We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Misalignment between the propagation direction of the bora wind and its pulsations.
- Authors
Golem, Petar; Večenaj, Željko; Kozmar, Hrvoje; Grisogono, Branko
- Abstract
The bora is a well‐known downslope windstorm that blows at the eastern coast of the Adriatic Sea from inland towards the sea, mainly from the northeasterly direction. One of the notable bora characteristics is the quasi‐periodic gust pulsations. We address their characteristics during strong to severe bora events by applying rotational spectral analysis on 9 months of continuous high‐frequency sonic anemometer measurements in the town of Senj, Croatia. The analysis shows that the orientation of the pulsations' plane of oscillation does not correspond to the measured near‐ground wind direction. In particular, these two directions seem to be negatively correlated. Although the structure of the pulsations is mostly rectilinear, the positive rotational component was larger than the negative one in all except one bora event. The coincidence of the wind shear direction within the lee‐side jet with the orientation of the plane of oscillation leads to a tentative conclusion that its orientation was governed by the Kelvin–Helmholtz instability, at least in the cases presented.
- Subjects
CROATIA; KELVIN-Helmholtz instability; HELMHOLTZ, Hermann von, 1821-1894; WIND shear; JET planes; WINDSTORMS; SEVERE storms; OSCILLATIONS
- Publication
Quarterly Journal of the Royal Meteorological Society, 2024, Vol 150, Issue 759, p1194
- ISSN
0035-9009
- Publication type
Article
- DOI
10.1002/qj.4679