Geofizika, Vol. 26 No. 2, 2009.
Short communication, Note
Formation of reversed lee flow over the north-eastern Adriatic during bora
Maja Telišman Prtenjak
orcid.org/0000-0002-8240-1793
; Department of Geophysics, Faculty of Science, University of Zagreb, Croatia
Danijel Belušić
; Department of Geophysics, Faculty of Science, University of Zagreb, Croatia
Abstract
In-situ measurements indicate the existence of reversed near-surface airflow over the north-eastern Adriatic during the bora wind. Here we examine its structure and evolution by means of a numerical simulation. The studied phenomenon developed during typical summer frontal bora that is associated with a cold air advection from the north-east. It is characterized by a sudden increase in wind speed and a brief duration. Within a sheltered area near the town of Malinska on the island of Krk, onshore flow occurred as the bottom branch of the lee rotor-like circulation that was associated with the hydraulic jump. While the closed circulation somewhat resembles the hypothesized hydraulic-jump rotor, there are significant differences, particularly in the strength of the turbulence associated with the rotor formation.
Keywords
wake; hydraulic jump; lee rotor
Hrčak ID:
47783
URI
Publication date:
31.12.2009.
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