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Variability of Local Structure Parameters in the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: The propagation of optical and acoustical waves is affected by the atmospheric turbulence through the local instantaneous refractive index structure parameter in a volume of characteristic size r, denoted Cn,r2. Often r ...
A New Subcloud Model for Mass-Flux Convection Schemes: Influence on Triggering, Updraft Properties, and Model Climate
Publisher: American Meteorological Society
Abstract: All convection parameterizations in models of the atmosphere include a decision tree to decide on at least the occurrence, and often the type, of convection in a model grid volume. This decision tree is sometimes referred ...
The Environment of Precipitating Shallow Cumulus Convection
Publisher: American Meteorological Society
Abstract: Quantitative estimates of precipitation in a typical undisturbed trade wind region are derived from 2 months of radar reflectivity data and compared to the meteorological environment determined from soundings, surface flux, ...
A Simple Parameterization for Detrainment in Shallow Cumulus
Publisher: American Meteorological Society
Abstract: For a wide range of shallow cumulus convection cases, large-eddy simulation (LES) model results have been used to investigate lateral mixing as expressed by the fractional entrainment and fractional detrainment rates. It ...
Large-Scale Controls on Extreme Precipitation
Publisher: American Meteorological Society
Abstract: AbstractLarge-eddy simulations with strong lateral forcing representative of precipitation over the Netherlands are performed to investigate the influence of stability, relative humidity (RH), and moisture convergence on ...
Analogies between Mass-Flux and Reynolds-Averaged Equations
Publisher: American Meteorological Society
Abstract: In many large-scale models mass-flux parameterizations are applied to prognose the effect of cumulus cloud convection on the large-scale environment. Key parameters in the mass-flux equations are the lateral entrainment ...
Simple Solutions to Steady-State Cumulus Regimes in the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: modeling framework is developed that extends the mixed-layer model to steady-state cumulus convection. The aim is to consider the simplest model that retains the essential behavior of cumulus-capped layers. The presented ...
A Combined Eddy-Diffusivity Mass-Flux Approach for the Convective Boundary Layer
Publisher: American Meteorological Society
Abstract: A better conceptual understanding and more realistic parameterizations of convective boundary layers in climate and weather prediction models have been major challenges in meteorological research. In particular, parameterizations ...
Momentum Transport in Organized Shallow Cumulus Convection
Publisher: American Meteorological Society
Weather Forecasting Using GPU-Based Large-Eddy Simulations
Publisher: American Meteorological Society
Abstract: ince the advent of computers midway through the twentieth century, computational resources have increased exponentially. It is likely they will continue to do so, especially when accounting for recent trends in multicore ...