Browsing by Author "Engelmann, Ronny"

Now showing items 1-11 of 11

    • Aerosol absorption profiling from the synergy of lidar and sun-photometry : The ACTRIS-2 campaigns in Germany, Greece and Cyprus 

      Tsekeri, Alexandra; Amiridis, Vassilis; Lopatin, Anton; Marinou, Eleni; Giannakaki, Eleni; Pikridas, Michael; Sciare, Jean; Liakakou, Eleni; Gerasopoulos, Evangelos; Duesing, Sebastian; Corbin, Joel C.; Gysel, Martin; Bukowiecki, Nicolas; Baars, Holger; Engelmann, Ronny; Wehner, Birgit; Kottas, Michael; Mamali, Dimitra; Kokkalis, Panagiotis; Raptis, Panagiotis I.; Stavroulas, Iasonas; Keleshis, Christos; Müller, Detlef; Solomos, Stavros; Binietoglou, Ioannis; Mihalopoulos, Nikolaos; Papayannis, Alexandros; Stachlewska, Iwona S.; Igloffstein, Julia; Wandinger, Ulla; Wandinger, Ulla; Dubovik, Oleg; Goloub, Philippe (2018-04-13)
      Aerosol absorption profiling is crucial for radiative transfer calculations and climate modelling. Here, we utilize the synergy of lidar with sun-photometer measurements to derive the absorption coefficient and single ...

    • Comparison of Raman Lidar Observations of Water Vapor with COSMO-DE Forecasts during COPS 2007 

      Herold, Christian; Althausen, Dietrich; Mueller, D.; Tesche, Matthias; Seifert, Patric; Engelmann, Ronny; Flamant, Cyrille; Bhawar, Rohini; Di Girolamo, Paolo (2011-12)
      Water vapor measurements with the multiwavelength Raman lidar Backscatter Extinction Lidar-Ratio Temperature Humidity Profiling Apparatus (BERTHA) were performed during the Convective and Orographically-induced Precipitation ...

    • Doppler lidar studies of heat island effects on vertical mixing of aerosols during SAMUM-2 

      Engelmann, Ronny; Ansmann, Albert; Horn, Stefan; Seifert, Patric; Althausen, Dietrich; Tesche, Matthias; Esselborn, Michael; Fruntke, Julia; Lieke, Kirsten; Freudenthaler, Volker; Gross, Silke (2011-09-01)
      A wind Doppler lidar was deployed next to three aerosol lidars during the SAMUM-2 campaign on the main island of Cape Verde. The effects of the differential heating of the island and the surrounding ocean and the orographic ...

    • Dust and smoke transport from Africa to South America : Lidar profiling over Cape Verde and the Amazon rainforest 

      Ansmann, Albert; Baars, Holger; Tesche, Matthias; Mueller, D.; Althausen, Dietrich; Engelmann, Ronny; Pauliquevis, Theotonio; Artaxo, Paulo (2009-06-02)
      Quasi-simultaneous vertically resolved multiwavelength aerosol Raman lidar observations were conducted in the near field (Praia, Cape Verde, 15 degrees N, 23.5 degrees W) and in the far field (Manaus, Amazon basin, Brazil, ...

    • Four-dimensional variational data analysis of water vapor Raman lidar data and their impact on mesoscale forecasts 

      Grzeschik, Matthias; Bauer, Hans Stefan; Wulfmeyer, Volker; Engelbart, Dirk; Wandinger, Ulla; Mattis, Ina; Althausen, Dietrich; Engelmann, Ronny; Tesche, Matthias; Riede, Andrea (2008-08)
      The impact of water vapor observations on mesoscale initial fields provided by a triangle of Raman lidar systems covering an area of about 200 km × 200 km is investigated. A test case during the Lindenberg Campaign for ...

    • Lidar observations of the vertical aerosol flux in the planetary boundary layer 

      Engelmann, Ronny; Wandinger, Ulla; Ansmann, Albert; Mueller, D.; Zeromskis, Egidijus; Althausen, Dietrich; Wehner, Birgit (2008-08)
      The vertical aerosol transport in the planetary boundary layer (PBL) is investigated with lidars. Profiles of the vertical wind velocity are measured with a 2-mu m Doppler wind lidar. Aerosol parameters are derived from ...

    • Particle backscatter, extinction, and lidar ratio profiling with Raman lidar in south and north China 

      Tesche, Matthias; Ansmann, Albert; Mueller, D.; Althausen, Dietrich; Engelmann, Ronny; Hu, Min; Zhang, Yuanghang (2007-09-01)
      Aerosol Raman lidar observations of profiles of the particle extinction and backscatter coefficients and the respective extinction-to-backscatter ratio (lidar ratio) were performed under highly polluted conditions in the ...

    • PollyNET - a network of multiwavelength polarization Raman lidars 

      Althausen, Dietrich; Engelmann, Ronny; Baars, Holger; Heese, Birgit; Kanitz, Thomas; Komppula, M.; Giannakaki, Eleni; Pfuller, Anne; Maria Silva, Ana; Preiler, Jana; Wagner, Frank; Rascado, Juan Luis; Pereira, Sergio; Lim, Jae Hyun; Young Ahn, Joon; Tesche, Matthias; Stachlewska, Iwona S. (SPIE, 2013-10-22)
      PollyNET is a growing global network of automatized multiwavelength polarization Raman lidars of type Polly (Althausen et al., 2009). The goal of this network is to conduct advanced remote measurements of aerosol profiles ...

    • Portable Raman Lidar Polly(XT) for Automated Profiling of Aerosol Backscatter, Extinction, and Depolarization 

      Althausen, Dietrich; Engelmann, Ronny; Baars, Holger; Heese, Birgit; Ansmann, Albert; Mueller, D.; Komppula, Mika (2009-11)
      Two versions of the portable aerosol Raman lidar system (Polly) are presented. First, the two-channel prototype is depicted. It has been developed for the independent and simultaneous determination of particle backscatter ...

    • Retrieval of ice-nucleating particle concentrations from lidar observations and comparison with UAV in situ measurements 

      Marinou, Eleni; Tesche, Matthias; Nenes, Athanasios; Ansmann, Albert; Schrod, Jann; Mamali, Dimitra; Tsekeri, Alexandra; Pikridas, Michael; Baars, Holger; Engelmann, Ronny; Voudouri, Kalliopi-Artemis; Solomos, Stavros; Sciare, Jean; Gross, Silke; Ewald, Florian; Amiridis, Vassilis (2019-09-09)
      Aerosols that are efficient ice-nucleating particles (INPs) are crucial for the formation of cloud ice via heterogeneous nucleation in the atmosphere. The distribution of INPs on a large spatial scale and as a function of ...

    • The unprecedented 2017-2018 stratospheric smoke event : Decay phase and aerosol properties observed with the EARLINET 

      Baars, Holger; Ansmann, Albert; Ohneiser, Kevin; Haarig, Moritz; Engelmann, Ronny; Althausen, Dietrich; Hanssen, Ingrid; Gausa, Michael; Pietruczuk, Aleksander; Szkop, Artur; Stachlewska, Iwona S.; Wang, Dongxiang; Reichardt, Jens; Skupin, Annett; Mattis, Ina; Trickl, Thomas; Vogelmann, Hannes; Navas-Guzmán, Francisco; Haefele, Alexander; Acheson, Karen; Ruth, Albert A.; Tatarov, Boyan; Müller, Detlef; Hu, Qiaoyun; Podvin, Thierry; Goloub, Philippe; Veselovskii, Igor; Pietras, Christophe; Haeffelin, Martial; Fréville, Patrick; Sicard, Michaël; Comerón, Adolfo; García, Alfonso Javier Fernández; Menéndez, Francisco Molero; Córdoba-Jabonero, Carmen; Guerrero-Rascado, Juan Luis; Alados-Arboledas, Lucas; Bortoli, Daniele; Costa, Maria João; Dionisi, Davide; Liberti, Gian Luigi; Wang, Xuan; Sannino, Alessia; Papagiannopoulos, Nikolaos; Boselli, Antonella; Mona, Lucia; D'Amico, Giuseppe; Romano, Salvatore; Perrone, Maria Rita; Belegante, Livio; Nicolae, Doina; Grigorov, Ivan; Gialitaki, Anna; Amiridis, Vassilis; Soupiona, Ourania; Papayannis, Alexandros; Mamouri, Rodanthi Elisaveth; Nisantzi, Argyro; Heese, Birgit; Hofer, Julian; Schechner, Yoav Y.; Wandinger, Ulla; Pappalardo, Gelsomina (2019-12-13)
      Six months of stratospheric aerosol observations with the European Aerosol Research Lidar Network (EARLINET) from August 2017 to January 2018 are presented. The decay phase of an unprecedented, record-breaking stratospheric ...