Orographic influence on deep convection: case study and sensitivity experiments (Contributo in atti di convegno)

Type
Label
  • Orographic influence on deep convection: case study and sensitivity experiments (Contributo in atti di convegno) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Alternative label
  • S. Davolio, A. Buzzi and P. Malguzzi (2005)
    Orographic influence on deep convection: case study and sensitivity experiments
    in International Conf on Alpine Meteorology (ICAM) - MAP Meeting 2005, Zadar (Croatia), 23-27 May 2005
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • S. Davolio, A. Buzzi and P. Malguzzi (literal)
Pagina inizio
  • 159 (literal)
Pagina fine
  • 162 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#titoloVolume
  • Proc. of the Intern. Conf on Alpine Meteorol. (ICAM) - MAP Meeting 2005 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 4 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • CNR ISAC (literal)
Titolo
  • Orographic influence on deep convection: case study and sensitivity experiments (literal)
Abstract
  • The non hydrostatic convection resolving model MOLOCH is employed in order to evaluate its capability to realistically simulate the evolution of a mesoscale convective system responsible for an episode of heavy rainfall and flood over southeastern France (Gard event). Numerical experiments indicate large sensitivity of precipitation amounts and distribution, due to different cell organization and propagation, to the specification of the initial conditions. Further experiments, aimed at studying the role played by the orography in triggering the convection and controlling its evolution, have been performed in order to characterize sensitivity to ambient wind and orography. Although the convective system remained almost stationary for many hours with maximum precipitation located at some distance upstream of the mountain main slope, simulations demonstrate that the presence of the orographic barrier is essential for both triggering and maintaining the mesoscale convective system. The intensity of precipitation turns out to be sensitive to small variations of the mean meridional wind component. (literal)
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