Naslov
ALADIN/HR: testing the new sub-grid scale orography representation on bura cases

Autori
Drvar, Dunja ; Stiperski, Ivana ; Tudor, Martina ; Tutiš, Vlasta

Izvornik
Hrvatski meteorološki časopis (1330-0083) 40 (2005); 304-307

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
orography; envelope; gravity wave drag; parametrization; bura

Sažetak
Especially important for the coastal area of Croatia is the wind forecast, particularly during the bura windstorm episodes. Current operational version of ALADIN model is rather satisfactory for the wind field forecast, although in many cases the wind speed is somewhat overestimated. A modified sub-grid scale orography representation was introduced and tested. The envelope was removed and to compensate for the loss of volume, changes in gravity wave drag parametrisation were introduced. New orography representation resulted in slight enhancement of upstream and general decrease of downstream wind speed, as well as reduction of mountain wave amplitude.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA