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Mineral Dust Observed With AERONET Sun Photometer, Raman Lidar, and In-Situ Instruments During SAMUM 2006: Shape-Dependent Particle Properties

Müller, Detlef und Ansmann, Albert und Freudenthaler, Volker und Kandler, Konrad und Toledano, C. und Hiebsch, A. und Gasteiger, J. und Esselborn, Michael und Tesche, Matthias und Heese, Birgit und Althausen, Dietrich und Weinzierl, Bernadett und Petzold, Andreas und von Hoyningen‐Huene, W. (2010) Mineral Dust Observed With AERONET Sun Photometer, Raman Lidar, and In-Situ Instruments During SAMUM 2006: Shape-Dependent Particle Properties. Journal of Geophysical Research, 115 (D11207), Seiten 1-11. DOI: 10.1029/2009JD012523.

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Offizielle URL: http://www.agu.org/journals/jd/jd1011/2009JD012523/2009JD012523.pdf

Kurzfassung

Nearly pure Saharan dust was observed with an Aerosol Robotic Network (AERONET) Sun photometer, several Raman and high spectral resolution lidars, and airborne in situ instruments during the Saharan Mineral Dust Experiment (SAMUM) 2006 in Morocco. In the framework of a case study we present particle shape‐dependent dust properties, i.e., backscatter coefficients, extinction‐to‐backscatter (lidar) ratios, and linear particle depolarization ratios. These parameters can be inferred from AERONET’s latest version of the mineral dust retrieval algorithm. The parameters can be measured with multiwavelength Raman/depolarization lidar without critical assumptions on particle shape. Lidar ratios inferred from the AERONET Sun photometer data tend to be larger than lidar ratios measured directly with lidar. Linear dust depolarization ratios were derived for several measurement wavelengths from the data products of the AERONET Sun photometer. The depolarization ratios tend to be smaller than the depolarization ratios measured with lidar. The largest differences exist in the near‐ultraviolet wavelength range. Particle axis ratios were determined with scanning electron microscopy. The axis ratio distribution differs significantly from the axis ratio distribution that is assumed in the AERONET retrievals. If the axis ratio distributions measured during SAMUM are used, the reproducibility of the lidar data products improves. The differences may in part be caused by an insufficient understanding of the light‐scattering model that is used in the AERONET algorithm. The results of the present study will be used to develop a dust light‐scattering model that will serve as the theoretical basis for the inversion of optical data into dust microphysical properties.

Dokumentart:Zeitschriftenbeitrag
Titel:Mineral Dust Observed With AERONET Sun Photometer, Raman Lidar, and In-Situ Instruments During SAMUM 2006: Shape-Dependent Particle Properties
Autoren:
AutorenInstitution oder E-Mail-Adresse der Autoren
Müller, DetlefGwangju Inst. of Science and Technology, Gwangju, South Korea
Ansmann, AlbertIfT, Leipzig
Freudenthaler, VolkerLMU, München
Kandler, KonradTU Darmstadt, Darmstadt
Toledano, C.LMU, München
Hiebsch, A.IfT, Leipzig
Gasteiger, J.LMU, München
Esselborn, MichaelDLR
Tesche, MatthiasIfT, Leipzig
Heese, BirgitIfT, Leipzig
Althausen, DietrichIfT, Leipzig
Weinzierl, BernadettDLR
Petzold, AndreasDLR
von Hoyningen‐Huene, W.Univ. Bremen, Bremen
Datum:2010
Erschienen in:Journal of Geophysical Research
Referierte Publikation:Ja
In Open Access:Nein
In SCOPUS:Ja
In ISI Web of Science:Ja
Band:115
DOI :10.1029/2009JD012523
Seitenbereich:Seiten 1-11
Status:veröffentlicht
Stichwörter:desert dust, remote sensing, dust size distribution, AERONET
HGF - Forschungsbereich:Verkehr und Weltraum (alt)
HGF - Programm:Weltraum (alt)
HGF - Programmthema:W EO - Erdbeobachtung
DLR - Schwerpunkt:Weltraum
DLR - Forschungsgebiet:W EO - Erdbeobachtung
DLR - Teilgebiet (Projekt, Vorhaben):W - Vorhaben Atmosphären- und Klimaforschung (alt)
Standort: Oberpfaffenhofen
Institute & Einrichtungen:Institut für Physik der Atmosphäre > Atmosphärische Spurenstoffe
Hinterlegt von: Jana Freund
Hinterlegt am:16 Aug 2010 17:11
Letzte Änderung:23 Jan 2014 11:36

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