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Desert dust aerosol air mass mapping in the western Sahara, using particle properties derived from space-based multi-angle imaging

Kahn, Ralph and Petzold, Andreas and Wendisch, Manfred and Bierwirth, Eike and Dinter, Tilman and Esselborn, Michael and Fiebig, Marcus and Heese, Birgit and Knippertz, Peter and Müller, Detlef and Schladitz, Alexander and von Hoyningen-Huene, Wolfgang (2009) Desert dust aerosol air mass mapping in the western Sahara, using particle properties derived from space-based multi-angle imaging. Tellus B - Chemical and Physical Meteorology, 61B, pp. 239-251. DOI: 10.1111/j.1600-0889.2008.00398.x.

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


Coincident observations made over the Moroccan desert during the Sahara mineral dust experiment (SAMUM) 2006 field campaign are used both to validate aerosol amount and type retrieved from multi-angle imaging spectroradiometer (MISR) observations, and to place the suborbital aerosol measurements into the satellite�s larger regional context. On three moderately dusty days during which coincident observations were made, MISR mid-visible aerosol optical thickness (AOT) agrees with field measurements point-by-point to within 0.05�0.1. This is about as well as can be expected given spatial sampling differences; the space-based observations capture AOT trends and variability over an extended region. The field data also validate MISR�s ability to distinguish and to map aerosol air masses, from the combination of retrieved constraints on particle size, shape and single-scattering albedo. For the three study days, the satellite observations (1) highlight regional gradients in the mix of dust and background spherical particles, (2) identify a dust plume most likely part of a density flow and (3) show an aerosol air mass containing a higher proportion of small, spherical particles than the surroundings, that appears to be aerosol pollution transported from several thousand kilometres away.

Document Type:Article
Title:Desert dust aerosol air mass mapping in the western Sahara, using particle properties derived from space-based multi-angle imaging
AuthorsInstitution or Email of Authors
Kahn, RalphNASA, Greenbelt, MD, USA
Petzold, AndreasUNSPECIFIED
Wendisch, ManfredJohannes Gutenberg-Univ. Mainz, Mainz
Bierwirth, EikeJohannes Gutenberg-Univ. Mainz, Mainz
Dinter, TilmanUniv. of Bremen, Bremen
Esselborn, MichaelUNSPECIFIED
Fiebig, MarcusNILU, Kjeller, N
Heese, BirgitInstitut für Troposphärenforschung, Leipzig
Knippertz, PeterJohannes Gutenberg-Univ. Mainz, Mainz
Müller, DetlefInstitut für Troposphärenforschung, Leipzig
Schladitz, AlexanderInstitut für Troposphärenforschung, Leipzig
von Hoyningen-Huene, WolfgangJohannes Gutenberg-Univ. Mainz, Mainz
Journal or Publication Title:Tellus B - Chemical and Physical Meteorology
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Page Range:pp. 239-251
Keywords:SAMUM; MIRS; aerosol
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: Jana Freund
Deposited On:12 Feb 2009
Last Modified:12 Dec 2013 20:36

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