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A Cumulus Parameterization Including Mass Fluxes, Vertical Momentum Dynamics, and Mesoscale Effects
Publisher: American Meteorological Society
Abstract: A formulation for parameterizing cumulus convection, which treats cumulus vertical momentum dynamics and mass fluxes consistently, is presented. This approach predicts the penetrative extent of cumulus updrafts on the basis ...
Sensitivity of the Thermal Balance in a General Circulation Model to a Parameterization for Cumulus Convection with Radiatively Interactive Clouds
Publisher: American Meteorological Society
Abstract: The dependence of the thermal balance of a general circulation model on the parameterization of cumulus convection is investigated. Incorporation of a Kuo-type cumulus parameterization into the NCAR community climate model ...
An Initialization for Cumulus Convection in Numerical Weather Prediction Models
Publisher: American Meteorological Society
Abstract: A procedure for initializing parameterizations for cumulus convection in numerical weather prediction models is described. The initialization adjust the temperature and humidity fields such that a simplified version of the ...
A Scheme for Parameterizing Ice-Cloud Water Content in General Circulation Models
Publisher: American Meteorological Society
Abstract: The optical properties of ice clouds are a primary issue for climate and climate change. Evaluating these optical properties in three-dimensional models for studying climate will require a method to calculate the ice water ...
Radiative Forcing of Stationary Planetary Waves
Publisher: American Meteorological Society
Abstract: The stationary wave components of the planetary-scale circulation are maintained by topographic forcing and by latent and sensible heat transfers and radiation. These waves have a potential vorticity balance mainly due to ...
Cumulus Initialization in a Global Model for Numerical Weather Prediction
Publisher: American Meteorological Society
Abstract: A procedure for adjusting temperature and humidity analyses used as initial conditions for numerical weather prediction models so that diagnosed distributions of cumulus convection exist during the initial stages of the ...
The Frequency of Extreme Rain Events in Satellite Rain-Rate Estimates and an Atmospheric General Circulation Model
Publisher: American Meteorological Society
Abstract: The frequency distributions of surface rain rate are evaluated in the Tropical Rainfall Measuring Mission (TRMM) and Special Sensor Microwave/Imager (SSM/I) satellite observations and the NOAA/GFDL global atmosphere model ...
Parameterization of Riming Intensity and Its Impact on Ice Fall Speed Using ARM Data
Publisher: American Meteorological Society
Abstract: Riming within mixed-phase clouds can have a large impact on the prediction of clouds and precipitation within weather and climate models. The increase of ice particle fall speed due to riming has not been considered in ...
Nucleation Processes in Deep Convection Simulated by a Cloud-System-Resolving Model with Double-Moment Bulk Microphysics
Publisher: American Meteorological Society
Abstract: A novel type of limited double-moment scheme for bulk microphysics is presented here for cloud-system-resolving models (CSRMs). It predicts the average size of cloud droplets and crystals, which is important for representing ...
The Significance of Thermodynamic Forcing by Cumulus Convection in a General Circulation Model
Publisher: American Meteorological Society
Abstract: To assess the effects of cumulus convection on the general circulation of the atmosphere, a medium-resolution, spectral general circulation model was integrated twice for 40 simulated days from identical initial conditions, ...