Large-Eddy Simulation of the sea breeze over a Mediterranean peninsula, (Comunicazione a convegno)

Type
Label
  • Large-Eddy Simulation of the sea breeze over a Mediterranean peninsula, (Comunicazione a convegno) (literal)
Anno
  • 2013-01-01T00:00:00+01:00 (literal)
Alternative label
  • M.M. Miglietta and U. Rizza (2013)
    Large-Eddy Simulation of the sea breeze over a Mediterranean peninsula,
    in 13th EMS Annual Meeting & 11th European Conference on Applications of Meteorology (ECAM), Reading, United Kingdom, 09 - 13 September 2013
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M.M. Miglietta and U. Rizza (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • ISAC/CNR - Italy (literal)
Titolo
  • Large-Eddy Simulation of the sea breeze over a Mediterranean peninsula, (literal)
Abstract
  • Many mesoscale thermally induced atmospheric motions may be regarded as gravity currents. Land/sea breezes and thunderstorm outflows are typical examples of gravity currents. A large number of laboratory have demonstrated that there are many dynamical similarities between laboratory density currents and atmospheric mesofronts such as thunderstorm outflows and land/sea breezes. The most important feature is the Kelvin-Helmotz instability (KHI) that occurs at the leading edge of the head of gravity current and are the responsible for the mixing between different density fluids. As the sea/land breeze forms near the coast, its head intrudes into the inland ambient air with a temperature stratification that changes with the same time scale as that of the sea/land breeze itself. This means that the structure and dynamics of the gravity current are influenced and modified by changing temperature stratification. In reality, the sea-breeze circulation is a complex phenomenon as it can be modified by many processes such as the synoptic forcing, the shape of coastline, orography, turbulence and cloud cover. A realistic simulation of the sea-breeze would require a model that can simulate the mesoscale sea-breeze circulation together with the small scale turbulent convective boundary layer that is developed over the heated land. A powerful tool for investigating the physics and dynamics of the changing gravity currents in the atmosphere is the large-Eddy Simulation (LES) numerical model. It defines three dimensional meteorological fields with high-enough resolution in the lowest few kilometers of the PBL and the it may be used to examine separately a whole range of atmospheric parameters. Our objective is to investigate the non linear interactions between the sea breeze and the convective turbulence overland. To achieve this purpose we need a model that is able to reproduce the required horizontal inhomogeneities in surface heat flux and drag coefficients as well as the turbulent eddies in the Planetary Boundary Layer. (literal)
Prodotto di
Autore CNR
Insieme di parole chiave

Incoming links:


Prodotto
Autore CNR di
Insieme di parole chiave di
data.CNR.it