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Auflistung nach Autor:in "Langer, Matthias"

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  • Konferenzbeitrag
    Analysis of Long-range Air Pollutant Transport Using Trajectory Residence Time Statistics
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Kaiser, August; Langer, Matthias; Mirtl, Michael; Scheifinger, Helfried; Spangl, Wolfgang
    There is a wealth of experience with trajectories and their application for various studies mostly dealing with air pollution problems. Trajectories have been applied to define air pollution source regions and calculate the dispersion of pollutants (Stohl, 1996 and 1998; Stohl and Trickl, 1999; Kaiser et al., 2000 and Kaiser et al., 2001). In this paper, results of trajectory residence time statistics are presented for the alpine background measurement site Zöbelboden, 899 masl, with special respect to the results for Sonnblick, 3105 masl, with the aim to study long-range air pollutant transport. Both stations are involved in international research programmes: Sonnblick contributes to the Global Atmosphere Watch Programme (GAW) of the WMO with the aim to study changes in the chemical composition of the atmosphere. Zöbelboden is Austria´s contribution to the International Cooperative Programme “Integrated Monitoring of Air Pollutant Effects on Ecosystems” of the Geneve Clean Air Convention within UN-ECE. The trajectory residence time statistics shows the importance of the Po basin as an ozone source, but during summer, regional ozone production also plays an important role; nitrogen oxide originates from the pre-alpine region north of the Alps, sulfur dioxide also from more distant sources (Czech Republic, southern Poland and Slovenia).
  • Konferenzbeitrag
    Transport Modelling Applications for Different Scales
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Rau, Gabriele; Baumann, Kathrin; Polreich, Erwin; Langer, Matthias
    The Environmental Department at the Central Institute for Meteorology and Geodynamics is engaged in research and consulting in the areas of air pollution transport and deposition. Three case studies are presented in order to give an overview of the different types of models that are used at the ZAMG. Local scale trajectories based on diagnostic wind field calculations are used to investigate episodes with high particle matter (PM10) concentrations at stations of the air quality network in Vienna. The dispersion of an odour plume over Vienna is simulated with a regional scale lagrangian model (Schorling & Partner, 1996) based on all available meteorological observations. Long-range trajectories, trajectory statistics and inspection of satellite images reveal the most probable source areas when large scale transport of dust caused measured high particle matter concentrations. The data from the dense observational network of the ZAMG (approximately 125 stations) and a close cooperation with national and international institutions such as municipal services and the ECMWF provide a high-quality input for the various models.