Airflow over a two-dimensional escarpment. III: Nonhydrostatic flow
Blockley, J.A. and Lyons, T.J. (1994) Airflow over a two-dimensional escarpment. III: Nonhydrostatic flow. Quarterly Journal of the Royal Meteorological Society, 120 (515). pp. 79-109.
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Forced flow over the asymmetric topography of the Darling Scarp, Western Australia is modelled, using a nonhydrostatic model, and compared with observations. Drag histories and sensitivity tests indicate that it is possible for the flow to be dominated by hydrostatic downslope windstorms even if the hydrostatic index indicates nonhydrostatic dominance. Experiments on a wide range of one- or two-layered flows suggest that nonhydrostatic effects on windstorm events are very small. However, the development and location of trapped lee waves can be significantly affected if there is sufficient hydrostatic forcing in the flow. For hydrostatic forcing to dominate over trapped lee waves it is necessary for reflection, from a region of wave breaking or a critical layer, to occur at the right height.
|Publication Type:||Journal Article|
|Murdoch Affiliation:||School of Biological and Environmental Sciences|
|Publisher:||Royal Meteorological Society|
|Copyright:||(c) Royal Meteorological Society|
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