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RISAn Idealized Two-Dimensional Framework to Study the West African Monsoon. Part II: Large-Scale Advection and the Diurnal Cycle
Publisher: American Meteorological Society
Abstract: The idealized 2D model developed in Part I of this study is used to study the West African monsoon sensitivity to large-scale forcing. Using ECWMF reanalyses, a large-scale forcing is introduced in the 2D model in terms ...
A Coordinate Transformation for Objective Frontal Analysis
Publisher: American Meteorological Society
Abstract: The analysis of a frontal discontinuity is difficult as the hypothesis of isotropy commonly assumed by inter- polation schemes is obviously erroneous in that case. Starting from the semigeostrophic theory, the authors ...
A Numerical Investigation of the Organization and Interaction of the Convective and Stratiform Regions of Tropical Squall Lines
Publisher: American Meteorological Society
Abstract: A set of 13 two-dimensional numerical simulations based on the 22 and 23 June Soundings from the ConvectionProfonde Tropicale in 1981 (COPT81) experiment in West Africa is used to study the organization and interactionof ...
A Three-Dimensional Simulation of a Tropical Squall Line: Convective Organization and Thermodynamic Vertical Transport
Publisher: American Meteorological Society
Abstract: Three-dimensional convective-scale simulations of an African squall line, observed during the French COPT 81 experiment, are presented. Three simulations with different representations of large-scale forcing are performed ...
Intraseasonal Variability of the Saharan Heat Low and Its Link with Midlatitudes
Publisher: American Meteorological Society
Abstract: The Saharan heat low (SHL) is thought to be a key feature of the West African monsoon, and its variations during the summer season have not yet been systematically assessed. To characterize the intraseasonal variations of ...
Reply to “Comments on ‘A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part I: The Models’”
Publisher: American Meteorological Society
A Density Current Parameterization Coupled with Emanuel’s Convection Scheme. Part I: The Models
Publisher: American Meteorological Society
Abstract: The aim of the present series of papers is to develop a density current parameterization for global circulation models. This first paper is devoted to the presentation of this new wake parameterization coupled with Emanuel?s ...
A Numerical Study of a Nontornadic Supercell over France
Publisher: American Meteorological Society
Abstract: A case of a nontornadic supercell over France is simulated with a three-dimensional nonhydrostatic cloud model. The simulation starts from an operational data analysis without any superimposed perturbation. The initial ...
Comparison between a Three-Dimensional Simulation and Doppler Radar Data of a Tropical Squall Line: Transports of Mass, Momentum, Heat, and Moisture
Publisher: American Meteorological Society
Abstract: Results from a detailed three-dimensional cloud model are extensively compared with Doppler radar data in the case of a fast-moving tropical squall line, observed during the COPT81 experiment. The comparisons use a ...
An Idealized Two-Dimensional Framework to Study the West African Monsoon. Part I: Validation and Key Controlling Factors
Publisher: American Meteorological Society
Abstract: An idealized vertical?meridional zonally symmetric model is developed in order to recover a July typical monsoon regime over West Africa in response to surface conditions. The model includes a parameterization to account ...