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Optical properties of aerosol mixtures derived from sun-sky radiometry during SAMUM-2

Toledano, C. und Wiegner, M. und Groß, S. und Freudenthaler, V. und Gasteiger, J. und Müller, D. und Müller, T. und Schladitz, A. und Weinzierl, B. und Torres, B. und O’Neill, N.T. (2011) Optical properties of aerosol mixtures derived from sun-sky radiometry during SAMUM-2. Tellus B - Chemical and Physical Meteorology, 63B, Seiten 635-648. DOI: 10.1111/j.1600-0889.2011.00573.x.

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Offizielle URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1600-0889.2011.00573.x/pdf

Kurzfassung

The SAMUM-2 experiment took place in the CapeVerde islands in Januaryâ��February 2008. The colocated ground-based and airborne instruments allow the study of desert dust optical and microphysical properties in a closure experiment. The Meteorological Institute of the University of Munich deployed one sun-sky photometer and two tropospheric lidar systems. A travelling AERONET-Cimel sun-sky radiometer was also deployed. During the measurement period the aerosol scenario over Cape Verde mostly consisted of a dust layer below 2 km and a smoke-dust layer above 2â��4 km a.s.l. The Saharan dust arrived at the site from the NE, whereas the smoke originated in the African equatorial region. This paper describes the main results of the Sun photometer observations, supported by lidar information. An analysis of the variations in the aerosol optical depth (AOD) in the range 340â��1550 nm, the ��ngstr�¨om exponent, volume size distributions and single scattering albedo is presented. The aerosol mixtures are analysed by means of the fine mode fraction of the AOD provided by the sun-sky inversion data and the Spectral Deconvolution Algorithm. The mean AOD (500 nm) was 0.31, with associated low ��ngstr�¶m exponent of 0.46. Several types of events were detected within the data set, with prevalence of dust or mixtures as characterized by the ��ngstr�¶m exponents of extinction and absorption and the fine mode fraction. Aerosol properties derived from sunphotometry were compared to in situ measurements of size distribution, effective radius and single scattering albedo.

Dokumentart:Zeitschriftenbeitrag
Titel:Optical properties of aerosol mixtures derived from sun-sky radiometry during SAMUM-2
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Toledano, C.LMU Munich
Wiegner, M.LMU Munich
Groß, S.LMU Munich
Freudenthaler, V.LMU Munich
Gasteiger, J.LMU Munich
Müller, D.ift, Leipzig
Müller, T.ift, Leipzig
Schladitz, A.ift, Leipzig
Weinzierl, B.DLR
Torres, B.Valladolid Univ., Valladolid, E
O’Neill, N.T.Univ. de Sherbrooke, Sherbrooke, CND
Datum:2011
Erschienen in:Tellus B - Chemical and Physical Meteorology
Referierte Publikation:Ja
In Open Access:Ja
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:63B
DOI :10.1111/j.1600-0889.2011.00573.x
Seitenbereich:Seiten 635-648
Status:veröffentlicht
Stichwörter:Saharan Mineral Dust Experiment SAMUM
HGF - Forschungsbereich:Luftfahrt, Raumfahrt und Verkehr
HGF - Programm:Raumfahrt
HGF - Programmthema:Erdbeobachtung
DLR - Schwerpunkt:Raumfahrt
DLR - Forschungsgebiet:R EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):R - Vorhaben Atmosphären- und Klimaforschung
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Jana Freund
Hinterlegt am:26 Jan 2012 15:29
Letzte Änderung:12 Dez 2013 21:35

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