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Hrvatski meteorološki časopis, Vol. 40 No. 40, 2005.

Izvorni znanstveni članak

ALADIN/HR: TESTING THE NEW SEMI-LAGRANGIAN HORIZONTAL DIFFUSION SCHEME

Martina Tudor orcid id orcid.org/0000-0002-2683-2652 ; Croatian Meteorological and Hydrological Service, Grič 3, 10000 Zagreb
Vlasta Tutiš ; Croatian Meteorological and Hydrological Service, Grič 3, 10000 Zagreb
Dunja Drvar ; Croatian Meteorological and Hydrological Service, Grič 3, 10000 Zagreb
Ivana Stiperski ; Croatian Meteorological and Hydrological Service, Grič 3, 10000 Zagreb
Filip Vaña ; Croatian Meteorological and Hydrological Service, Grič 3, 10000 Zagreb

Puni tekst: engleski pdf 1.091 Kb

str. 346-349

preuzimanja: 388

citiraj

Sažetak

Main role of the horizontal diffusion schemes in numerical models nowadays is to remove the information without forecast value and the energy accumulated due to finite truncation of a model
spectrum acting as a numerical filter. However, during intensive cyclogenesis, especially over steep surfaces, the physical horizontal diffusion should not be neglected. A stable and efficient non-linear
horizontal diffusion, based on the control of the degree of interpolation needed for the Semi-Lagrangian advection scheme, has been implemented in ALADIN. The results of several numerical experiments show better simulation of a mesoscale Adriatic cyclones, upper troposphere cyclones and beneficial impact on forecast of low cloudiness in anticyclones.

Ključne riječi

Semi-Lagrangian; horizontal diffusion; Adriatic cyclone

Hrčak ID:

64607

URI

https://hrcak.srce.hr/64607

Datum izdavanja:

15.12.2005.

Posjeta: 807 *