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The AROME-France Convective-Scale Operational Model

2010; American Meteorological Society; Volume: 139; Issue: 3 Linguagem: Inglês

10.1175/2010mwr3425.1

1520-0493

Yann Seity, Pierre Brousseau, Sylvie Malardel, Gwenaëlle Hello, Pierre Bénard, François Bouttier, Christine Lac, Valéry Masson,

Wind and Air Flow Studies

Abstract After six years of scientific, technical developments and meteorological validation, the Application of Research to Operations at Mesoscale (AROME-France) convective-scale model became operational at Météo-France at the end of 2008. This paper presents the main characteristics of this new numerical weather prediction system: the nonhydrostatic dynamical model core, detailed moist physics, and the associated three-dimensional variational data assimilation (3D-Var) scheme. Dynamics options settings and variables are explained. The physical parameterizations are depicted as well as their mutual interactions. The scale-specific features of the 3D-Var scheme are shown. The performance of the forecast model is evaluated using objective scores and case studies that highlight its benefits and weaknesses.