Browsing by Author "Freudenthaler, V."

Now showing items 1-12 of 12

    • The 16 April 2010 major volcanic ash plume over central Europe : EARLINET lidar and AERONET photometer observations at Leipzig and Munich, Germany 

      Ansmann, A.; Tesche, Matthias; Gross, S.; Freudenthaler, V.; Seifert, P.; Hiebsch, A.; Schmidt, J.; Wandinger, U.; Mattis, I.; Mueller, D.; Wiegner, M. (2010-07-15)
      The optically thickest volcanic ash plume ever measured over Germany was monitored with multiwavelength Raman lidars and Sun photometer at Leipzig and Munich. When this ash layer, originating from the Eyjafjoll eruptions ...

    • Airborne observations of the Eyjafjalla volcano ash cloud over Europe during air space closure in April and May 2010 

      Schumann, U.; Weinzierl, B.; Reitebuch, O.; Schlager, H.; Minikin, A.; Forster, C.; Baumann, R.; Sailer, T.; Graf, K.; Mannstein, H.; Voigt, C.; Rahm, S.; Simmet, R.; Scheibe, M.; Lichtenstern, M.; Stock, P.; Rüba, H.; Scḧauble, D.; Tafferner, A.; Rautenhaus, M.; Gerz, T.; Ziereis, H.; Krautstrunk, M.; Mallaun, C.; Gayet, J. F.; Lieke, K.; Kandler, K.; Ebert, M.; Weinbruch, S.; Stohl, A.; Gasteiger, J.; Gro, S.; Freudenthaler, V.; Wiegner, M.; Ansmann, A.; Tesche, Matthias; Olafsson, H.; Sturm, K. (2011-03-11)
      Airborne lidar and in-situ measurements of aerosols and trace gases were performed in volcanic ash plumes over Europe between Southern Germany and Iceland with the Falcon aircraft during the eruption period of the Eyjafjalla1 ...

    • Ash and fine-mode particle mass profiles from EARLINET-AERONET observations over central Europe after the eruptions of the Eyjafjallajökull volcano in 2010 

      Ansmann, A.; Tesche, Matthias; Seifert, P.; Gross, Silke; Freudenthaler, V.; Apituley, A.; Wilson, K. M.; Serikov, I.; Linné, H.; Heinold, B.; Hiebsch, A.; Schnell, F.; Schmidt, J.; Mattis, I.; Wandinger, U.; Wiegner, M. (2011-01-01)
      A combined lidar-photometer method that permits the retrieval of vertical profiles of ash and non-ash (fine-mode) particle mass concentrations is presented. By using a polarization lidar, the contributions of non-ash and ...

    • EARLINET observations of the 14-22-May long-range dust transport event during SAMUM 2006 : validation of results from dust transport modelling 

      Mueller, D.; Heinold, B.; Tesche, Matthias; Tegen, I.; Althausen, D.; Arboledas, L. Alados; Amiridis, V.; Amodeo, A.; Ansmann, A.; Balis, D.; Comeron, A.; D'amico, G.; Gerasopoulos, E.; Guerrero-Rascado, J. L.; Freudenthaler, V.; Giannakaki, E.; Heese, B.; Iarlori, M.; Knippertz, P.; Mamouri, R. E.; Mona, L.; Papayannis, A.; Pappalardo, G.; Perrone, R. -M.; Pisani, G.; Rizi, V.; Sicard, M.; Spinelli, N.; Tafuro, A.; Wiegner, M. (2009-02)
      We observed a long-range transport event of mineral dust from North Africa to South Europe during the Saharan Mineral Dust Experiment (SAMUM) 2006. Geometrical and optical properties of that dust plume were determined with ...

    • Four-dimensional distribution of the 2010 Eyjafjallajökull volcanic cloud over Europe observed by EARLINET 

      Pappalardo, G.; Mona, L.; D'Amico, G.; Wandinger, U.; Adam, M.; Amodeo, A.; Ansmann, A.; Apituley, A.; Alados Arboledas, L.; Balis, D.; Boselli, A.; Bravo-Aranda, J. A.; Chaikovsky, A.; Comeron, A.; Cuesta, J.; De Tomasi, F.; Freudenthaler, V.; Gausa, M.; Giannakaki, E.; Giehl, H.; Giunta, A.; Grigorov, I.; Groß, S.; Haeffelin, M.; Hiebsch, A.; Iarlori, M.; Lange, D.; Linné, H.; Madonna, F.; Mattis, I.; Mamouri, R. E.; McAuliffe, M. A. P.; Mitev, V.; Molero, F.; Navas-Guzman, F.; Nicolae, D.; Papayannis, A.; Perrone, M. R.; Pietras, C.; Pietruczuk, A.; Pisani, G.; Preißler, J.; Pujadas, M.; Rizi, V.; Ruth, A. A.; Schmidt, J.; Schnell, F.; Seifert, P.; Serikov, I.; Sicard, M.; Simeonov, V.; Spinelli, N.; Stebel, K.; Tesche, Matthias; Trickl, T.; Wang, X.; Wagner, F.; Wiegner, M.; Wilson, K. M. (2013-04-29)
      The eruption of the Icelandic volcano Eyjafjallaj ökull in April-May 2010 represents a "natural experiment" to study the impact of volcanic emissions on a continental scale. For the first time, quantitative data about the ...

    • Ice formation in ash-influenced clouds after the eruption of the Eyjafjallajkull volcano in April 2010 

      Seifert, P.; Ansmann, A.; Gross, Silke; Freudenthaler, V.; Heinold, B.; Hiebsch, A.; Mattis, I.; Schmidt, J.; Schnell, F.; Tesche, Matthias; Wandinger, U.; Wiegner, M. (2011-10-27)
      The influence of volcanic ash on heterogeneous ice nucleation in tropospheric clouds is investigated on the basis of 90 observed cloud cases. The clouds were observed with polarization lidars at the two central-European ...

    • Influence of Saharan dust on cloud glaciation in southern Morocco during the Saharan Mineral Dust Experiment 

      Ansmann, A.; Tesche, Matthias; Althausen, D.; Mueller, D.; Seifert, P.; Freudenthaler, V.; Heese, B.; Wiegner, M.; Pisani, G.; Knippertz, P.; Dubovik, O. (2008-02-27)
      Multiwavelength lidar, Sun photometer, and radiosonde observations were conducted at Ouarzazate ( 30.9 degrees N, 6.9 degrees W, 1133 m above sea level, asl), Morocco, in the framework of the Saharan Mineral Dust Experiment ...

    • Mineral dust observed with AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM 2006 : Shape-dependent particle properties 

      Mueller, D.; Ansmann, A.; Freudenthaler, V.; Kandler, K.; Toledano, C.; Hiebsch, A.; Gasteiger, J.; Esselborn, M.; Tesche, Matthias; Heese, B.; Althausen, D.; Weinzierl, B.; Petzold, A.; von Hoyningen-Huene, W. (2010-06)
      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 ...

    • Mineral dust observed with AERONET Sun photometer, Raman lidar, and in situ instruments during SAMUM 2006 : Shape-independent particle properties 

      Mueller, D.; Weinzierl, B.; Petzold, A.; Kandler, K.; Ansmann, A.; Mueller, T.; Tesche, Matthias; Freudenthaler, V.; Esselborn, M.; Heese, B.; Althausen, D.; Schladitz, A.; Otto, S.; Knippertz, P. (2010-04-10)
      Aerosol Robotic Network (AERONET) Sun photometer observations were carried out at Ouarzazate, Morocco, during the Saharan Mineral Dust Experiment (SAMUM) 2006. Data from one measurement day, 19 May 2006, are used to derive ...

    • Numerical simulations of optical properties of Saharan dust aerosols with emphasis on lidar applications 

      Wiegner, M.; Gasteiger, J.; Kandler, K.; Weinzierl, B.; Rasp, K.; Esselborn, M.; Freudenthaler, V.; Heese, B.; Toledano, C.; Tesche, Matthias; Althausen, D. (2009-02-02)
      In the framework of the Saharan Mineral Dust Experiment (SAMUM) for the first time the spectral dependence of particle linear depolarization ratios was measured by combining four lidar systems. In this paper these measurements ...

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

      Toledano, C.; Wiegner, M.; Gross, S.; Freudenthaler, V.; Gasteiger, J.; Mueller, D.; Mueller, T.; Schladitz, A.; Weinzierl, B.; Torres, B.; O'Neill, N. T. (2011-09)
      The SAMUM-2 experiment took place in the Cape Verde islands in January-February 2008. The colocated ground-based and airborne instruments allow the study of desert dust optical and microphysical properties in a closure ...

    • Vertically resolved separation of dust and smoke over Cape Verde using multiwavelength Raman and polarization lidars during Saharan Mineral Dust Experiment 2008 

      Tesche, Matthias; Ansmann, A.; Mueller, D.; Althausen, D.; Engelmann, R.; Freudenthaler, V.; Gross, S. (2009-07-08)
      Multiwavelength aerosol Raman lidar in combination with polarization lidar at Praia (14.9 degrees N, 23.5 degrees W), Cape Verde, is used to separate the optical properties of desert dust and biomass burning particles as ...