aerospace Center, DLR) Falcon aircraft. Size, chemical composition and mixing state of aerosols sampled (spatially and vertically resolved) along theWest African coastline and in the Cape Verde Islands region were determined by electron microscopy. A pronounced layer structure of biomass-burning aerosol and desert dust was present for all days during the sampling period from 23 January to 6 February. The aerosol composition of the small particles (d < 0.5 �¼m) was highly variable and in cases of biomass burning strongly dominated by soot with up to 90% relative number abundance. Internal mixtures of soot particles with mineral dust were not detected. Soot was only observed to mix with secondary sulphate. The coarse particles (d > 0.5 �¼m) were dominated by silicates. In the Cape Verde Islands region mineral dust is well mixed. The determination of source regions by elemental or mineralogical composition was generally not possible, except for air masses which were transported over the Gulf of Guinea. The real part of the refractive index showed little variation. In contrast, the imaginary part strongly depended on the abundance of soot (biomass-burning aerosol) and haematite (mineral dust).

Item URL in elib:https://elib.dlr.de/70585/
Document Type:Article
Title:Particle chemical properties in the vertical column based on aircraft observations in the vicinity of Cape Verde Islands
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lieke, K.TU DarmstadtUNSPECIFIED
Kandler, K.TU DarmstadtUNSPECIFIED
Scheuvens, D.TU DarmstadtUNSPECIFIED
Emmel, C.Johannes-Gutenberg-Univ MainzUNSPECIFIED
von Glahn, C.Johannes-Gutenberg-Univ MainzUNSPECIFIED
Petzold, A.DLRUNSPECIFIED
Weinzierl, B.DLRUNSPECIFIED
Veira, A.DLRUNSPECIFIED
Ebert, M.TU DarmstadtUNSPECIFIED
Weinbruch, S.TU DarmstadtUNSPECIFIED
Schütz, L.Johannes-Gutenberg-Univ MainzUNSPECIFIED
Date:2011
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:63B
DOI :10.1111/j.1600-0889.2011.00553.x
Page Range:pp. 497-511
Publisher:Taylor & Francis
Status:Published
Keywords:SAMUM-2, Falcon, biomass-burning aerosol, mineral dust
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Atmosphären- und Klimaforschung, L - Climate, Weather and Environment (old), V - Verkehrsentwicklung und Umwelt (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Trace Species
Deposited By: Freund, Jana
Deposited On:01 Aug 2011 12:43
Last Modified:08 Mar 2018 18:52

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