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Linear criteria for gravity-wave breaking in resonant stratified flow over a ridge

Teixeira, M. A. C. and Miranda, P. M. A. (2005) Linear criteria for gravity-wave breaking in resonant stratified flow over a ridge. Quarterly Journal of the Royal Meteorological Society, 131 (609). pp. 1815-1820. ISSN 1477-870X

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To link to this item DOI: 10.1256/qj.04.155


Using linear theory, it is shown that, in resonant flow over a 2D mountain ridge, such as exists when a layer of uniform wind is topped by an environmental critical level, the conditions for internal gravity-wave breaking are different from those determined in previous studies for non-resonant flows. For Richardson numbers in the shear layer not exceeding 2.25, two zones of flow overturning exist, respectively below and downstream and above and upstream of the expected locations. Flow overturning occurs for values of the dimensionless height of the ridge smaller than those required for a uniform wind profile. These results may have implications for the physical understanding of high-drag states.

Item Type:Article
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
No Reading authors. Back catalogue items
ID Code:29250
Publisher:Royal Meteorological Society


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