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  • A statistical study of the correlation between the surface and surface geostrophic winds in the Wilamette Valley

    Creator:
    Andrews, Leta
    Abstract:
    Relationships among the surface wind, horizontal synoptic-scale pressure gradient and topography are studied in the Willamette Valley in western Oregon. Terrain features alter the standard surface wind-pressure gradient relationship such that the angle between the surface wind and the surface geostrophic wind is most frequently 60°. In winter the surface...
    Resource Type:
    Masters Thesis
    Full Text:
    express my appreciation to Dr. Larry J, Mahrt, my major professor, for suggesting this topic and for his

  • Diurnal fluctuation of meteorological variables above sloping terrain

    Creator:
    Chan, Michael W.
    Abstract:
    Surface meteorological data collected at a mesonetwork in Colorado during the 1973 National Hail Research Experiment were analyzed to see if a diurnal oscillation of boundary layer wind exists and also to determine the mechanism that drives the wind system. The average temperature, pressure, and wind velocity for a month's...
    Resource Type:
    Masters Thesis
    Full Text:
    to thank my major professor, Dr. Larry J. Mahrt for his many helpful suggestions, his professional

  • Penetrative elements at the top of the atmospheric mixed layer

    Creator:
    Paumier, James
    Abstract:
    High resolution data of moisture, temperature and wind velocity collected by aircraft during the 1975 Air Mass Transformation Experiment (ANTEX '75) provide information for detailed investigations of the phenomena occurring at the top of a cloud-topped mixed layer. Joint frequency diagrams of humidity and temperature reveal that for parts of...
    Resource Type:
    Masters Thesis
    Full Text:
    like to express my gratitude to my major professor, Prof. Larry Mahrt, for his patience and support

  • The influence of the diurnal variation of stability on potential evaporation

    Creator:
    Ek, Michael Bryan
    Abstract:
    A method of calculating surface evapotranspiration by separately including the effects of vegetation and atmospheric evaporative demand under the condition of nonlimiting soil moisture is presented. A literature survey is conducted to determine the effects of plants on evapotranspiration. To represent the atmospheric evaporative demand, the original potential evaporation equation...
    Resource Type:
    Masters Thesis
    Full Text:
    all the help Dr. Larry J. Marht gave while I was preparing this thesis. As my major professor, he

  • 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:
    major professor, Dr. Larry Mahrt for his constant guidance, perseverance and constructive criticisms

  • 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:
    . Larry Mahrt for his time, patience, and good-natured guidance throughout my masters program. I am also

  • The influence of stratification on plume structure

    Creator:
    Frick, Walter Eugen
    Abstract:
    In plume theory it is generally assumed that a plume issuing from a round source maintains a round cross section throughout. The consequences of this hypothesis are significant; this fact should motivate research into its validity. This paper investigates conditions and analyzes mechanisms that cause fluid plumes to undergo systematic...
    Resource Type:
    Masters Thesis
    Full Text:
    STRATIFICATION ON PLUME STRUCTURE. ..bstract approved: Larry J. Mahrt In plume theory it is generally assumed

  • 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:
    friend, Larry Mahrt. Without his dedication, patience, understanding, and assistance, this research

  • Sudden changes in local mean values demarcate geophysical regimes

    Creator:
    Howell, James F., 1965-
    Abstract:
    Sudden changes occur where the mean values associated with two adjacent non-overlapping windows of data are anomalously different, and the transition between the window means occurs over a scale that is small relative to the scale of the windows. Positions of sudden changes can be economically retrieved. The sudden change...
    Resource Type:
    Dissertation
    Full Text:
    . Larry Mahrt hired me shortly after I arrived at OSU in the Summer of 1990 and has provided seeds for

  • Turbulent and gravity wave transport in the free atmosphere

    Creator:
    Kim, Jinwon
    Resource Type:
    Dissertation
    Full Text:
    Gravity Wave Transport in the Free Atmosphere Abstract approved: Larry Mahrt Turbulent fluxes and