The Meso-NH Atmospheric Simulation System. Part I: adiabatic formulation and control simulations
Jean-Philippe Lafore,Joël Stein,Nicole Asencio,Philippe Bougeault,Véronique Ducrocq,J. Duron,C. Fischer,P. Héreil,Patrick Mascart,Valéry Masson,Jean-Pierre Pinty,Jean-Luc Redelsperger,Evelyne Richard,J. Vilà-Guerau de Arellano +13 more
TLDR
The Meso-NH Atmospheric Simulation Engine as mentioned in this paper is a tool for small and meso-scale atmospheric processes, which is based on the Lipps and Hemler form of the anelastic system.Abstract:
The Meso-NH Atmospheric Simulation Sys- tem is a joint eAort of the Centre National de Recher- ches Meteorologiques and Laboratoire d'Aerologie. It comprises several elements; a numerical model able to simulate the atmospheric motions, ranging from the large meso-alpha scale down to the micro-scale, with a comprehensive physical package, a flexible file manager, an ensemble of facilities to prepare initial states, either idealized or interpolated from meteorological analyses or forecasts, a flexible post-processing and graphical facility to visualize the results, and an ensemble of interactive procedures to control these functions. Some of the distinctive features of this ensemble are the following: the model is currently based on the Lipps and Hemler form of the anelastic system, but may evolve towards a more accurate form of the equations system. In the future, it will allow for simultaneous simulation of several scales of motion, by the so-called ''interactive grid-nesting technique''. It allows for the in-line com- putation and accumulation of various terms of the budget of several quantities. It allows for the transport and diAusion of passive scalars, to be coupled with a chemical module. It uses the relatively new Fortran 90 compiler. It is tailored to be easily implemented on any UNIX machine. Meso-NH is designed as a research tool for small and meso-scale atmospheric processes. It is freely accessible to the research community, and we have tried to make it as ''user-friendly'' as possible, and as general as possible, although these two goals sometimes appear contradictory. The present paper presents a general description of the adiabatic formulation and some of the basic validation simulations. A list of the currently available physical parametrizations and ini- tialization methods is also given. A more precise description of these aspects will be provided in a further paper.read more
Citations
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High-resolution numerical simulations of the convective system observed in the Lago Maggiore area on 17 September 1999 (MAP IOP 2a)
TL;DR: In this article, during Intensive Observing Period (IOP) 2a of the Mesoscale Alpine Programme (MAP) a significant convective system developed in the Lago Maggiore area and its evolution is simulated using the Meso-NH model run over three nested domains with a 2 km horizontal resolution for the finest grid.
Journal ArticleDOI
The 8 and 9 September 2002 flash flood event in France: a model intercomparison
Sandrine Anquetin,Eddy Yates,Véronique Ducrocq,S. Samouillan,Katia Chancibault,Silvio Davolio,Christophe Accadia,M. Casaioli,S. Mariani,Gianluca Ficca,Bernardo Gozzini,F. Pasi,Massimiliano Pasqui,A. Garcia,M. Martorell,Romualdo Romero,P. Chessa +16 more
TL;DR: In this paper, the authors present the results of the evaluation methodology proposed by Yates et al. (2005) that highlights the relevant hydrological scales of a simulated rain field and draw some recommendations on the value of the quantitative precipitation forecasts and way to use it for quantitative discharge forecasts within mountainous areas.
Journal ArticleDOI
High-Resolution Large-Eddy Simulations of Scalar Transport in Atmospheric Boundary Layer Flow over Complex Terrain
TL;DR: In this article, high-resolution numerical simulations of the atmospheric flow and concentration fields accompanying scalar transport and diffusion from a point source in complex terrain are presented, where large-eddy simulation is used to provide modeling advantages through the use of robust turbulence models combined with the influence of synoptic flow forcing and heterogeneous land surface forcing.
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Low stratospheric water vapor measured by an airborne DIAL
TL;DR: In this article, water vapor measurements were performed with a newly developed airborne water vapor differential absorption lidar (DIAL), which consists of an injection-seeded optical parametric oscillator at a signal wavelength of ≈940 nm capable of measuring very low values of water vapor.
Journal ArticleDOI
Lagrangian description of airflows using Eulerian passive tracers
François Gheusi,Joel Stein +1 more
TL;DR: In this paper, a method of tracking coherent Lagrangian airmasses is presented, which is not based on the computation of individual trajectories, but rather on three Eulerian passive tracers initialized with the coordinates of each grid cell.
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