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Gravity-Wave Drag in the Stable Boundary Layer Over Moderate Terrain
- Lapworth, A., Osborne, S. R.
- Boundary-layer meteorology 2019 v.171 no.2 pp. 175-189
- gravity, hills, landscapes, models, topography, troposphere, valleys
- Two previous studies of vertical stress profiles due to gravity waves in the stable boundary layer have given differing results. The current study uses a high-resolution numerical forecast model to determine the effect of moderate topography on the vertical stress profile due to gravity waves in the stable boundary layer. The results show that while a quadratic stress profile is expected when topography is low compared to the stable boundary-layer height, when topography height is moderate the pressure term in the valleys becomes dominant. This results in a linear effective stress profile below the hill tops with possibly some remnant stress transmitted up into the troposphere.