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RISOn the Parameterization of Evaporation of Raindrops as Simulated by a One-Dimensional Rainshaft Model
Publisher: American Meteorological Society
Abstract: The process of evaporation of raindrops below cloud base is investigated by numerical simulations using a one-dimensional rainshaft model with bin microphysics. The simulations reveal a high variability of the shape of the ...
On the Shape–Slope Relation of Drop Size Distributions in Convective Rain
Publisher: American Meteorological Society
Abstract: The relation between the slope and shape parameters of the raindrop size distribution parameterized by a gamma distribution is examined. The comparison of results of a simple rain shaft model with an empirical relation ...
Microphysical Scaling Relations in a Kinematic Model of Isolated Shallow Cumulus Clouds
Publisher: American Meteorological Society
Abstract: The rain formation in shallow cumulus clouds by condensational growth and collision?coalescence of liquid drops is revisited with the aim of understanding the controls on precipitation efficiency for idealized cloud drafts. ...
Evolution of the Shape of the Raindrop Size Distribution in Simulated Shallow Cumulus
Publisher: American Meteorological Society
Abstract: n this paper, the evolution of the raindrop size distribution (RSD) is investigated for two isolated shallow cumulus clouds that are modeled with large-eddy simulations. For a two-moment bulk rain microphysics scheme that ...
Performance of a Triclass Parameterization for the Collision–Coalescence Process in Shallow Clouds
Publisher: American Meteorological Society
Abstract: ocusing on the formation of precipitation in marine stratiform clouds, a two-moment bulk parameterization for three liquid water classes (cloud, drizzle, and rain) is proposed to describe the process of collision?coalescence. ...
Possible Effects of Collisional Breakup on Mixed-Phase Deep Convection Simulated by a Spectral (Bin) Cloud Model
Publisher: American Meteorological Society
Abstract: The effects of the collisional breakup of raindrops are investigated using the Hebrew University Cloud Model (HUCM). The parameterizations, which are combined in the new breakup scheme, are those of Low and List, Beard and ...
Numerical Investigation of Collision-Induced Breakup of Raindrops. Part II: Parameterizations of Coalescence Efficiencies and Fragment Size Distributions
Publisher: American Meteorological Society
Abstract: Results of numerically investigated binary collisions of 32 drop pairs presented in Part I of this study are used to parameterize coalescence efficiencies and size distributions of breakup fragments of large raindrops. In ...
The Signature of Aerosols and Meteorology in Long-Term Cloud Radar Observations of Trade Wind Cumuli
Publisher: American Meteorological Society
Abstract: he signature of aerosols and meteorology on the development of precipitation from shallow cumuli in the trades is investigated with ground-based lidar and radar remote sensing. The measurements are taken from a cloud ...
Operational Convective-Scale Numerical Weather Prediction with the COSMO Model: Description and Sensitivities
Publisher: American Meteorological Society
Abstract: ince April 2007, the numerical weather prediction model, COSMO (Consortium for Small Scale Modelling), has been used operationally in a convection-permitting configuration, named COSMO-DE, at the Deutscher Wetterdienst ...
Spectral (Bin) Microphysics Coupled with a Mesoscale Model (MM5). Part I: Model Description and First Results
Publisher: American Meteorological Society
Abstract: Considerable research investments have been made to improve the accuracy of forecasting precipitation systems in cloud-resolving, mesoscale atmospheric models. Yet, despite a significant improvement in model grid resolution ...