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The May/June 2008 Saharan dust event over Munich: Intensive aerosol parameters from lidar measurements

Wiegner, Matthias and Groß, Silke and Freudenthaler, Volker and Schnell, Franziska and Gasteiger, Josef (2011) The May/June 2008 Saharan dust event over Munich: Intensive aerosol parameters from lidar measurements. Journal of Geophysical Research, 116 (D23213), pp. 1-15. DOI: 10.1029/2011JD016619.

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Official URL: http://www.agu.org/pubs/crossref/2011/2011JD016619.shtml

Abstract

At the end of May 2008 one of the strongest Saharan dust outbreaks ever reached Central Europe. This event gave us the opportunity to extend our series of studies on Saharan dust characterization, which includes measurements near the source (SAMUM‐1, Morocco) and in the regime of mid range transport (SAMUM‐2, Cape Verde). The optical properties of the aerosol particles as a function of time and height are derived from data of the two Raman depolarization‐lidar systems MULIS and POLIS at Munich and Maisach (Germany), respectively. Measurements include the extensive properties of the particles, backscatter coefficient bp and extinction coefficient ap, and the intensive particle properties, linear depolarization ratio dp and lidar ratio Sp. All quantities are derived at two wavelengths, l = 355 nm and l = 532 nm. The focus of the study is on the intensive properties, for which we found on average dp = 0.30 at 355 nm and dp = 0.34 at 532 nm. The systematic errors were typically larger than the dp‐difference at the two wavelengths. With respect to the lidar ratio, we found Sp = 59 sr for both wavelengths, with an uncertainty range between ±4 sr and ±10 sr. These values are quite similar to the results from the SAMUM campaigns. Thus, our results suggest that the intensive optical properties of Saharan dust do not change significantly if the transport time is less than one week. However, more case studies in the far‐range regime are required to scrutinize this statement. To further refine conclusions with respect to the wavelength dependence of dp a further reduction of the errors is desired.

Document Type:Article
Title:The May/June 2008 Saharan dust event over Munich: Intensive aerosol parameters from lidar measurements
Authors:
AuthorsInstitution or Email of Authors
Wiegner, MatthiasLMU, München
Groß, SilkeDLR
Freudenthaler, VolkerLMU, München
Schnell, FranziskaLMU, München
Gasteiger, JosefLMU, München
Date:15 December 2011
Journal or Publication Title:Journal of Geophysical Research
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:116
DOI:10.1029/2011JD016619
Page Range:pp. 1-15
Series Name:American Geophysical Union
Status:Published
Keywords:SAMUM, EARLINET, dust, lidar
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
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Lidar
Deposited By: Silke Martha Groß
Deposited On:29 Dec 2011 14:10
Last Modified:23 Jan 2014 11:36

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