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RISOrganization and Representation of Boundary Layer Clouds
Publisher: American Meteorological Society
Abstract: This study is intended to summarize and to simplify the complicated processes in boundary layer cloud regimes using a single parameter, Q1, the normalized saturation deficit. With the aid of large eddy simulation (LES) ...
A Simple Cloud Parameterization Derived from Cloud Resolving Model Data: Diagnostic and Prognostic Applications
Publisher: American Meteorological Society
Abstract: A simple statistical parameterization of cloud water?related variables that has been originally developed for nonprecipitating boundary layer clouds is extended for all cloud types including deep precipitating convection. ...
Large-Scale Distinctions between MJO and Non-MJO Convective Initiation over the Tropical Indian Ocean
Publisher: American Meteorological Society
Abstract: n this study, the authors seek large-scale signals that may distinguish MJO from non-MJO convective events before they start over the Indian Ocean. Three such signals were found. Low-level easterly anomalies extend from ...
A Model of Marine Boundary-Layer Cloudiness for Mesoscale Applications
Publisher: American Meteorological Society
Abstract: A one-dimensional version of a multilevel mesoscale model is used to represent the cloud-topped boundary layer (CTBL). Turbulent exchanges are parameterized with a prognostic equation for the turbulent kinetic energy and ...
The Use of Partial Cloudiness in a Warm-Rain Parameterization: A Subgrid-Scale Precipitation Scheme
Publisher: American Meteorological Society
Abstract: A method is proposed on how to handle the effects of partial cloudiness in a warm-rain microphysical scheme and how to generate subgrid-scale precipitation. The method is simple and concerns essentially two ideas: the use ...
A Numerical Investigation of the Influence of Large-Scale Winds on Sea-Breeze- and Inland-Breeze-type Circulations
Publisher: American Meteorological Society
Abstract: A two-dimensional mesoscale model is used to study the influence of large-scale background winds on sea-breeze- and inland- (vegetation) breeze-type circulations. It is found that the intensity (vertical velocity) of the ...
Energy Spectra and Inertia–Gravity Waves in Global Analyses
Publisher: American Meteorological Society
Abstract: AbstractSeveral decades after E. Dewan predicted that the shallowing of the atmospheric energy spectrum in mesoscale is produced by the inertia?gravity (IG) waves, global analyses have reached the resolution at which the ...
Convectively Coupled Kelvin Waves: From Linear Theory to Global Models
Publisher: American Meteorological Society
Abstract: he authors analyze composite structures of tropical convectively coupled Kelvin waves (CCKWs) in terms of the theory of Raymond and Fuchs using radiosonde data, 3D analysis and reanalysis model output, and annual integrations ...
Improved Middle Atmosphere Climate and Forecasts in the ECMWF Model through a Nonorographic Gravity Wave Drag Parameterization
Publisher: American Meteorological Society
Abstract: In model cycle 35r3 (Cy35r3) of the ECMWF Integrated Forecast System (IFS), the momentum deposition from small-scale nonorographic gravity waves is parameterized by the Scinocca scheme, which uses hydrostatic nonrotational ...
Wavelet-Compressed Representation of Deep Moist Convection
Publisher: American Meteorological Society
Abstract: The capacity of wavelets to effectively represent atmospheric processes under compression is tested by a dataset generated by a cloud-resolving model simulation of deep convective events observed during the Tropical Ocean ...