Naslov
Two length-scales for inclined stable boundary layers

Autori
Grisogono, Branko ; Belušic, Danijel

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
12th International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes : HARMO12 ; u: Hrvatski meteorološki časopis 43 (2008) / - Zagreb : Hrvatsko meteorološko društvo (HMD), 2008, 43-43

Skup
International Conference on Harmonisation within Atmospheric Dispersion Modelling for Regulatory Purposes (12 ; 2008)

Mjesto i datum
Cavtat, Hrvatska, 06.10.2008. - 09.10.2008

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
atmospheric turbulence; MIUU model; numerical modeling; Monin-Obukhov length; Prandtl model;

Sažetak
We improve 2 characteristic length-scales: Monin- Obukhov length and the "z-less" mixing length- scale for parameterization of turbulent processes in stable atmospheric boundary layers (SABL) over sloped surfaces. Since SABL structures are far from being understood properly today, their parameterizations or explicit treatment are still usually very sketchy in most mesoscale and climate models as well as in related transport and dispersion models. Typically an over-diffusion through the SABL occurs in most of numerical models. With the "z-less" mixing length-scale proposed here the overdiffusion is absent. Moreover, the mesoscale model used, MIUU model, gave results similar to those from an improved Prandtl model, i.e. katabatic flow occupying the lower and more active part of the SABL developed in both models. The corresponding low-level jet occurring in the strong near-surface inversion appears similar in both models. Certain details vary simply because of very different nature of the models deployed. The results could be used in different types of numerical modeling, parameterizations of the SABL, air-pollution transport and dispersion and further development of analytical models and data interpretation.

Izvorni jezik
Engleski

Znanstvena područja
Geologija

Napomena
Prethodno prijavljeni naslov rada djelomice je drugaciji od onog sto je stvarno prezentirano i diskutirano na konferenciji (prosirenije).

POVEZANOST RADA