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Titolo:
Initialization of a fine-scale model for convective-system prediction: A case study
Autore:
Ducrocq, V; Lafore, JP; Redelsperger, JL; Orain, F;
Indirizzi:
CNRM, GMME, Meteo France, F-31057 Toulouse 1, France CNRM Toulouse France 1 M, GMME, Meteo France, F-31057 Toulouse 1, France CNRM, CNRS, F-31057 Toulouse, France CNRM Toulouse France F-31057CNRM, CNRS, F-31057 Toulouse, France
Titolo Testata:
QUARTERLY JOURNAL OF THE ROYAL METEOROLOGICAL SOCIETY
fascicolo: 570, volume: 126, anno: 2000,
parte:, B
pagine: 3041 - 3065
SICI:
0035-9009(200010)126:570<3041:IOAFMF>2.0.ZU;2-L
Fonte:
ISI
Lingua:
ENG
Soggetto:
DOPPLER RADAR OBSERVATIONS; MICROPHYSICAL RETRIEVAL; SQUALL LINES; CLOUD MODEL; STORM; MESOSCALE; ADJOINT; FIELDS;
Keywords:
convection; fine-scale numerical prediction; initialization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
31
Recensione:
Indirizzi per estratti:
Indirizzo: Ducrocq, V CNRM, GMME, Meteo France, 42 Av Coriolis, F-31057 Toulouse 1, France CNRM 42 Av Coriolis Toulouse France 1 31057 Toulouse 1, France
Citazione:
V. Ducrocq et al., "Initialization of a fine-scale model for convective-system prediction: A case study", Q J R METEO, 126(570), 2000, pp. 3041-3065

Abstract

This paper focuses on the problem of the initialization of a fine-scale (2.5 km resolution) model with observational data. An approach combining optimal interpolation (GI) analysis and bogussing methods was designed. The information provided by surface mesonet observations (relative humidity, temperature and winds) is incorporated by means of a mesoscale (OI) analysis. Simple cloud and precipitation analyses based on conventional radar reflectivities and infrared satellite data help to adjust the humidity and hydrometeor fields of the initial state. With this initialization procedure the resulting initial state describes the signature of mesoscale convective systems. This technique is applied to one observed mesoscale convective system to produce an initial state describing a one-hour-old developing convective system. From this initial state, the mesoscale nonhydrostatic model, named MESO-NH, succeeds in simulating a convective line organization which is close to observations. Experiments to determine the sensitivity to the initial state definition and to the model characteristics are carried out and the initialization procedure is found to be instrumental in a successful simulation; both the surface-data analysis and the cloud analysis are required.

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Documento generato il 04/12/20 alle ore 13:04:07