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RISThe Usefulness and Economic Value of Total Lightning Forecasts Made with a Dynamic Lightning Scheme Coupled with Lightning Data Assimilation
Publisher: American Meteorological Society
Abstract: otal lightning probability forecasts for 26 mostly springtime days and 27 summertime days were analyzed for their usefulness and economic value. The mostly springtime forecast days had a relatively high number of severe ...
Using Similarity Theory to Parameterize Mesoscale Heat Fluxes Generated by Subgrid-Scale Landscape Discontinuities in GCMs
Publisher: American Meteorological Society
Abstract: Similarity theory was used to develop a parameterization of mesoscale heat fluxes induced by landscape discontinuities for large-scale atmospheric models (e.g., general circulation models). For this purpose, Buckingham Pi ...
A Parameterization for the Triggering of Landscape-Generated Moist Convection. Part II: Zero-Order and First-Order Closure
Publisher: American Meteorological Society
Abstract: To improve the triggering of clouds over landscape heterogeneity, it is suggested that the forcing by mesoscale circulations generated by landscape patches be included. For this purpose, it is suggested that a relatively ...
An Evaluation of the Efficacy of Using Observed Lightning to Improve Convective Lightning Forecasts
Publisher: American Meteorological Society
Abstract: ynamic lightning forecasts [total and cloud to ground (CG)] were produced on a convection-allowing forecast grid with 4-km grid spacing with lightning assimilation (ASML) and without lightning assimilation [control (CNTL)]. ...
The Importance of Mesoscale Circulations Generated by Subgrid-Scale Landscape Heterogeneities in General Circulation Models
Publisher: American Meteorological Society
Abstract: A mesoscale atmospheric model was used to evaluate the impact of subgrid-scale landscape discontinuities on the vertical profiles of resolved temperature, moisture, and moist static energy in the planetary boundary layer ...
A Parameterization for the Triggering of Landscape-Generated Moist Convection. Part I: Analysis of High-Resolution Model Results
Publisher: American Meteorological Society
Abstract: To develop a parameterization for the triggering of moist convection by landscape-generated mesoscale circulations, a set of relatively high-resolution three-dimensional (3D) simulations was produced. These simulations ...
A Study of Landscape-Generated Deep Moist Convection
Publisher: American Meteorological Society
Abstract: A two-dimensional version of a cloud-resolving model was used to study the generation of deep moist convection over heterogeneous landscapes. Alternating patches of dry and wet soil were simulated for various profiles of ...
An Analysis of the Potential for Extreme Temperature Change Based on Observations and Model Simulations
Publisher: American Meteorological Society
Abstract: The study analyzes observational climate data for June?August 1977?2004 and simulations of current and future climate scenarios from a nested GCM/regional climate model system to assess the potential for extreme temperature ...
The Influence of Soil Moisture, Coastline Curvature, and Land-Breeze Circulations on Sea-Breeze-Initiated Precipitation
Publisher: American Meteorological Society
Abstract: Idealized numerical simulations of Florida convection are performed with a coupled atmosphere?land surface model to identify the roles of initial soil moisture, coastline curvature, and land-breeze circulations on ...
Spectral (Bin) Microphysics Coupled with a Mesoscale Model (MM5). Part I: Model Description and First Results
Publisher: American Meteorological Society
Abstract: Considerable research investments have been made to improve the accuracy of forecasting precipitation systems in cloud-resolving, mesoscale atmospheric models. Yet, despite a significant improvement in model grid resolution ...