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  • 1
    Electronic Resource
    Electronic Resource
    The temperature profile and heat transfer law in a neutrally and stably stratified planetary boundary layer (1989)
    Springer
    Boundary layer meteorology 49 (1989), S. 1-5 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A logarithmic + polynomial approximation is proposed for the vertical temperature profile in a neutrally or stably stratified planetary boundary layer (PBL) in conditions of quasi-stationarity. Using this approximation with the asymptotic logarithmic + linear law of the Monin-Obukhov similarity theory for the near-surface layer and with the Zilitinkevich formula for the PBL thickness allows one to derive an analytical expression for the function C in the heat transfer law, which permits simple parameterization of the thermal interaction between the atmosphere and the underlying medium in terms of external parameters, such as the geostrophic wind velocity and the temperature difference across the PBL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00116402
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  • 2
    Electronic Resource
    Electronic Resource
    Similarity theory and resistance laws for the planetary boundary layer (1974)
    Springer
    Boundary layer meteorology 7 (1974), S. 391-397 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Methods are developed for the determination of parameters of the atmospheric planetary boundary layer, within the framework of similarity theory based on the external parameters — wind velocity at the upper boundary of the layer, its thickness, air temperature difference between the upper and the lower boundaries, roughness of the underlying surface, and buoyancy forces. The form of the resistance laws is discussed. Determination of the thickness of the stationary and horizontally homogeneous (Ekman) boundary layer is analyzed and generalizations of the latter are suggested for non-stationary and inhomogeneous boundary layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00240840
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  • 3
    Electronic Resource
    Electronic Resource
    On the determination of the height of the Ekman boundary layer (1972)
    Springer
    Boundary layer meteorology 3 (1972), S. 141-145 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The heighth τ of the Ekman turbulent boundary layer determined by the momentum flux profile is estimated with the aid of considerations of similarity and an analysis of the dynamic equations. Asymptotic formulae have been obtained showing that, with increasing instability,h τ increases as ¦μ¦1/2 (where μ is the non-dimensional stratification parameter); with increasing stability, on the other hand,h decreases as μ−1/2. For comparison, a simple estimate of the boundary-layer heighth u determined by the velocity profile is given. As is shown, in unstable stratification,h u behaves asymptotically as ¦μ¦−1, i.e., in a manner entirely different from that ofh τ.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02033914
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  • 4
    Electronic Resource
    Electronic Resource
    On evaluation of the oceanic surface drift current speed and direction (1978)
    Springer
    Boundary layer meteorology 14 (1978), S. 29-33 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The surface drift current speed and direction are defined using the resistance laws for turbulent Ekman boundary layers. Stratification conditions that coincide in the atmospheric and oceanic boundary layers yield approximate formulas whereby the drift current and geostrophic wind directions coincide and the geostrophic wind factor k is equal to the square root of the air and water density ratio. The theoretical estimates of k are compared with available experimental data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123987
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  • 5
    Electronic Resource
    Electronic Resource
    Velocity profiles, the resistance law and the dissipation rate of mean flow kinetic energy in a neutrally and stably stratified planetary boundary layer (1989)
    Springer
    Boundary layer meteorology 46 (1989), S. 367-387 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The logarithmic + polynomial approximation is suggested for vertical profiles of velocity components in a planetary boundary layer (PBL) at neutral and stable stratification. The resistance law functions A and B are determined on the basis of this approximation, using integral relations derived from the momentum equations, the Monin-Obukhov asymptotic formula for the wind profile in a stably stratified near-surface layer and the known expressions for the PBL depth. This result gives a realistic and convenient method for calculating the surface friction velocity and direction and the total dissipation rate of mean flow kinetic energy in terms of geostrophic velocity, buoyancy flux at the surface, the roughness parameter and the Coriolis parameter. In the course of these derivations a review is given of current views on the main problems of the neutral and stable PBL.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00172242
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  • 6
    Electronic Resource
    Electronic Resource
    A mathematical model of microclimate (1990)
    Springer
    Boundary layer meteorology 52 (1990), S. 199-202 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract Climatologists will be interested in a mathematical model of microclimate which is bieng developed by the fluid-mechanics group at the Institute of Limnology (Leningrad). The model is designed for two main types of application: microclimatic simulations; and microclimatic interpretations of large-scale weather forecasts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00123185
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  • 7
    Electronic Resource
    Electronic Resource
    Resistance law, effective roughness length, and deviation angle over hilly terrain (1991)
    Springer
    Boundary layer meteorology 55 (1991), S. 191-198 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract In this note, we derive from the resistance law of Rossby number similarity theory the expressions for the drag coefficient and the deviation angle for strongly unstable and strongly stable stratifications. The extension of the applicability of the resistance laws to inhomogeneous terrain is discussed. A determination of the deviation angle over inhomogeneous terrain from a numerical experiment is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00119334
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  • 8
    Electronic Resource
    Electronic Resource
    Shear convection (1973)
    Springer
    Boundary layer meteorology 3 (1973), S. 416-423 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The paper discusses convection in the presence of wind shear, a condition analysed previously by Zilitinkevich (1971). This region (between the forced and fully developed convective layers) was also considered by Betchov and Yaglom (1971). In the present paper the author endeavors to develop a consistent analysis from the basic hypothesis of a very weak interaction between the vertical convective motions and mechanical turbulence, employing a new similarity model of the turbulent regime. Additional experimental data are introduced. Unlike the notation used in the references quoted above, this regime is termed ‘shear convection’ rather than ‘free convection’. The latter is traditionally regarded as synonymous with the terms ‘pure’ or ‘fully developed convection’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01034985
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  • 9
    Electronic Resource
    Electronic Resource
    Numerical model of a non-steady atmospheric planetary boundary layer, based on similarity theory (1992)
    Springer
    Boundary layer meteorology 59 (1992), S. 387-411 
    Details
    ISSN: 1573-1472
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract A numerical model of a non-stationary atmospheric planetary boundary layer (PEL) over a horizontally homogeneous flat surface is derived on the basis of similarity theory. The two most typical turbulence regimes are reproduced: one corresponding to a convectively growing PBL and another corresponding to a stably stratified quasi-equilibrium PBL. The PBL is treated as a unit. Hence, its evolution is characterized by temporal changes of intrinsic parameters, such as the PBL depth, the vertically averaged values of potential temperature, specific humidity and components of wind velocity, the near-surface values of heat, water vapor and momentum fluxes. The internal structure of the PBL is considered self-similar. This allows one to represent the interaction between the air flow and the underlying surface by means of universal heat/mass transfer and resistance laws. Numerical experiments on the diurnal variations of meteorological fields in the lower 2 km layer confirm the ability of the model to reproduce the main features of the phenomena, known from observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02215460
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  • 10
    Electronic Resource
    Electronic Resource
    SURFACE-LAYER SCALING FOR THE CONVECTION-INDUCED STRESS REGIME (1997)
    Springer
    Boundary layer meteorology 83 (1997), S. 423-439 
    Details
    ISSN: 1573-1472
    Keywords: Surface layer ; Free convection ; Roughness length
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The Prandtl, Obukhov, and Monin andObukhov similarity theories are widely used todescribe the structure of turbulence in theatmospheric surface layer. Currently it isunderstood that in strong convection with no or veryweak mean wind the traditional theory breaks down.In particular, the traditional theory implies asingle-valued correspondence between localturbulence statistics and local properties ofthe flow. In very strong convection, this is nottrue because of large-scale (∼ 10 3 m) coherentstructures, embracing the entire convective boundarylayer (CBL). These structures produce random guststhat crucially affect surface-layer turbulence andmake it dependent on global properties of theflow, such as the CBL depth. In the present paperthe limits of validity of the traditional surface-layer similarity theory are determined and a revisedtheory of fair weather convection in the surface layeris developed by considering the effect of gustiness. It is shownthat the theoretical predictions are consistent withfield data from the TOGA COARE and SCOPEexperiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1000281625985
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