A radar observation operator for high resolution non hydrostatic numerical weather prevision.

Olivier Caumont (1) , Véronique Ducrocq (1) , G. Delrieu (2) , M. Gosset (2) , Jacques Parent Du Châtelet (3) , Jean-Pierre Pinty (4) , Hervé Andrieu (5) , Yvon Lemaître (6) , Georges Scialom (6)

1 CNRM - Centre national de recherches météorologiques
2 LTHE - Laboratoire d'étude des transferts en hydrologie et environnement
3 DSO - Direction des Systèmes d'Observation [Toulouse]
4 LAERO - Laboratoire d'aérologie
5 IFSTTAR - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux
6 CETP - Centre d'étude des environnements terrestre et planétaires

In order to specify an observation operator for radar reflectivities for the next numerical weather prediction model of Météo-France, a radar simulator was implemented in the research model Meso-NH. This tool was made up of building blocks that each describe a particular physical process (scattering, beam bending, etc.). Sensitivity experiments were carried out using different configurations for the modules. They allowed to specify an observation operator as a compromise between accuracy and computing constraints.

Domaines: Océan, Atmosphère; Météorologie

Olivier Caumont, Véronique Ducrocq, G. Delrieu, M. Gosset, Jacques Parent Du Châtelet, et al.. A radar observation operator for high resolution non hydrostatic numerical weather prevision.. ERAD 2004, 2004, Visby, Sweden. pp.474-480. ⟨hal-00159916⟩