- Atmospheric Dynamics Group


SIMULATION RESULTS FOR MAP EPISODES
(FLOODS, HEAVY PRECIPITATIONS)



Simulation of Brig Episode - Horizontal Resolution 10 km


Model Used: BOlogna Limited Area Model, Version 3 (BOLAM3).
Providers: Andrea Buzzi and Luigi Foschini

BOLAM3 Main Features:
Model dynamics:
- Primitive equations;
- Dependent variables: u, v, theta, q, ps (+ 5 microphysical variables);
- Arakawa C grid;
- New forward-backward (FB) 3-D advection scheme coupled with semi-lagrangian advection of hydrometeors;
- Split-explicit time scheme (FB for gravity modes);
- 4th order horizontal diffusion and 2nd order divergence diffusion;
- Davies-Kallberg-Lehmann relaxation scheme for lateral boundary conditions.
Activated physical parametrizations:
- Dry adiabatic adjustments;
- Radiation: infrared and solar, interacting with clouds (Ritter and Geleyn);
- Vertical diffusion (surface layer and PBL parameterization) depending on Ri;
- Surface thermal and water balance (3 soil layers);
- Explicit microphysical scheme with 5 hydrometeors (cloud ice, cloud water, rain, snow, hail/graupel);
- Convective parameterization: Kain-Fritsch (modified according to Spencer & Stensrud of NSSL/NOAA, USA).

Initial and lateral boundary conditions: ECMWF analyses at 0.5 x 0.5 deg. resolution, distributed by MAP Data Centre on CD-ROM. Data available every 6 hours.



Vaison-La-Romaine (September 22, 1992)

Brig (September 23-25, 1993)

Piemonte (November 4-6, 1994)

South Ticino (September 12-13, 1995)

Heavy precipitation in Friuli (September 19, 1995)

ON-LINE PUBLICATIONS

  • M. Miglietta and A. Buzzi: Study of moist flow over an isolated 3D topography with a mesoscale model, MAP Meeting '99, Appenzell (Switzerland), June 9-11, 1999 (abstract). See also MAP Newsletters 11, (1999).
  • S. Davolio and M. Fantini: Semigeostrophic modeling of orographic cyclones, MAP Meeting '99, Appenzell (Switzerland), June 9-11, 1999 (abstract). See also MAP Newsletters 11, (1999).
  • A. Buzzi and L. Foschini: Mesoscale meteorological features and characteristics of precipitation fields insimulations of MAP episodes, MAP Meeting '99, Appenzell (Switzerland), June 9-11, 1999 (abstract). See also MAP Newsletters 11, (1999).
  • L. Foschini and A. Buzzi: The impact of convective parameterization characteristics on the simulation of orographic precipitation, XXIV General Assembly of the European Geophysical Society, Den Haag (The Netherlands), April 19-23, 1999 (abstract).
  • M. Fantini, S. Davolio and P. Malguzzi: A semigeostrophic model of frontal interaction with isolated orography, XXIV General Assembly of the European Geophysical Society, Den Haag (The Netherlands), April 19-23, 1999 (abstract).
  • A.Buzzi and L.Foschini: Numerical experiments on the dynamical effects of latent heat exchanges and topographic forcing in MAP case studies, MAP Meeting '98, Chamonix (France), June 17-19, 1998 (abstract). See also MAP Newsletter 9, (1998).
  • E. Richard, J. Charney, S. Cosma, R. Benoit, S. Chamberland, A. Buzzi, L. Foschini, R. Ferretti, J. Stein: Intercomparison of simulated precipitation fields for some MAP episodes, MAP Newsletter 9, (1998).

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    Last update: 26 October 1999