Naslov
"Comparison of the Prandtl model with K(z) and non-zero f with Doppler sodar observations"

Autori
Kavčič, Iva ; Grisogono, Branko ; Renfrew, Ian A. ; Anderson, Philip S. ; Večenaj, Željko ; Stiperski, Ivana

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

Izvornik
29th International Conference on Alpine Meteorology - Extended Abstracts / - : Météo-France, 2007, 597-600

Skup
29th International Conference on Alpine Meteorology

Mjesto i datum
Chambéry, Francuska, 04.06.2007. - 08.06.2007

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Stable boundary layer; Prandtl model; Doppler sodar data

Sažetak
We present the analytical and numerical solutions for (U, V) depending on (z, t) in the katabatic flow, where U and V are the downslope and cross-slope wind components. The solutions for (U, V) from the recently extended analytical 1D Prandtl model are verified against observations (the 15-min averages) from a novel autonomous Doppler sodar wind profiling system in Antarctica. Two cases of the wintertime, primarily katabatically driven, flows with the different stability values are investigated. The analytical and numerical model parameters are calculated from the Doppler sodar and AWS (automatic weather station) data. Observations of the downslope component are generally better described by the model solutions, especially in the case of the stronger stability. The model solutions for V agree qualitatively with the observations, but are not accurate enough in determining the height and the speed of the V maximum. Therefore, further improvements of the Prandtl model will be amendable as well as recommendations for a better parameterization of katabatic flows in large-scale numerical models.

Izvorni jezik
Engleski

Znanstvena područja
Matematika, Geologija

POVEZANOST RADA