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RISOn a Simple, Parameter-Free Partition between Moistening and Precipitation in the Kuo Scheme
Publisher: American Meteorological Society
Abstract: This note presents a reformulation of the thermodynamic equations of the Kuo scheme in which the partition between moistening and precipitation is determined locally through use of the wet-bulb characteristics.
A Comprehensive Radiation Scheme for Numerical Weather Prediction Models with Potential Applications in Climate Simulations
Publisher: American Meteorological Society
Abstract: A comprehensive scheme for the parameterization of radiative transfer in numerical weather Prediction (NWP) models has been developed. The scheme is based on the solution of the δ-two-stream version of the radiative transfer ...
Mesoscale Background Error Covariances: Recent Results Obtained with the Limited-Area Model ALADIN over Morocco
Publisher: American Meteorological Society
Abstract: This note presents recent results on the properties of background error covariances computed using the National Meteorological Center (now known as the National Centers for Environmental Prediction) method and applied to ...
Integration of the Fully Elastic Equations Cast in the Hydrostatic Pressure Terrain-Following Coordinate in the Framework of the ARPEGE/Aladin NWP System
Publisher: American Meteorological Society
Abstract: ARPEGE/Aladin is a limited-area 3D primitive equation model, which belongs to the integrated NWP ARPEGE/IFS system. Like its global counterpart, the limited-area version has a spectral representation of variables in the ...
Simplified and Regular Physical Parameterizations for Incremental Four-Dimensional Variational Assimilation
Publisher: American Meteorological Society
Abstract: A set of physical parameterizations has been developed for inclusion in incremental four-dimensional variational assimilation (4D-Var). The goal for this physical package is that it be simple, regular (for the efficiency ...
A Compact Model for the Stability Dependency of TKE Production–Destruction–Conversion Terms Valid for the Whole Range of Richardson Numbers
Publisher: American Meteorological Society
Abstract: ecently, observational and numerical evidence has accumulated against the concept of a critical Richardson number Ricr beyond which too-stable stratification would extinguish turbulence. It also appeared that the characteristics ...
Cloud and Precipitation Parameterization in a Meso-Gamma-Scale Operational Weather Prediction Model
Publisher: American Meteorological Society
Abstract: The paper assesses the difficulties of running an operational NWP model in the resolution range of 3?8 km. In this case, deep convection cells are neither much smaller than the grid box as assumed by most parameterization ...
Multiscale Performance of the ALARO-0 Model for Simulating Extreme Summer Precipitation Climatology in Belgium
Publisher: American Meteorological Society
Abstract: aily summer precipitation over Belgium from the Aire Limitée Adaptation Dynamique Développement International (ALADIN) model and a version of the model that has been updated with physical parameterizations, the so-called ...
A New Method for Generating Initial Condition Perturbations in a Regional Ensemble Prediction System: Blending
Publisher: American Meteorological Society
Abstract: blending method for generating initial condition (IC) perturbations in a regional ensemble prediction system is proposed. The blending is to combine the large-scale IC perturbations from a global ensemble prediction system ...
An Approach for Convective Parameterization with Memory: Separating Microphysics and Transport in Grid-Scale Equations
Publisher: American Meteorological Society
Abstract: An approach for convective parameterization is presented here, in which grid-scale budget equations of parameterization use separate microphysics and transport terms. This separation is used both as a way to introduce into ...