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RISLarge-Scale Eddies in the Unstably Stratified Atmospheric Surface Layer. Part I: Velocity and Temperature Structure
Publisher: American Meteorological Society
Abstract: Ensemble vertical cross sections are derived for the velocity and temperature fields associated with large-scale eddy (LSE) temperature ramp structures in the turbulent, convective atmospheric surface layer. The turbulent ...
Large-Scale Eddies in the Unstably Stratified Atmospheric Surface Layer. Part II: Turbulent Pressure Fluctuations and the Budgets of Heat Flux, Stress and Turbulent Kinetic Energy
Publisher: American Meteorological Society
Abstract: A method is developed for retrieving turbulent pressure fluctuations from tower measurements of velocity and temperature, through use of the equations of motion. This method is applied to a series of large-scale eddies ...
The Three-Dimensional Structure of Convection in the Atmospheric Surface Layer
Publisher: American Meteorological Society
Abstract: During April 1978, a field experiment was undertaken at the Boulder Atmospheric Observatory (BAO), near Boulder, Colorado, to investigate convective plumes in the atmospheric surface layer. The plume translational velocities ...
Observations and Mixed-Layer Modeling of a Terrain-Induced Mesoscale Gyre: The Denver Cyclone
Publisher: American Meteorological Society
Abstract: In northeastern Colorado a frequently observed feature of the surface wind field is a stationary, terrain-induced mesoscale gyre, which is often associated with the formation of severe weather. Because of the gyre's proximity ...
Observations and Mixed-Layer Modeling of a Terrain-Induced Mesoscale Gyre: The Denver Cyclone
Publisher: American Meteorological Society
Abstract: In northeastern Colorado a frequently observed feature of the surface wind field is a stationary, terrain-induced mesoscale gyre, which is often associated with the formation of severe weather. Because of the gyre/s proximity ...
Thermally Indirect Motions in the Convective Atmospheric Boundary Layer
Publisher: American Meteorological Society
Abstract: The energetics of the dry convective boundary layer is studied by partitioning the turbulent heat flux into thermally indirect (w???<0) and thermally direct (w???>0) components as a function of z/Zi. It is found that except ...
Case Study of an Orographically Induced Mesoscale Vortex (Denver Cyclone)
Publisher: American Meteorological Society
Abstract: Observations taken during the Convection Initiation and Downburst Experiment (CINDE) are used to describe the formation and structure of an orographically induced mesoscale vortex that frequently occurs in northeastern ...
Sensitivity of Numerical Simulations to Parameterizations of Roughness for Surface Heat Fluxes at High Winds over the Sea
Publisher: American Meteorological Society
Abstract: A few roughness length schemes for surface sensible and latent heat fluxes have been developed to fit observations under low and moderate wind (<20 m s?1) conditions. It is not clear to what degree these schemes can be ...
Observations and Numerical Model Simulations of the Atmospheric Boundary Layer in the Santa Barbara Coastal Region
Publisher: American Meteorological Society
Abstract: Observations of boundary-layer flow within the Santa Barbara region taken on 20 September 1985 revel the presence of a wide variety of flow features, including mesoscale wind vortices sea/land breezes, and thermally driven ...