Tesche, M. and Müller, D. and Groß, S. and Ansmann, A. and Althausen, D. and Freudenthaler, T. and Weinzierl, B. and Veira, A. and Petzold, A. (2011) Optical and microphysical properties of smoke over Cape Verde inferred from multiwavelength lidar measurements. Tellus B - Chemical and Physical Meteorology, 63B, pp. 677-694. Taylor & Francis. doi: 10.1111/j.1600-0889.2011.00549.x.
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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0889.2011.00549.x/pdf
Abstract
Lidar measurements of mixed dust/smoke plumes over the tropical Atlantic ocean were carried out during the winter campaign of SAMUM-2 at Cape Verde. Profiles of backscatter and extinction coefficients, lidar ratios, and Ångstr¨om exponents related to pure biomass-burning aerosol from southern West Africa were extracted from these observations. Furthermore, these findings were used as input for an inversion algorithm to retrieve microphysical properties of pure smoke. Seven measurement days were found suitable for the procedure of aerosol-type separation and successive inversion of optical data that describe biomass-burning smoke. We inferred high smoke lidar ratios of 87 ± 17 sr at 355 nm and 79 ± 17 sr at 532 nm. Smoke lidar ratios and Ångstr¨om exponents are higher compared to the ones for the dust/smoke mixture. These numbers indicate higher absorption and smaller sizes for pure smoke particles compared to the dust/smoke mixture. Inversion of the smoke data set results in mean effective radii of 0.22 ± 0.08 μm with individual results varying between 0.10 and 0.36 μm. The single-scattering albedo for pure biomass-burning smoke was found to vary between 0.63 and 0.89 with a very low mean value of 0.75 ± 0.07. This is in good agreement with findings of airborne in situ measurements which showed values of 0.77 ± 0.03. Effective radii from the inversion were similar to the ones found for the fine mode of the in situ size distributions.
Item URL in elib: | https://elib.dlr.de/70587/ | ||||||||||||||||||||||||||||||
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Document Type: | Article | ||||||||||||||||||||||||||||||
Title: | Optical and microphysical properties of smoke over Cape Verde inferred from multiwavelength lidar measurements | ||||||||||||||||||||||||||||||
Authors: |
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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.1600-0889.2011.00549.x | ||||||||||||||||||||||||||||||
Page Range: | pp. 677-694 | ||||||||||||||||||||||||||||||
Publisher: | Taylor & Francis | ||||||||||||||||||||||||||||||
Status: | Published | ||||||||||||||||||||||||||||||
Keywords: | Lidar, SAMUM-2 | ||||||||||||||||||||||||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||||||||||||||||||||||||
HGF - Program: | Space | ||||||||||||||||||||||||||||||
HGF - Program Themes: | Earth Observation | ||||||||||||||||||||||||||||||
DLR - Research area: | Raumfahrt | ||||||||||||||||||||||||||||||
DLR - Program: | R EO - Earth Observation | ||||||||||||||||||||||||||||||
DLR - Research theme (Project): | R - LIDAR research and development, L - Climate, Weather and Environment (old) | ||||||||||||||||||||||||||||||
Location: | Oberpfaffenhofen | ||||||||||||||||||||||||||||||
Institutes and Institutions: | Institute of Atmospheric Physics > Atmospheric Trace Species | ||||||||||||||||||||||||||||||
Deposited By: | Freund, Jana | ||||||||||||||||||||||||||||||
Deposited On: | 01 Aug 2011 12:54 | ||||||||||||||||||||||||||||||
Last Modified: | 08 Mar 2018 18:52 |
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