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

https://hrcak.srce.hr/47783

Publication date:

31.12.2009.

Article data in other languages: croatian

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