Naslov
The ABL due to a Mountain Pass and Coriolis Effect

Autori
Grisogono, Branko ; Enger, Leif ; Belušić, Danijel

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Hrvatski meteorološki časopis / Đuričić, Vesna - Zagreb : Hrvatsko meteorološko društvo (HMD), 2005, 329-332

Skup
The 28th International Conference on Alpine Meteorology (ICAM) and the Annual Scientific Meeting of the Mesoscale Alpine Programme (MAP)

Mjesto i datum
Zadar, Hrvatska, 23.05.2005. - 27.05.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Wave-breaking; Coriolis; Low-level jet; Turbulence; Mountain waves; Numerical model

Sažetak
Idealized airflow over a mountain with a pass is studied using a numerical mesoscale model with a trustful higher-order turbulence parameterization scheme. A uniformly stratified inflow of 8 m/s over mountain, 100km x 20km x 1km, yields Froude number 0.6, while Rossby number along the flow ranges from 7.6 to infinity. A pass drops the mountain top to ~ 400m locally increasing Froude number and modifying the overall wave breaking and the ABL. In the presence of the Earth rotation, f ≠ 0, which already breaks the lee-side flow symmetry, the pass induces additional variations in the ABL extending far from the mountain. Both, the rotation and the pass, alter the low-level jet structure and the specific humidity field. This mesoscale process may stretch to synoptic scale within a reasonable time, say 15-25h, only when the rotation is included. Otherwise, a somewhat similar process with f=0 might take unreasonably long time.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

POVEZANOST RADA