- UHRA Home
- Browsing by Author
Browsing by Author "Centre for Atmospheric and Climate Physics Research"
Now showing items 341-360 of 432
-
The retrieval of the Asian dust depolarization ratio in Korea with the correction of the polarization-dependent transmission
Shin, Sungkyun; Mueller, D.; Kim, Y. J.; Tatarov, Boyan; Shin, Dongho; Seifert, Patric; Noh, Young Min (2013-01)The linear particle depolarization ratios were retrieved from the observation with a multiwavelength Raman lidar at the Gwangju Institute of Science and Technology (GIST), Korea (35.11A degrees N, 126.54A degrees E). The ... -
Retrieving the size of particles with rough and complex surfaces from two-dimensional scattering patterns
Ulanowski, Zbigniew; Hirst, Edwin; Kaye, Paul H.; Greenaway, Richard (2012-12)Scattered intensity measurement is a commonly used method for determining the size of small particles. However, it requires calibration and is subject to errors due to changes in incident irradiance or detector sensitivity. ... -
A review of operational, regional-scale, chemical weather forecasting models in Europe
Kukkonen, J.; Olsson, T.; Schultz, D. M.; Baklanov, A.; Klein, T.; Miranda, A. I.; Monteiro, A.; Hirtl, M.; Tarvainen, V.; Boy, M.; Peuch, V. -H.; Poupkou, A.; Kioutsioukis, I.; Finardi, S.; Sofiev, M.; Sokhi, R.; Lehtinen, K. E. J.; Karatzas, K.; San Jose, R.; Astitha, M.; Kallos, G.; Schaap, M.; Reimer, E.; Jakobs, H.; Eben, K. (2012-01)Numerical models that combine weather forecasting and atmospheric chemistry are here referred to as chemical weather forecasting models. Eighteen operational chemical weather forecasting models on regional and continental ... -
A risk based application of the regional model CMAQ to policy decisions
Fisher, Bernard; Chemel, C.; Sokhi, Ranjeet; Timmis, Roger (2016-01)A risk based approach to assessing compliance with EU limit values is described, using the advanced chemical transport model CMAQ to determine the regional component of NO2 and particulate matter under various conditions ... -
Road traffic impact on urban atmospheric aerosol loading at Oporto, Portugal
Oliveira, C.; Pio, C.; Caseiro, A.; Santos, P.; Nunes, T.; Mao, H.J.; Luahana, L.; Sokhi, R.S. (2010)At urban areas in south Europe atmospheric aerosol levels are frequently above legislation limits as a result of road traffic and favourable climatic conditions for photochemical formation and dust suspension. Strategies ... -
The role of land surface schemes in the regional climate model (RegCM) for seasonal scale simulations over Western Himalayas
Tiwari, Pushp Raj (2015-04-10)Climate prediction over the Western Himalaya is a challenging task due to the highly variable altitude and orientation of orographic barriers. Surface characteristics also play a vital role in climate simulations and need ... -
Rough and irregular ice crystals in mid-latitude clouds
Ulanowski, Zbigniew; Kaye, Paul H.; Hirst, Edwin; Greenaway, Richard S.; Cotton, Richard (2012-07) -
Round-the-clock temperature profiling in the troposphere with Raman lidar
Arshinov, Y.; Althausen, D.; Ansmann, S.; Bobrovnikov, S.; Mattis, I.; Mueller, D.; Serikov, I.; Wandinger, U. (INST TROPICAL MEDICINE ROTTERDAM - LEIDEN, 2003)We discuss the Raman-lidar technology of acquiring temperature profiles of the atmosphere that we have recently developed to facilitate the day-time temperature measurements with lidar. Information on the temperature profile ... -
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 ... -
Saharan Mineral Dust Experiments SAMUM-1 and SAMUM-2 : what have we learned?
Ansmann, Albert; Petzold, Andreas; Kandler, Konrad; Tegen, Ina; Wendisch, Manfred; Mueller, D.; Weinzierl, Bernadett; Mueller, Thomas; Heintzenberg, Jost (2011-09)Two comprehensive field campaigns were conducted in 2006 and 2008 in the framework of the Saharan Mineral Dust Experiment (SAMUM) project. The relationship between chemical composition, shape morphology, size distribution ... -
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 ... -
Scanning diffractometer for the rapid analysis of microparticles and biological cells
Ludlow, I.K.; Kaye, Paul H. (1979-05-01)A laser diffractometer is described which employs a novel scanned array of optical light guides to record the angular intensity variation of light scattered radially by a particle throughout an arc of 180° in approximately ... -
Scattering from long prisms : a comparison between ray tracing combined with diffraction on facets and SVM
Hesse, E.; Ulanowski, Z.; Havemann, S. (University of Bremen, 2003)A new model suitable for rapid computation of scattering on faceted dielectric objects such as ice crystals, which combines ray tracing with diffraction on flat facets, is tested against SVM. Phase functions and asymmetry ... -
Scattering from long prisms using ray tracing combined with diffraction on facets
Hesse, E.; Ulanowski, Z. (2003)A new model suitable for rapid computation of scattering on faceted dielectric objects such as ice crystals is presented. It combines ray tracing with diffraction on flat facets. The model allows retaining the ray nature ... -
Scattering of light from atmospheric ice analogues
Ulanowski, Z.; Hesse, E.; Kaye, Paul H.; Baran, A.J.; Chandrasekhar, R. (2003) -
Scattering of non-uniform incident fields by long cylinders
Ulanowski, Z.; Hesse, E.; Baran, A.J.; Kaye, Paul H.; Tongue, I. (University of Bremen, 2003)We investigate experimentally far-field scattering from cylinders with illumination non-uniform along the axis of the cylinder. Scattered intensity as a function of angle in two orthogonal directions is examined. Variation ... -
Seasonal characteristics of lidar ratios measured with a Raman lidar at Gwangju, Korea in spring and autumn
Noh, Young M.; Kim, Young J.; Mueller, D. (2008-03)Vertical profiles of aerosol lidar ratios at wavelengths of 355 and 532nm were measured with the GIST/ADEMRC (Gwangju Institute of Science & Technology/ADvanced Environmental Monitoring Research Center) multi-wavelength ... -
Seasonal prediction skill of winter temperature over North India
tiwari, p.r. (2016-04-01)The climatology, amplitude error, phase error, and mean square skill score (MSSS) of temperature predictions from five different state-of-the-art general circulation models (GCMs) have been examined for the winter ... -
Second harmonic generation : the solution for an amplitude-modulated initial pulse
Steudel, H.; Figueira de Morisson Faria, C.; Paris, M.G.A.; Kamchatnov, A.M.; Steuernagel, O. (1998)We address the initial value problem for one-dimensional second harmonic generation starting from a purely amplitude-modulated fundamental wave. A general method to solve the problem in terms of a Schrödinger equation is ...