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RISThe 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 ...
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 ...
A PDF-Based Formulation of Microphysical Variability in Cumulus Congestus Clouds
Publisher: American Meteorological Society
Abstract: alculating unbiased microphysical process rates over mesoscale model grid volumes necessitates knowledge of the subgrid-scale (SGS) distribution of variables, typically represented as probability distribution functions ...
Simulating the Transition from Drizzling Marine Stratocumulus to Boundary Layer Cumulus with a Mesoscale Model
Publisher: American Meteorological Society
Abstract: A case of coastal California summer season boundary layer cloud has been simulated with the U.S. Navy Coupled Ocean?Atmosphere Mesoscale Prediction System and the results analyzed in the context of consistency with conclusions ...
A PDF-Based Microphysics Parameterization for Shallow Cumulus Clouds
Publisher: American Meteorological Society
Abstract: nbiased calculations of microphysical process rates such as autoconversion and accretion in mesoscale numerical weather prediction models require that subgrid-scale (SGS) variability over the model grid volume be taken ...