Naslov
Spatial characteristics of extreme bora events

Autori
Grižić, Jelena ; Večenaj, Željko ; Kozmar, Hrvoje ; Grisogono, Branko

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

Izvornik
International Conference on Innovative Technologies IN-TECH 2017 / - Ljubljana, 2017, 1-4

Skup
International Conference on Innovative Technologies IN-TECH 2017

Mjesto i datum
Ljubljana, Slovenija, 13.09.2017. - 15.09.2017

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Bora ; field measurements ; complex terrain ; velocity power spectra ; turbulence intensity

Sažetak
Bora is a severe downslope wind that blows at the Eastern Adriatic Coast. Its main characteristics are average wind speed velocities smaller than 20m/s and strong gusts that exceed 60m/s. These gusts cause difficulties in traffic and everyday life, while they have a strong impact on engineering infrastructure as well. Over the last two decades, extensive 3D high-frequency measurements have been carried out at various locations along the Croatian Coast (Senj, Vratnik Pass, Pometeno brdo and Maslenica Bridge) to study bora wind characteristics. From all collected data on each location, extreme March bora events were extracted. Basic statistical properties of these bora events show differences in mean and maximal streamwise wind velocities and also mean power spectra and turbulence intensity for all three wind components. Mean and maximal streamwise component velocities are highest at Maslenica. At Senj, there are lower mean but higher maximal speeds. Mean values are similar for Vratnik and Dugopolje, while Dugopolje has higher maximal values then Vratnik. Power spectrum and turbulence intensity are higher for locations with lower elevation (Senj and Maslenica) indicating stronger turbulence as bora reaches the coastal line. Overall turbulence energy is the highest in Senj.

Izvorni jezik
Engleski

Znanstvena područja
Fizika, Građevinarstvo, Strojarstvo

POVEZANOST RADA