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Titolo:
SIMULATION OF AN OBSERVED SQUALL LINE WITH A MESO-BETA-SCALE HYDROSTATIC MODEL
Autore:
DUCROCQ V; BOUGEAULT P;
Indirizzi:
METEO FRANCE,CTR NATL RECH METEOROL,42 AVE CORIOLIS F-31057 TOULOUSE FRANCE
Titolo Testata:
Weather and forecasting
fascicolo: 2, volume: 10, anno: 1995,
pagine: 380 - 399
SICI:
0882-8156(1995)10:2<380:SOAOSL>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
1985 PRE-STORM; NUMERICAL-SIMULATION; MOMENTUM BUDGET; PARAMETERIZATION; MESOSCALE; PRECIPITATION; PREDICTION; SYSTEMS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
37
Recensione:
Indirizzi per estratti:
Citazione:
V. Ducrocq e P. Bougeault, "SIMULATION OF AN OBSERVED SQUALL LINE WITH A MESO-BETA-SCALE HYDROSTATIC MODEL", Weather and forecasting, 10(2), 1995, pp. 380-399

Abstract

This paper reports on simulations of an observed squall line with themeso-beta-scale hydrostatic PERIDOT model. An attempt is made to answer the question of what model changes are necessary to roughly simulate a squall line with a hydrostatic model lacking explicit microphysics. A qualitatively satisfactory simulation is obtained by modifying thephysical package of the model and by increasing the resolution compared to that of the operational model. Sensitivity experiments are conducted in order to determine the necessary components for the simulationof the squall line. The authors find that both increased resolution and a downdraft parameterization are required. The energetics of the inner circulation of the squall line are investigated using the best simulation. The main supply for the rear to front now is identified as conversion of potential energy into kinetic energy, which is linked to the line-normal horizontal gradient of perturbation pressure. This result agrees with the conclusions of the sensitivity experiments and withprevious studies on the important role played by the density current in squall-line propagation.

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Documento generato il 04/12/20 alle ore 13:27:12