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Non-hydrostatic effects on mountain wave breaking in directional shear flows

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Guarino, M.-V. and Teixeira, M. A. C. (2017) Non-hydrostatic effects on mountain wave breaking in directional shear flows. Quarterly Journal of the Royal Meteorological Society, 143 (709). pp. 3291-3297. ISSN 1477-870X

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To link to this item DOI: 10.1002/qj.3157

Abstract/Summary

Mountain waves excited by narrow 3D orography are investigated using idealized numerical simulations of atmospheric flows with directional wind shear. The stability of these waves is compared with the stability of hydrostatic mountain waves. The focus is on understanding how wave breaking is modified via gravity wave-critical level interaction, when non-hydrostatic (dispersive) effects arise. The influence of nonhydrostatic effects on wave breaking appears to be a function of the intensity of the background shear, increasing the stability of the flow (inhibiting wave breaking) for weak wind shear, but decreasing it instead (enhancing wave breaking) for stronger wind shear.

Item Type:Article
Refereed:Yes
Divisions:Science > School of Mathematical, Physical and Computational Sciences > Department of Meteorology
ID Code:72365
Uncontrolled Keywords:Mountain waves, Non-hydrostatic effects, Wave breaking, 3D mountains, Directional shear
Publisher:Royal Meteorological Society
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