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Depolarization�ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006

Freudenthaler, Volker and Esselborn, Michael and Wiegner, Matthias and Heese, Birgit and Tesche, Matthias and Ansmann, Albert and Müller, Detlef and Althausen, Dietrich and Wirth, Martin and Fix, Andreas and Ehret, Gerhard and Knippertz, Peter and Toledano, Carlos and Gasteiger, Josef and Garhammar, Markus and Seefeldner, Meinhard (2009) DepolarizationâÂ�Â�ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006. Tellus B - Chemical and Physical Meteorology, 61B, pp. 165-179. DOI: 10.1111/j.1600-0889.2008.00396.x.

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


Vertical profiles of the linear particle depolarization ratio �´p of pure dust clouds were measured during the Saharan Mineral Dust Experiment (SAMUM) at Ouarzazate, Morocco (30.9�° N, -6.9�° E), close to source regions in May-June 2006 with four lidar systems at four wavelengths (355, 532, 710, and 1064 nm). The intercomparison of the lidar systems is accompanied by a discussion of the different calibration methods â�� including a new, advanced method - and a detailed error analysis. Over the whole SAMUM periode pure dust layers show a mean �´p at 532 nm of 0.31 in the range between 0.27 and 0.35 with a mean ��ngstr�¸m exponent AE (440-870 nm) of 0.18 (range 0.04 â�� 0.34), and still high mean �´p between 0.21 and 0.25 during periods with aerosol optical thickness â�¤0.1 with a mean AE of 0.76 (range 0.65 â�� 1.00), which represents a negative correlation of �´p with AE. A slight decrease of �´p with wavelength was found between 532 nm and 1064 nm from �´p = 0.31 �±0.03 to 0.27 �±0.04, respectively.

Document Type:Article
Title:Depolarization�ratio profiling at several wavelengths in pure Saharan dust during SAMUM 2006
AuthorsInstitution or Email of Authors
Freudenthaler, VolkerLMU, München
Esselborn, MichaelUNSPECIFIED
Wiegner, MatthiasLMU, München
Heese, BirgitIfT, Leipzig
Tesche, MatthiasIfT, Leipzig
Ansmann, AlbertIfT, Leipzig
Müller, DetlefIfT, Leipzig
Althausen, DietrichIfT, Leipzig
Knippertz, PeterUniv. Mainz
Toledano, CarlosLMU, München
Gasteiger, JosefLMU, München
Garhammar, MarkusLMU, München
Seefeldner, MeinhardLMU, München
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. 165-179
Keywords:Saharan dust, depolarization, lidar, SAMUM
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben LIDAR-Forschung und -Entwicklung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Michael Esselborn
Deposited On:17 Jan 2008
Last Modified:12 Dec 2013 20:29

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