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Numerical Simulation of Tropical Cumulus Clouds and Their Interaction with the Subcloud Layer
Publisher: American Meteorological Society
Abstract: A two-dimensional numerical model suitable for simulating an ensemble of cumulus clouds has been developed. It differs from similar models in its greater emphasis on turbulent processes in the boundary layer and in clouds. ...
Linear Eddy Modeling of Entrainment and Mixing in Stratus Clouds
Publisher: American Meteorological Society
Abstract: Mixing of entrained air in stratus clouds is an important but poorly understood process. It is a crucial ingredient of cloud-top entrainment instability (CEI). CEI has been proposed as a breakup mechanism for stratus clouds. ...
Cloud Properties Simulated by a Single-Column Model. Part I: Comparison to Cloud Radar Observations of Cirrus Clouds
Publisher: American Meteorological Society
Abstract: This study describes and demonstrates a new method for identifying deficiencies in how cloud processes are represented in large-scale models. Kilometer-scale-resolving cloud radar observations and cloud-resolving model ...
Evaluation of Cloudiness Parameterizations Using a Cumulus Ensemble Model
Publisher: American Meteorological Society
Abstract: Diagnostic cloudiness parameterizations in large-scale models are evaluated by using a two-dimensional numerical cumulus ensemble model. The model covers a large horizontal domain (512 km) but resolves individual clouds. ...
The Macroscopic Behavior of Cumulus Ensembles Simulated by a Cumulus Ensemble Model
Publisher: American Meteorological Society
Abstract: The two-dimensional UCLA cumulus ensemble model (CEM), which covers a large horizontal area with a sufficiently small horizontal grid size, is used in this study. A number of simulation experiments are performed with the ...
Numerical Simulation of the Stratus-to-Cumulus Transition in the Subtropical Marine Boundary Layer. Part II: Boundary-Layer Circulation
Publisher: American Meteorological Society
Abstract: The progression from the stratus-topped boundary layer (STBL) to the trade cumulus boundary layer (TCBL) during a simulated stratus-to-cumulus transition (SCT) involves two intermediate stages: the deep stratus-topped ...
Numerical Simulation of the Stratus-to-Cumulus Transition in the Subtropical Marine Boundary Layer. Part I: Boundary-Layer Structure
Publisher: American Meteorological Society
Abstract: A stratus-to-cumulus transition (SCT) that resembles observations occurred in Lagrangian numerical simulations of the subtropical marine boundary layer over the northeastern Pacific Ocean southwest of California. The ...
Interactions of Radiation and Convection in Simulated Tropical Cloud Clusters
Publisher: American Meteorological Society
Abstract: A two-dimensional cumulus ensemble model is used to study the interactions of radiation and convection in tropical squall cloud clusters. The model includes cloud-scale and mesoscale dynamics, an improved bulk ice microphysics ...
Modeling Entrainment and Finescale Mixing in Cumulus Clouds
Publisher: American Meteorological Society
Abstract: A model used to study entrainment and mixing of thermodynamic properties in the stratus-topped boundary layer has been extended to represent these processes in cumulus clouds. The new model, called the ?explicit mixing ...