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RISA Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: A Pilot Study
Publisher: American Meteorological Society
Abstract: AbstractThe model gray zone refers to the range of grid spacings comparable to the dominant length scale of the flow. In the gray zone, the flow is partially resolved and partially subgrid scale (SGS). Neither ensemble-a ...
A Physically Based Horizontal Subgrid-Scale Turbulent Mixing Parameterization for the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: AbstractCompared to the representation of vertical turbulent mixing through various planetary boundary layer (PBL) schemes, the treatment of horizontal turbulent mixing in the boundary layer has received much less attention. ...
Improved Length Scales for Turbulence Kinetic Energy–Based Planetary Boundary Layer Scheme for the Convective Atmospheric Boundary Layer
Publisher: American Meteorological Society
Abstract: Based on a priori analysis of large-eddy simulations (LESs) of the convective atmospheric boundary layer, improved turbulent mixing and dissipation length scales are proposed for a turbulence kinetic energy (TKE)-based ...
A Grid-Refinement-Based Approach for Modeling the Convective Boundary Layer in the Gray Zone: Algorithm Implementation and Testing
Publisher: American Meteorological Society
Abstract: AbstractA grid-refinement-based method is implemented in a community atmospheric model to improve the representation of convective boundary layer (CBL) turbulence on gray-zone [i.e., ~O(1) km] grids. At this resolution, ...
Climatology of Significant Tornadoes within China and Comparison of Tornado Environments between the United States and China
Publisher: American Meteorological Society
Climatology of Significant Tornadoes within China and Comparison of Tornado Environments between the United States and China
Publisher: American Meteorological Society
The Universality of the Normalized Vertical Velocity Variance in Contrast to the Horizontal Velocity Variance in the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: AbstractThe vertical turbulent velocity variance normalized by the convective velocity squared as a function of the boundary layer depth?normalized height [i.e., ] in the convective boundary layer (CBL) over a homogeneous ...
Scale-Similarity Subgrid-Scale Turbulence Closure for Supercell Simulations at Kilometer-Scale Resolutions: Comparison against a Large-Eddy Simulation
Publisher: American Meteorological Society
Reexamining the Gradient and Countergradient Representation of the Local and Nonlocal Heat Fluxes in the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: AbstractTurbulent mixing in the daytime convective boundary layer (CBL) is carried out by organized nonlocal updrafts and smaller local eddies. In the upper mixed layer of the CBL, heat fluxes associated with nonlocal ...
Explicit Prediction of Hail in a Long-Lasting Multicellular Convective System in Eastern China Using Multimoment Microphysics Schemes
Publisher: American Meteorological Society
Abstract: AbstractDuring the afternoon of 28 April 2015, a multicellular convective system swept southward through much of Jiangsu Province, China, over about 7 h, producing egg-sized hailstones on the ground. The hailstorm event ...