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RISNumerical Experiments Showing the Response of Parameterized Convection to Large-Scale Forcing
Publisher: American Meteorological Society
Abstract: In a series of experiments with a two-dimensional mesoscale numerical model that uses the Frank-Cohen cumulus parameterization, different types of large-scale forcing are held constant and the response of the model atmosphere ...
A Quantitative Investigation of Entrainment and Detrainment in Numerically Simulated Cumulonimbus Clouds
Publisher: American Meteorological Society
Abstract: A method is developed that uses numerical tracers to make accurate diagnoses of entrainment and detrainment rates and of the properties of the entrained and detrained air in numerically simulated clouds. These rates and ...
A Comparison of Cumulus Parameterizations in Idealized Sea-Breeze Simulations
Publisher: American Meteorological Society
Abstract: Four cumulus parameterizations in the fifth-generation Pennsylvania State University?National Center for Atmospheric Research (Penn State?NCAR) Mesoscale Model (MM5) are compared in idealized sea-breeze simulations, with ...
Properties of Tropical Cloud Ensembles Estimated Using a Cloud Model and an Observed Updraft Population
Publisher: American Meteorological Society
Abstract: A simple cloud model is developed which is designed for both diagnostic studies and mesoscale cumulus parameterization experiments. The cloud model is combined with an observed population of tropical convective updrafts ...
Simulation of Tropical Convective Systems. Part I: A Cumulus Parameterization
Publisher: American Meteorological Society
Abstract: A new cumulus parametefization is developed for ffse in mesoscale model simulations of precipitating convective systems. It is designed to estimate convective properties using a cloud model that interacts with the mesoscale ...
Simulation of Tropical Convective Systems. Part II: Simulations of Moving Cloud Lines
Publisher: American Meteorological Society
Abstract: The new cumulns parameterization of Part I of this paper is used in a setes of simulations of tropical mesoscale convective lines. The structures and life cycles of the simulated systems are quite similar to those observed ...
A Numerical Study of Lapse-Rate Adjustments in the Tropical Atmosphere
Publisher: American Meteorological Society
Abstract: Observations in the tropics have shown that the lapse rate of virtual Potential temperature ?v normally resembles that of a reversible moist adiabat. In the present study, a mesoscale numerical model with parameterized ...
The Impact on Simulated Storm Structure and Intensity of Variations in the Mixed Layer and Moist Layer Depths
Publisher: American Meteorological Society
Abstract: The sensitivities of convective storm structure and intensity to variations in the depths of the prestorm mixed layer, represented here by the environmental lifted condensation level (LCL), and moist layer, represented by ...
The Sensitivity of Simulated Convective Storms to Variations in Prescribed Single-Moment Microphysics Parameters that Describe Particle Distributions, Sizes, and Numbers
Publisher: American Meteorological Society
Abstract: The sensitivity of cloud-scale simulations of deep convection to variations in prescribed microphysics parameters is studied, using the single-moment scheme in the Regional Atmospheric Modeling System (RAMS) model. Realistic ...
Further Results on the Sensitivity of Simulated Storm Precipitation Efficiency to Environmental Temperature
Publisher: American Meteorological Society
Abstract: A method is devised for diagnosing the condensation rate in simulations using the Regional Atmospheric Modeling System (RAMS) model, where ice-liquid water potential temperature is a prognostic variable and an iterative ...