Auflistung nach Autor/in "6023bb44-a096-462e-a706-5501957e738e"

Auflistung nach Autor/in "6023bb44-a096-462e-a706-5501957e738e"

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  • Cell broadening revisited: Results from high-resolution large-eddy simulations of cold air outbreaks 
    Schröter, M.; Raasch, S.; Jansen, H. (Boston, Massachusetts : American Meteorological Society, 2005)
    Large-eddy simulations (LES) have been carried out in order to investigate the structure and development of organized mesoscale cellular convection (MCC) during cold air outbreaks (CAOB) and to reevaluate results by Müller ...
  • Evaporation over a heterogeneous land surface: The EVA-GRIPS Project 
    Mengelkamp, H.-T.; Beyrich, F.; Heinemann, G.; Ament, F.; Bange, J.; Berger, F.; Bösenberg, J.; Foken, T.; Hennemuth, B.; Heret, C.; Huneke, C.; Johnsen, K.-P.; Kerschgens, M.; Kohsiek, W.; Leps, J.-P.; Liebethal, C.; Lohse, H.; Mauder, M.; Meijninger, W.; Raasch, S.; Simmer, C.; Spieß, T. A.; Tittebrand, A.; Uhlenbrock, J.; Zittel, P. (Boston, Massachusetts : American Meteorological Society, 2006)
    The representation of subgrid-scale surface heterogeneities in numerical weather and climate models has been a challenging problem for more than a decade. The Evaporation at Grid and Pixel Scale (EVA-GRIPS) project adds ...
  • Evolution and Features of Dust Devil-Like Vortices in Turbulent Rayleigh-Bénard Convection—A Numerical Study Using Direct Numerical Simulation 
    Giersch, S.; Raasch, S. (Hoboken, NJ : Wiley, 2021)
    Dust devils are convective vortices with a vertical axis of rotation that are made visible by entrained soil particles. These soil particles contribute to the atmospheric aerosol input, influencing the Earth radiation ...
  • Examination of the mixed layer deepening process during convection using LES 
    Noh, Y.; Goh, G.; Raasch, S. (Boston, Massachusetts : American Meteorological Society, 2010)
    Analysis of large-eddy simulation data of the ocean mixed layer under convection reveals that the contribution from wind stress decreases with time as a result of inertial oscillation in the extratropical ocean and that ...
  • Formation of a diurnal thermocline in the ocean mixed layer simulated by LES 
    Noh, Y.; Goh, G.; Raasch, S.; Gryschka, M. (Boston, Massachusetts : American Meteorological Society, 2009)
    The formation of a diurnal thermocline in the ocean mixed layer under a stabilizing buoyancy flux was simulated successfully by large-eddy simulation, reproducing various features consistent with observation. The analysis ...
  • Increased Mixing and Turbulence in the Wake of Offshore Wind Farm Foundations 
    Schultze, L.K.P.; Merckelbach, L.M.; Horstmann, J.; Raasch, S.; Carpenter, J.R. (Hoboken, NJ : Wiley, 2020)
    The addition of offshore wind farms (OWFs) to stratified regions of shelf seas poses an anthropogenic source of turbulence, in which the foundation structures remove power from the oceanic flow that is fed into turbulent ...
  • Influence of langmuir circulation on the deepening of the wind-mixed layer 
    Noh, Y.; Goh, G.; Raasch, S. (Boston, Massachusetts : American Meteorological Society, 2011)
    Analysis of large eddy simulation data reveals that Langmuir circulation (LC) induces a significant enhancement of the mixed layer deepening, only if the mixed layer depth (MLD) h is shallow and the buoyancy jump across ...
  • Large eddy simulation of particle settling in the ocean mixed layer 
    Noh, Y.; Kang, I.S.; Herold, M.; Raasch, S. (College Park, MD : American Institute of Physics, 2006)
    The settling process of suspended particles in the turbulent flow was investigated by analyzing the Lagrangian motion of a large number of particles in the ocean mixed layer simulated by large eddy simulation (LES), focusing ...
  • Large eddy simulation of thermally induced oscillations in the convective boundary layer 
    Letzel, M.O.; Raasch, S. (Boston, Massachusetts : American Meteorological Society, 2003)
    Mesoscale circulations induced by differential boundary layer heating due to surface inhomogeneities on scales of 5 km and more can significantly change the average properties and the structure of the convective boundary ...
  • A large-eddy simulation study of thermal effects on turbulent flow and dispersion in and above a street canyon 
    Park, S.-B.; Baik, J.-J.; Raasch, S.; Letzel, M.O. (Boston, Massachusetts : American Meteorological Society, 2012)
    Thermal effects on turbulent flow and dispersion in and above an idealized street canyon with a street aspect ratio of 1 are numerically investigated using the parallelized large-eddy simulation model (“PALM”). Each of ...
  • Modeling deep ocean convection: Large eddy simulation in comparison with laboratory experiments 
    Raasch, S.; Etling D. (Boston, Massachusetts : American Meteorological Society, 1998)
    A large-eddy simulation model (LES) has been applied to study deep convective processes in a stratified ocean driven by the energetic cooling at the ocean surface. Closely related to a recent laboratory experiment, the ...
  • A new research approach for observing and characterizing land-atmosphere feedback 
    Wulfmeyer, Volker; Turner, David D.; Baker, B.; Banta, R.; Behrendt, A.; Bonin, T.; Brewer, W.A.; Buban, M.; Choukulkar, A.; Dumas, E.; Hardesty, R.M.; Heus, T.; Ingwersen, J.; Lange, D.; Metzendorf, S.; Muppa, S.K.; Meyers, T.; Newsom, R.; Osman, M.; Raasch, S.; Santanello, J.C.; Senff, F.; Späth, F.; Wagner, T.; Weckwerth, T. (Boston, Massachusetts : American Meteorological Society, 2018)
    Forecast errors with respect to wind, temperature, moisture, clouds, and precipitation largely correspond to the limited capability of current Earth system models to capture and simulate land–atmosphere feedback. To ...
  • A refinement of the Millionshchikov quasi-normality hypothesis for convective boundary layer turbulence 
    Gryanik, V.M.; Hartmann, J.; Raasch, S.; Schröter, M. (Boston, Massachusetts : American Meteorological Society, 2005)
    The Millionshchikov hypothesis of quasi-normal distribution of fourth-order moments fails for convective conditions where the probability density functions of temperature and vertical velocity fluctuations are skewed. This ...
  • The role of preconditioning in the evolution of open-ocean deep convection 
    Noh, Y.; Cheon, W.G.; Raasch, S. (Boston, Massachusetts : American Meteorological Society, 2003)
    Large-eddy simulation of open-ocean deep convection shows that the evolution of convection appears in a fundamentally different pattern, depending on the precondition of the ocean and the magnitude of the surface buoyancy ...
  • Toward Large-Eddy Simulations of Dust Devils of Observed Intensity: Effects of Grid Spacing, Background Wind, and Surface Heterogeneities 
    Giersch, S.; Brast, M.; Hoffmann, F.; Raasch, S. (Hoboken, NJ : Blackwell Publishing Ltd, 2019)
    Dust devils are convective vortices with a vertical axis of rotation made visible by lifted soil particles. Currently, there is great uncertainty about the extent to which dust devils contribute to the atmospheric aerosol ...
  • Turbulent Heat Exchange Over Polar Leads Revisited: A Large Eddy Simulation Study 
    Gryschka, M.; Gryanik, V.M.; Lüpkes, C.; Mostafa, Z.; Sühring, M.; Witha, B.; Raasch, S. (Hoboken, NJ : Wiley, 2023)
    Sea ice leads play an important role in energy exchange between the ocean and atmosphere in polar regions, and therefore must be considered in weather and climate models. As sea ice leads are not explicitly resolved in ...