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A case study of severe bora event at Vratnik Pass and Senj, NE Adriatic coast (CROSBI ID 573055)

Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija

Večenaj, Željko ; Belušić, Danijel ; Grisogono, Branko A case study of severe bora event at Vratnik Pass and Senj, NE Adriatic coast. 2011

Podaci o odgovornosti

Večenaj, Željko ; Belušić, Danijel ; Grisogono, Branko

engleski

A case study of severe bora event at Vratnik Pass and Senj, NE Adriatic coast

Bora is a downslope windstorm that blows at the eastern Adriatic coast from the northeast quadrant, most often during winter seasons. It possesses a wide spectrum of average wind speeds, and due to its gustiness the speed maxima may surpass 60 m/s. During a bora event, the turbulence is strongly developed in the lee of the mountain. Horizontal and vertical wind is measured at Vratnik Pass (44.98°N, 14.98°E, 600 m above MSL) at a height of 10 m above the ground, and down the slope, in the town of Senj (44.99°N, 14.90°E, 2 m above MSL) at a height of 13 m above the ground with the WindMaster ultrasonic anemometer (Gill Instruments). The anemometers simultaneously record the data in the period between October 2004 and September 2005 with a sampling frequency of 4 Hz. A case study is presented when bora occurred both at Vratnik Pass and Senj, former being the upwind elevated site for the later and well-known bora place. We address onset, evolution and cessation of bora at these two closely related places. Besides a dynamical background, certain turbulence features of this bora event are assessed as well. Intriguing bora-flow related subtleties between the two representative sites are revealed. Regarding the both sites, different sub-regimes are indicated.

Bora; Ultrasonic anemometer; turbulence; turbulent kinetic energy

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Podaci o prilogu

2011.

objavljeno

Podaci o matičnoj publikaciji

Podaci o skupu

31st International Conference on Alpine Meteorology

poster

23.05.2011-27.05.2011

Aviemore, Ujedinjeno Kraljevstvo

Povezanost rada

Geologija