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RISNumerical Simulation of Flow Diversion around the Pyrenees: A Tramontana Case Study
Publisher: American Meteorological Society
Abstract: The intensive observing period (IOP) 6 of the Pyrenees Experiment (PYREX) has been simulated with a hydrostatic three-dimensional model. The PYREX IOP 6 was devoted to the observation of a regional wind, the tramontana, ...
Effects of Different Rain Parameterizations on the Simulation of Mesoscale Orographic Precipitation
Publisher: American Meteorological Society
Abstract: A detailed comparison is made between the results obtained from two microphysical parameterizations capable of simulating cloud and precipitation processes in a mesoscale model. The behavior of each microphysical scheme ...
The Influence of Soil and Vegetation on the Development of Mesoscale Circulations
Publisher: American Meteorological Society
Abstract: A two-dimensional mesoscale model including a detailed representation of the planetary boundary layer, the soil and the vegetation is developed. A sea breeze over flat terrain is simulated, thereby confirming the ability ...
The Impact of Diurnal Cycle on a Low-Froude Number Flow Observed during the PYREX Experiment
Publisher: American Meteorological Society
Abstract: The intensive observing period (IOP) 4 of the Pyrenees Experiment (PYREX) has been simulated with a hydrostatic three-dimensional model. The PYREX IOP 4 was devoted to the observation of the orographically generated flow ...
The Role of Surface Friction in Downslope Windstorms
Publisher: American Meteorological Society
Abstract: Numerical simulations of the 11 January 1972 windstorm in Boulder, Colorado, were carded out using a hydrostatic model with a turbulent kinetic energy parameterization to investigate the role of fictional effects in the ...
Trapped Lee Waves Observed during PYREX by Constant Volume Balloons: Comparison with Meso-NH Simulations
Publisher: American Meteorological Society
Abstract: The main objective of the present paper is the use of a constant volume balloon (CVB) as a tool to (i) study trapped lee waves and (ii) assess the forecasting capability of a nonhydrostatic numerical model. Then, CVB data ...
Numerical Simulation of Orographic Enhancement of Rain with a Mesoscale Model
Publisher: American Meteorological Society
Abstract: Orographic precipitation enhancement associated with the feeder mechanism proposed by Bergeron has been simulated using a two dimensions model based upon primitive equations including detailed parameter microphysics. A ...
Impact of Subgrid-Scale Orography Parameterization on the Simulation of Orographic Flows
Publisher: American Meteorological Society
Abstract: A subgrid-scale orography parameterization based upon the use of an effective roughness length has been implemented in a mesobeta-scale model. The impact of such a parameterization is investigated in the framework of ...
An investigation of Mesoscale Flows Induced by Vegetation Inhomogeneities Using an Evapotranspiration Model Calibrated Against HAPEX-MOBILHY Data
Publisher: American Meteorological Society
Abstract: Many recent studies have suggested that heterogeneities in soil properties or vegetation characteristics many trigger mesoscale circulations in planetary boundary layer (PBL). Unfortunately, these flows appear to be very ...
The Numerical Simulation of Clouds, Rains and Airflow over the Vosges and Black Forest Mountains: A Meso-β Model with Parameterized Microphysics
Publisher: American Meteorological Society
Abstract: A three-dimensional meso-? model with parameterized microphysics is presented. The model is capable of simulating orographically forced clouds, rain, and airflow. Tests using a two-dimensional version confirm the ability ...