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A summertime near-ground velocity profile of the Bora wind


Lepri, Petra; Kozmar, Hrvoje; Večenaj, Željko; Grisogono, Branko
A summertime near-ground velocity profile of the Bora wind // Proceedings of the 2014 World Congress on Advances in Civil, Environmental and Materials Research / Choi, Chang-Koon (ur.).
Daejeon: Techno Press, 2014. str. 78-78 (predavanje, međunarodna recenzija, sažetak, znanstveni)


Naslov
A summertime near-ground velocity profile of the Bora wind

Autori
Lepri, Petra ; Kozmar, Hrvoje ; Večenaj, Željko ; Grisogono, Branko

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

Izvornik
Proceedings of the 2014 World Congress on Advances in Civil, Environmental and Materials Research / Choi, Chang-Koon - Daejeon : Techno Press, 2014, 78-78

Skup
The 2014 World Congress on Advances in Civil, Environmental, and Materials Research

Mjesto i datum
Busan, Koreja, 24.-28.08.2014

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bora wind; velocity profile; field measurements

Sažetak
While effects of the atmospheric boundary layer flow on engineering infrastructure are more or less known, some local transient winds create considerable difficulties to traffic and structures. An example is the gusty Bora wind blowing along the eastern Adriatic coast, and many other places around the world. As previous meteorological and geophysical studies laid grounds on the Bora’s large- and meso-scale motions, further work is required to fully determine Bora micro-scale characteristics in a form usable for engineers. In this study, the Bora vertical velocity profile is examined at the meteorological tower close to the city of Split, Croatia, by using 3-level high-frequency measurements. The experimental results agree well with the power-law and the logarithmic-law. An interesting feature is a decrease in the power-law exponent, friction velocity and aerodynamic surface roughness length with increasing Bora wind velocity. This indicates an urban-like velocity profile for smaller wind velocities and rural-like velocity profile for larger wind velocities. Similar trends are observed both during the day and night. Time averaging period does not show significant effects on the form of velocity profiles. Bora turbulence is predominantly generated mechanically due to an intense mixing, while the thermal effects are negligible, as the stratification of the atmospheric surface layer is near-neutral.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Strojarstvo



POVEZANOST RADA


Projekt / tema
05206-2
119-1193086-1311 - Bazične ORografske Atmosferske cirkulacije u Hrvatskoj (BORA) (Branko Grisogono, )
CATURBO (09/151)

Ustanove
Državni hidrometeorološki zavod,
Prirodoslovno-matematički fakultet, Zagreb,
Fakultet strojarstva i brodogradnje, Zagreb

Citiraj ovu publikaciju

Lepri, Petra; Kozmar, Hrvoje; Večenaj, Željko; Grisogono, Branko
A summertime near-ground velocity profile of the Bora wind // Proceedings of the 2014 World Congress on Advances in Civil, Environmental and Materials Research / Choi, Chang-Koon (ur.).
Daejeon: Techno Press, 2014. str. 78-78 (predavanje, međunarodna recenzija, sažetak, znanstveni)
Lepri, P., Kozmar, H., Večenaj, Ž. & Grisogono, B. (2014) A summertime near-ground velocity profile of the Bora wind. U: Choi, C. (ur.)Proceedings of the 2014 World Congress on Advances in Civil, Environmental and Materials Research.
@article{article, editor = {Choi, C.}, year = {2014}, pages = {78-78}, keywords = {Bora wind, velocity profile, field measurements}, title = {A summertime near-ground velocity profile of the Bora wind}, keyword = {Bora wind, velocity profile, field measurements}, publisher = {Techno Press}, publisherplace = {Busan, Koreja} }