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RISA Statistical Analysis of the Dependency of Closure Assumptions in Cumulus Parameterization on the Horizontal Resolution
Publisher: American Meteorological Society
Abstract: Simulated data from the UCLA cumulus ensemble model are used to investigate the quasi-universal validity of closure assumptions used in existing cumulus parameterizations. A closure assumption is quasi-universally valid ...
Partitioning Mass, Heat, and Moisture Budgets of Explicitly Simulated Cumulus Ensembles into Convective and Stratiform Components
Publisher: American Meteorological Society
Abstract: Simulated data from the UCLA Cumulus Ensemble Model (CEM) are analyzed to partition mass, heat, and moisture budgets of cumulus ensembles into convective and stratiform components. A method based primarily on the horizontal ...
Evaluation of Cloud Physical Properties of ECMWF Analysis and Re-Analysis (ERA) against CERES Tropical Deep Convective Cloud Object Observations
Publisher: American Meteorological Society
Abstract: This study presents an approach that converts the vertical profiles of grid-averaged cloud properties from large-scale models to probability density functions (pdfs) of subgrid-cell cloud physical properties measured at ...
Using the Bootstrap Method for a Statistical Significance Test of Differences between Summary Histograms
Publisher: American Meteorological Society
Abstract: A new method is proposed to compare statistical differences between summary histograms, which are the histograms summed over a large ensemble of individual histograms. It consists of choosing a distance statistic for ...
The Sensitivity of Diagnostic Radiative Properties to Cloud Microphysics among Cloud-Resolving Model Simulations
Publisher: American Meteorological Society
Abstract: This study examines the sensitivity of diagnosed radiative fluxes and heating rates to different treatments of cloud microphysics among cloud-resolving models (CRMs). The domain-averaged CRM outputs are used in this ...
Semiprognostic Tests of the Arakawa-Schubert Cumulus Parameterization Using Simulated Data
Publisher: American Meteorological Society
Abstract: The Arakawa-Schubert (A-S) cumulus parameterization is evaluated by performing semiprognostic tests against data simulated by a cumulus ensemble model (CEM). The CEM is a two-dimensional cloud model for simulating the ...
A PDF-Based Microphysics Parameterization for Simulation of Drizzling Boundary Layer Clouds
Publisher: American Meteorological Society
Abstract: Formulating the contribution of subgrid-scale (SGS) variability to microphysical processes in boundary layer and deep convective cloud parameterizations is a challenging task because of the complexity of microphysical ...
Evaluating Low-Cloud Simulation from an Upgraded Multiscale Modeling Framework Model. Part II: Seasonal Variations over the Eastern Pacific
Publisher: American Meteorological Society
Abstract: he eastern Pacific is a climatologically important region. Conventional coupled atmosphere?ocean general circulation models produce positive sea surface temperature biases of 2?5 K in this region because of insufficient ...
Evaluating Low-Cloud Simulation from an Upgraded Multiscale Modeling Framework Model. Part III: Tropical and Subtropical Cloud Transitions over the Northern Pacific
Publisher: American Meteorological Society
Abstract: n analysis of simulated cloud regime transitions along a transect from the subtropical California coast to the tropics for the northern summer season (June?August) is presented in this study. The Community Atmosphere Model, ...
Evaluating Low-Cloud Simulation from an Upgraded Multiscale Modeling Framework Model. Part I: Sensitivity to Spatial Resolution and Climatology
Publisher: American Meteorological Society
Abstract: he multiscale modeling framework, which replaces traditional cloud parameterizations with a 2D cloud-resolving model (CRM) in each atmospheric column, is a promising approach to climate modeling. The CRM component contains ...