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RISA Cumulus Cloud Microphysics Parameterization for Cloud-Resolving Models
Publisher: American Meteorological Society
Abstract: microphysical parameterization for shallow cumulus and boundary layer stratocumulus clouds has been developed. Similar to the Khairoutdinov and Kogan parameterization for stratocumulus clouds, the new parameterization is ...
Using a Variability Factor to Account for Cloud Microphysical Inhomogeneity in Mesoscale Models
Publisher: American Meteorological Society
Abstract: AbstractDifferent formulations of the joint probability distribution function (JPDF) based on large-eddy simulation (LES) studies of shallow cumulus and cumulus congestus clouds were evaluated. It was shown that inhomogeneity ...
The Simulation of a Convective Cloud in a 3-D Model With Explicit Microphysics. Part I: Model Description and Sensitivity Experiments
Publisher: American Meteorological Society
Abstract: A three-dimensional nonhydrostatic anelastic numerical model of a convective cloud with an explicit description of microphysical processes has been developed. Two distribution functions are considered in the model?one for ...
Drop Size Separation in Numerically Simulated Convective Clouds and Its Effect on Warm Rain Formation
Publisher: American Meteorological Society
Abstract: It is shown that, as a result of the flow diffluence at the upper levels of the cloud, droplets of different sizes move along different trajectories. The small droplets with negligible fall velocities will have higher ...
Large-Eddy Simulation of Air Parcels in Stratocumulus Clouds: Time Scales and Spatial Variability
Publisher: American Meteorological Society
Abstract: Large ensembles of air parcel trajectories driven by the (large-eddy simulation) LES-generated velocity fields from simulations of stratocumulus clouds were analyzed, focusing on statistics of air parcel in-cloud time ...
A New Cloud Physics Parameterization in a Large-Eddy Simulation Model of Marine Stratocumulus
Publisher: American Meteorological Society
Abstract: A new bulk microphysical parameterization for large-eddy simulation (LES) models of the stratocumulus-topped boundary layer has been developed using an explicit (drop spectrum resolving) microphysical model as a data source ...
The Simulation of a Convective Cloud in a 3D Model with Explicit Microphysics. Part II: Dynamical and Microphysical Aspects of Cloud Merger
Publisher: American Meteorological Society
Abstract: The development and merger of pairs of convective clouds in a shear-free environment were simulated in an explicit microphysical cloud model. The occurrence or nonoccurrence of updraft merger and the timing of merger ...
An Investigation of Ice Production Mechanisms in Small Cumuliform Clouds Using a 3D Model with Explicit Microphysics. Part I: Model Description
Publisher: American Meteorological Society
Abstract: A new cloud model that combines a three-dimensional nonhydrostatic dynamical framework with explicit liquid- and ice-phase microphysics and a detailed treatment of ice nucleation and multiplication processes is presented. ...
Parameterization of Cloud Microphysics Based on Full Integral Moments
Publisher: American Meteorological Society
Abstract: his paper describes a microphysics parameterization based on integral moments of the full drop size distributions (DSDs) as opposed to a partial moments approach (sometimes referred to as Kessler-type parameterization) ...
Parameterization of Bulk Condensation in Numerical Cloud Models
Publisher: American Meteorological Society
Abstract: The accuracy of the moist saturation adjustment scheme has been evaluated using a three-dimensional explicit microphysical cloud model. It was found that the error in saturation adjustment depends strongly on the CCN ...