Izvorni znanstveni članak
ALADIN/HR: TESTING THE NEW SEMI-LAGRANGIAN HORIZONTAL DIFFUSION SCHEME
Martina Tudor
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
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
Datum izdavanja:
15.12.2005.
Posjeta: 1.024 *