Abstract
A three-dimensional, non-hydrostatic mesoscale model is used to study boundary-layer structure over an area characterized by the city of Copenhagen, the Øresund strait, and adjacent coastal farmland. Simulations are compared with data obtained on June 5, 1984 during the Øresund experiment.
Under moderately strong wind conditions, a stable internal boundary layer (IBL) developed over the Øresund strait during the day. Near-surface winds decelerate over water due to diminished vertical momentum transfer.
The turbulent kinetic energy field closely reflects the surface roughness distribution due to the imposed relatively strong wind forcing. TKE budgets over water, farmland and a city area are discussed by inspection of vertical profiles of the individual terms. The buoyancy term is used to indicate IBL heights because it changes sign at the boundary between different stability regimes. Measured and simulated dissipation rates show a decrease in the transition zone as the air travels over water and an abrupt increase when the IBL over a downwind city area is intersected. The top of the stable IBL is characterized by a minimum in the vertical TKE profile.
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References
Anderson, D. A., Tannehill, J. C. and Pletcher, R. H.: 1984, Computational Fluid Mechanics and Heat Transfer, McGraw-Hill, New York, 599 pp.
Arakawa, A. and Lamb, V. R.: 1977, ‘Computational Design of the Basic Dynamical Processes of the UCLA General Circulation Model’, Meth. Comp. Phys. 17, 174–264.
Arritt, R. W.: 1987, ‘The Effect of Water Surface Temperature on Lake Breezes and Thermal Internal Boundary Layers’, Boundary-Layer Meteorol. 40, 101–125.
Arritt, R. W. and Physick, W. L.: 1989, ‘Formulation of the Thermal Internal Boundary Layer in a Mesoscale Model. II. Simulations with a level - 2.5 Turbulence Closure’, Boundary-Layer Meteorol. 49, 411–416.
Blackadar, A. K.: 1962, ‘The Vertical Distribution of Wind and Turbulent Exchange in a Neutral Atmosphere’, J. Geophys. Res. 67, 3095–3102.
Bougeault, P. and Lacarrere, P.: 1989, ‘Parameterization of Orography-Induced Turbulence in a Mesobeta Scale Model’, Mon. Weather Rev. 117, 1870–1888.
Businger, J. A.: 1973, ‘Turbulent Transfer in the Atmospheric Surface Layer’, Workshop in Micrometeorology, Chapter 2, Am. Meteorol. Society, Boston, Mass., USA.
Businger, J. A., Wyngaard, J. C., Izumi, Y. and Bradley, E. F.: 1971, ‘Flux-Profile Relationships in the Atmospheric Surface Layer’, J. Atmos. Sci. 28, 181–189.
Charnock, H.: 1955, ‘Wind Stress on a Water Surface’, Quart. J. Roy. Meteorol. Soc. 81, 639–640.
Claussen, M.: 1988, ‘On the Surface Energy Budget of Coastal Zones with Tidal Flats’, Beitr. Phys. Atmosph. 61, 39–49.
Deardorff, J. W.: 1978, ‘Efficient Prediction of Ground Surface Temperature and Moisture with Inclusion of a Layer of Vegetation’, J. Geophys. Res. 83, 1889–1903.
Doran, J. C. and Gryning, S.-E.: 1987, ‘Wind and Temperature Structure over a Land-Water-Land Area’, J. Cl. Appl. Meteorol. 28, 973–979.
Doran, J. C.: 1988, Contribution to a EURASAP Conference on Meteorology and Atmospheric Dispersion in a Coastal Area, Proceedings available from Risø National Laboratory, Roskilde, Denmark.
Gryning, S.-E.: 1985, ‘The ØRESUND Experiment - A Nordic Mesoscale Dispersion Experiment over a Land-Water-Land Area’, Bull. American Meteorological Society 66, 1403–1407.
Kapitza, H.: 1987, ‘Das Dynamische Gerüst Eines Nicht-Hydrostatischen MesoskalenModells der Atmosphärischen Zirkulation’, GKSS 87/E/35, available from Research Centre Geesthacht, 2054 Geesthacht, F.R.G.
Kapitza, H. and Eppel, D.: 1987, ‘A 3-D Poisson Solver Based on Conjugate Gradients Compared to Standard Iterative Methods and its Performance on Vector Computers’, J. Comp. Phys. 68, 474–484.
Kasten, F. and Czeplak, G.: 1980, ‘Solar and Terrestrial Radiation Dependent on the Amount and Type of Clouds’, Solar Energy 24, 177–189.
Louis, J. F.: 1979, ‘A Parametric Model of Vertical Eddy Fluxes in the Atmosphere’, Boundary-Layer Meteorol. 17, 187–202.
Melas, D.: 1987, ‘Geostrophic Wind in the Øresund Area Determined by Objective Analysis of the Pressure Field’, The Øresund Experiment — Proceedings from workshop II, available from Risø National Laboratory.
Mellor, G. L. and Yamada, T.: 1974, ‘A Hierarchy of Turbulence Closure Models for Planetary Boundary Layers’, J. Atm. Sci. 31, 1791–1806.
Mortensen N. G. and Gryning, S.-E.: 1989, ‘The Øresund Experiment - Databank Report’, NORD-FORSK — available from Risø National Laboratory.
Mulhearn, P. J.: 1981, ‘On the Formation of a Stably Stratified Internal Boundary Layer by Advection of Warm Air over a Cooler Sea’, Boundary-Layer Meteorol. 21, 247–254.
Novak, M. D. and Black, T. A.: 1985, ‘Theoretical Determination of the Surface Energy Balance and Thermal Regimes of Bare Soils’, Boundary-Layer Meteorol. 33, 313–333.
O'Brien, J. J.: 1970, ‘A Note on the Vertical Structure of the Eddy Exchange Coefficient in the Planetary Boundary Layer’, J. Atmos. Sci. 27, 1213–1215
Pielke, R. A.: 1984, Mesoscale Meteorological Modeling, Academic Press, 612 pp.
Richtmyer, R. D. and Morton, K. W.: 1967, Difference Methods for Initial-Value Problems, Interscience Publishers, 406 pp.
Smolarkiewicz, P. K.: 1984, ‘A Fully Multidimensional Positive Definite Advection Transport Algorithm with Small Implicit Diffusion’, J. Comp. Phys. 54, 325–362.
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Mengelkamp, H.T. Boundary layer structure over an inhomogeneous surface: Simulation with a non-hydrostatic mesoscale model. Boundary-Layer Meteorol 57, 323–341 (1991). https://doi.org/10.1007/BF00120052
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DOI: https://doi.org/10.1007/BF00120052