Search
CSV
RISLinking Nonlinearity and Non-Gaussianity of Planetary Wave Behavior by the Fokker–Planck Equation
Publisher: American Meteorological Society
Abstract: To link prominent nonlinearities in the dynamics of 500-hPa geopotential heights to non-Gaussian features in their probability density, a nonlinear stochastic model of atmospheric planetary wave behavior is developed. An ...
Linear and Nonlinear Signatures in the Planetary Wave Dynamics of an AGCM: Phase Space Tendencies
Publisher: American Meteorological Society
Abstract: To identify and quantify indications of linear and nonlinear planetary wave behavior, characteristics of a very long integration of an atmospheric general circulation model in a four-dimensional phase space are examined. ...
Linear and Nonlinear Signatures in the Planetary Wave Dynamics of an AGCM: Probability Density Functions
Publisher: American Meteorological Society
Abstract: To identify and quantify indications of linear and nonlinear planetary wave behavior and their impact on the distribution of atmospheric states, characteristics of a very long integration of an atmospheric general circulation ...
A Comparison of Model Error Representations in Mesoscale Ensemble Data Assimilation
Publisher: American Meteorological Society
Abstract: esoscale forecasts are strongly influenced by physical processes that are either poorly resolved or must be parameterized in numerical models. In part because of errors in these parameterizations, mesoscale ensemble data ...
Diagnosing Model Errors from Time-Averaged Tendencies in the Weather Research and Forecasting (WRF) Model
Publisher: American Meteorological Society
Abstract: ccurate predictions in numerical weather models depend on the ability to accurately represent physical processes across a wide range of scales. This paper evaluates the utility of model time tendencies, averaged over many ...
On the Dynamical Mechanisms Governing El Niño–Southern Oscillation Irregularity
Publisher: American Meteorological Society
Abstract: AbstractThis study investigates the mechanisms by which short time-scale perturbations to atmospheric processes can affect El Niño?Southern Oscillation (ENSO) in climate models. To this end a control simulation of NCAR?s ...
Classification of Warm-Season Precipitation in High-Resolution Rapid Refresh (HRRR) Model Forecasts over the Contiguous United States
Publisher: American Meteorological Society
Impact of a Stochastic Kinetic Energy Backscatter Scheme on Warm Season Convection-Allowing Ensemble Forecasts
Publisher: American Meteorological Society
Abstract: he efficacy of a stochastic kinetic energy backscatter (SKEB) scheme to improve convection-allowing probabilistic forecasts was studied. While SKEB has been explored for coarse, convection-parameterizing models, studies ...
Stochastic Parameterization and El Niño–Southern Oscillation
Publisher: American Meteorological Society
Abstract: l Niño?Southern Oscillation (ENSO) is the dominant mode of interannual variability in the tropical Pacific. However, the models in the ensemble from phase 5 of the Coupled Model Intercomparison Project (CMIP5) have large ...
Temperature Extremes in the Community Atmosphere Model with Stochastic Parameterizations
Publisher: American Meteorological Society
Abstract: his paper evaluates the performance of the NCAR Community Atmosphere Model, version 4 (CAM4), in simulating observed annual extremes of near-surface temperature and provides the first assessment of the impact of stochastic ...