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Filtering by: Has journal Boundary-Layer Meteorology Remove constraint Has journal: Boundary-Layer Meteorology Academic Affiliation Atmospheric Sciences Remove constraint Academic Affiliation: Atmospheric Sciences

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  • Dynamics of a differentially-heated geophysical boundary layer

    Creator:
    Smith, Bartlett Knapp
    Abstract:
    An analytical two-layer model consisting of a time-dependent stratified boundary layer topped by stratified free flow is developed in order to study atmospheric boundary layer production of vertical motion. To avoid use of a constant eddy viscosity, the boundary layer equations are layer-integrated over a fixed depth, and surface stress...
    Resource Type:
    Masters Thesis
    Full Text:
    Differentially-Heated Geophysical Boundary Layer Abstract approved J. Mah An analytical two-layer model

  • Parameterization of shallow convection in the boundary layer

    Creator:
    Chu, Cheng-tsong
    Abstract:
    A shallow convection scheme is derived from several data sets (BOMEX, GATE, AMTEX, BLX83) and developed for the OSU 1-D boundary layer model. Results of the model structure and characteristics of the saturation point (SP) profile are compared against the constant cloud diffusivity scheme of Tiedtke (1983) and the ECMWF...
    Resource Type:
    Masters Thesis
    Full Text:
    Shallow Convection in the Boundary Layer Abstract approved: A shallow convection scheme is derived from

  • An examination of structure and parameterization of turbulence in the stably-stratified atmospheric boundary layer

    Creator:
    Ruscher, Paul Harold
    Abstract:
    The very stable boundary layer is a region of the atmosphere typified by large vertical gradients of temperature and momentum. Analysis of very stable atmospheric flows is complicated by the presence of nonlinear interactions among gravity waves, shear-driven overturning circulations, two-dimensional vortical modes and intermittent turbulence in various stages of...
    Resource Type:
    Dissertation
    Full Text:
    Structure and Parameterization of Turbulence in the Stably- Stratified Atmospheric Boundary Layer Abstract

  • A numerical study of mesoscale motion in the atmospheric mixed layer

    Creator:
    Ruscher, Paul Harold
    Abstract:
    The numerical modeling of motions in the atmosphere's planetary boundary layer (PBL) is a challenging task. In general, the boundary layer interacts with both the overlying atmosphere and the underlying land or water surface in a complex manner. Random turbulence is also present in the PBL which precludes exact prediction...
    Resource Type:
    Masters Thesis
    Full Text:
    of motions in the atmosphere's planetary boundary layer (PBL) is a challenging task. In general

  • Influence of stratification and accelerations on boundary production of vertical motion

    Creator:
    Park, Soon-Ung
    Abstract:
    The influence of boundary layer pumping on an externally-forced synoptic-scale flow is examined. The results follow earlier theories of stratified incompressible Boussinesq flow. These theories state that the spin-down time scale and the penetration depth of the influence of boundary layer pumping are inversely proportional to the stratification and directly...
    Resource Type:
    Dissertation
    Full Text:
    Stratification and Accelerations on Boundary Layer Production of Vertical Motion Abstract approved The

  • Photographic analysis of buoyant stack plumes in a laboratory model of the turbulent mixed layer

    Creator:
    Hukari, Neil F.
    Abstract:
    Four buoyant plumes were produced within a laboratory convectively mixed layer from a source height of about z[subscript s] = 0.15 h, where h is the height of the convectively mixed layer. The projected images of these plumes in the X-Z plane were analyzed using a densitometer (photomultiplier tube) to...
    Resource Type:
    Masters Thesis
    Full Text:
    Buoyant Stack Plumes in a Laboratory Model of the Turbulent Mixed Layer Abstract approved: Four buoyant

  • Turbulent structure in the bora and stable boundary layer

    Creator:
    Frank, Helmut P.
    Abstract:
    An eigenvector analysis of the velocity-temperature correlation matrix is applied to clear-air turbulence measured by aircraft in the Bora. The eigenvectors are identified with the main eddies of the turbulence. This study attempts to infer the three-dimensional structure of these eddies. The results are compared with turbulent structures in the...
    Resource Type:
    Masters Thesis
    Full Text:
    Bora and Stable Boundary Layer Abstract approved: Larry Mahrt An eigenvector analysis of the

  • Numerical simulation of planetary boundary-layer evolution and mesoscale flow over irregular terrain under daytime heating conditions

    Creator:
    Ueyoshi, Kyozo
    Abstract:
    The influence of irregular terrain on the evolution of the daytime planetary boundary layer (PBL) and meso-β scale dry circulations is studied using two three-dimensional hydrostatic σ-coordinate models with different approaches for the PBL parameterizations; the 4-layer model uses the mixed-layer (bulk-layer) approach, while the 7-layer model adopts the eddy-diffusivity...
    Resource Type:
    Dissertation
    Full Text:
    Planetary Boundary-Layer Evolution and Mesoscale Flow over Irregular Terrain under Daytime Heating

  • Turbulence structure within an inclined laboratory convection tank

    Creator:
    Nance, Jon D.
    Abstract:
    A baroclinic, convective mixed-layer was modeled, using water, in a laboratory convection tank identical to that used in the free convection study of Deardorff and Willis (1985). Baroclinicity and mean-flow shearing were achieved by tilting the tank by an angle of 1O⁰. The resulting mechanical-production rate of turbulence kinetic energy...
    Resource Type:
    Masters Thesis
    Full Text:
    boundary layer in a state of free convection (Willis and Deardorff, 1974; Deardorff and Willis, 1985) For

  • Turbulent and gravity wave transport in the free atmosphere

    Creator:
    Kim, Jinwon
    Resource Type:
    Dissertation
    Full Text:
    and the dashed line in (b) is the top of the boundary layer. Slant solid lines denote the aircraft