QUASI-GEOSTROPHIC FLOW PAST MOUNTAINS

Abstract: Blocked flow at moderate Rossby numbers is studied and an analytic expression is derived for the vertical velocities on each side of the wake: W = (Uo h) / (f Lx Ly) Where Uo is the incoming wind speed, h is the mountain height, f is Coriolis parameter, Ly is mountain half-width and Ly is...

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Bibliographic Details
Main Author: Ólafsson, Haraldur; Háskóli Íslands (University of Iceland), Veðurstofa Íslands (Icelandic Meteorological Office) and Rannsóknastofa í veðurfræði (Institute for Meteorological Research); haraldur@vedur.is
Format: Text
Language:English
Published: Croatian meteorological society; info@meteohmd.hr 2005
Subjects:
quasi-geostrophic flow;Rossby number;Froude number;Nh/U;non-dimensional mountain height;asymetric ascending motion;Iceland
Coriolis force;blocking;conceptual model;wake;corner winds
Iceland
Online Access:http://hrcak.srce.hr/64697
http://hrcak.srce.hr/file/96969
Description
Summary:Abstract: Blocked flow at moderate Rossby numbers is studied and an analytic expression is derived for the vertical velocities on each side of the wake: W = (Uo h) / (f Lx Ly) Where Uo is the incoming wind speed, h is the mountain height, f is Coriolis parameter, Ly is mountain half-width and Ly is a length scale of the vertical mortion downstream of the edges of the mountains. To illustrate the use of the above expression, a collection of flows over Iceland is presented and the calculated vertical velocities are compared to the number of days with precipitation in two different regions.

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