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Browsing by Author "Ansmann, A."
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Profiling of fine and coarse particle mass : Case studies of Saharan dust and Eyjafjallajökull/Grimsvötn volcanic plumes
Ansmann, A.; Seifert, P.; Tesche, Matthias; Wandinger, U. (2012-10-22)The polarization lidar photometer networking (POLIPHON) method introduced to separate coarse-mode and fine-mode particle properties of Eyjafjallajokull volcanic aerosols in 2010 is extended to cover Saharan dust events as ... -
Radiative and dynamic effects of absorbing aerosol particles over the Pearl River Delta, China
Wendisch, M.; Hellmuth, O.; Ansmann, A.; Heintzenberg, J.; Engelmann, R.; Althausen, D.; Eichler, H.; Mueller, D.; Hu, M.; Zhang, Y.; Mao, J. (2008-08)Results are reported from a ground-based measurement campaign conducted in a highly polluted region in southeast of China in October-November 2004. The experiment focused on absorbing aerosol particles and their effects ... -
Raman lidar observations of aged Siberian and Canadian forest fire smoke in the free troposphere over Germany in 2003 : Microphysical particle characterization
Mueller, D.; Mattis, I.; Wandinger, U.; Ansmann, A.; Althausen, D.; Stohl, A. (2005-09-02)Dual-wavelength Raman lidar observations were regularly carried out at Leipzig (51.3 degrees N, 12.4 degrees E) from May to August 2003. The measurements showed that particle backscatter and extinction coefficients in the ... -
Relative humidity dependence of aerosol optical properties and direct radiative forcing in the surface boundary layer at Xinken in Pearl River Delta of China : An observation based numerical study
Cheng, Y. F.; Wiedensohler, A.; Eichler, H.; Heintzenberg, J.; Tesche, Matthias; Ansmann, A.; Wendisch, M.; Su, H.; Althausen, D.; Herrmann, H.; Gnauk, T.; Brüggemann, E.; Hu, M.; Zhang, Y. H. (2008-08)In a numerical study, influences of relative humidity (RH) on aerosol optical properties and direct radiative forcing in the surface boundary layer at Xinken (XK) in Pearl River Delta of China are investigated based on the ... -
Relative-humidity profiling in the troposphere with a Raman lidar
Mattis, I.; Ansmann, A.; Althausen, D.; Jaenisch, V.; Wandinger, U.; Mueller, D.; Arshinov, Y. F.; Bobrovnikov, S. M.; Serikov, I. B. (2002-10-20)We describe a Raman-lidar-based approach to acquiring profiles of the relative humidity of air. For this purpose we combined in one instrument the Raman-lidar techniques that are used for the profiling of water vapor and ... -
Retrieval of physical particle properties from lidar observations of extinction and backscatter at multiple wavelengths
Mueller, D.; Wandinger, U.; Althausen, D.; Mattis, I.; Ansmann, A. (1998-04-20)Tropospheric height profiles of five particle backscatter coefficients between 355 and 800 nm and particle extinction coefficients at 355 and 532 nm measured with a multiple-wavelength backscatter lidar and a dual-wavelength. ... -
Saharan dust and heterogeneous ice formation : Eleven years of cloud observations at a central European EARLINET site
Seifert, P.; Ansmann, A.; Mattis, I.; Wandinger, U.; Tesche, Matthias; Engelmann, R.; Mueller, D.; Perez, C.; Haustein, K. (2010-10-19)More than 2300 observed cloud layers were analyzed to investigate the impact of aged Saharan dust on heterogeneous ice formation. The observations were performed with a polarization/Raman lidar at the European Aerosol ... -
Saharan dust over a central European EARLINET-AERONET site : Combined observations with Raman lidar and Sun photometer
Mueller, D.; Mattis, I.; Wandinger, U.; Ansmann, A.; Althausen, D.; Dubovik, O.; Eckhardt, S.; Stohl, A. (2003-06-17)[1] Combined observations with an advanced aerosol water-vapor temperature Raman lidar and a Sun photometer are used for a detailed characterization of geometrical and optical properties of a continental-scale Saharan dust ... -
Scanning 6-wavelength 11-channel aerosol lidar
Althausen, D.; Mueller, D.; Ansmann, A.; Wandinger, U.; Hube, H.; Clauder, E.; Zoerner, S. (2000-11)A transportable multiple-wavelength lidar is presented, which is used for the profiling of optical and physical aerosol properties. Two Nd:YAG and two dye lasers in combination with frequency-doubling crystals emit ... -
Size matters: Influence of multiple scattering on CALIPSO light-extinction profiling in desert dust
Wandinger, U.; Tesche, Matthias; Seifert, P.; Ansmann, A.; Mueller, D.; Althausen, D. (2010-05-18)We investigate the discrepancies in measurements of light extinction and extinction-to-backsatter ratio (lidar ratio) of desert dust with CALIPSO and ground-based lidar systems. Multiwavelength polarization Raman lidar ... -
Strong particle light absorption over the Pearl River Delta (south China) and Beijing (north China) determined from combined Raman lidar and Sun photometer observations
Mueller, D.; Tesche, Matthias; Eichler, H.; Engelmann, R.; Althausen, D.; Ansmann, A.; Cheng, Y. F.; Zhang, Y. H.; Hu, M. (2006-10-24)[1] Particle size and absorption properties have been determined from combined one-wavelength Raman lidar and Sun photometer measurements in the Pearl River Delta (South China) in October 2004, and in Beijing (North China) ... -
Technical Note: One year of Raman-lidar measurements in Gual Pahari EUCAARI site close to New Delhi in India - Seasonal characteristics of the aerosol vertical structure
Komppula, M.; Mielonen, T.; Arola, A.; Korhonen, K.; Lihavainen, H.; Hyvarinen, A. -P.; Baars, H.; Engelmann, R.; Althausen, D.; Ansmann, A.; Mueller, D.; Panwar, T. S.; Hooda, R. K.; Sharma, V. P.; Kerminen, V. -M.; Lehtinen, K. E. J.; Viisanen, Y. (2012)One year of multi-wavelength (3 backscatter + 2 extinction + 1 depolarization) Raman lidar measurements at Gual Pahari, close to New Delhi, were analysed. The data was split into four seasons: spring (March-May), summer ... -
Ten years of multiwavelength Raman lidar observations of free-tropospheric aerosol layers over central Europe : Geometrical properties and annual cycle
Mattis, I.; Mueller, D.; Ansmann, A.; Wandinger, U.; Preissler, J.; Seifert, P.; Tesche, Matthias (2008-10-27)We present geometrical properties and seasonal variations of appearance of aerosol particle pollution in the free troposphere over the central European lidar site at Leipzig, Germany. The data set has been acquired with ... -
Unexpectedly high aerosol load in the free troposphere over central Europe in spring/summer 2003
Mattis, I.; Ansmann, A.; Wandinger, U.; Mueller, D. (2003-11-29)We observed particle extinction coefficients of 5 30 Mm(-1) and particle optical depths of 0.03 - 0.11 at UV and visible wavelengths in the free troposphere from May to July, 2003. In May and early June distinct aerosol ... -
Vertical profiling of optical and physical particle properties over the tropical Indian Ocean with six-wavelength lidar 1. Seasonal cycle
Mueller, D.; Franke, K.; Wagner, F.; Althausen, D.; Ansmann, A.; Heintzenberg, J. (2001-11-27)For the first time the seasonal cycle of optical and physical particle properties over the Indian Ocean was observed with a six-wavelength aerosol lidar. The measurements were performed in the framework of the Indian Ocean ... -
Vertical profiling of the Indian aerosol plume with six-wavelength lidar during INDOEX : A first case study
Ansmann, A.; Althausen, D.; Wandinger, U.; Franke, K.; Mueller, D.; Wagner, F.; Heintzenberg, J. (2000-04-01)During the Intensive Field Phase (IFP) of the Indian Ocean Experiment (INDOEX) lasting from 15 February to 26 March 1999, a large number of pollution outbreaks from India and southeast Asia were observed with a unique ... -
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 ... -
Volcanic ash over Scandinavia originating from the Grímsvötn eruptions in May 2011
Tesche, Matthias; Glantz, P.; Johansson, C.; Norman, M.; Hiebsch, A.; Ansmann, A.; Althausen, D.; Engelmann, R.; Seifert, P. (2012-05-16)A volcanic ash plume that originated from the eruptions of Iceland's Grímsvötn volcano in May 2011 was observed over the Nordic countries using a combination of satellite observations and ground-based measurements. The ...