## Abstract Three kinds of flow over unlevel ground are defined according to their scale ‐ aerodynamic, barostromatic, and geostrophic flow ‐ and it is seen that the practical difficulties in the way of obtaining the correct value of the relevant non‐dimensional numbers in model experiments are alm
Airflow over mountains: The lee-wave amplitude
✍ Scribed by G. A. Corby; C. E. Wallington
- Publisher
- John Wiley and Sons
- Year
- 1956
- Tongue
- English
- Weight
- 485 KB
- Volume
- 82
- Category
- Article
- ISSN
- 0035-9009
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Although orographic lee waves are probably common over the British Isles, their amplitude is so critically dependent on airstream characteristics and on the scale of local topography that they are likely to be insignificant unless a variety of conditions is satisfied. Precise criteria for large‐amplitude waves cannot be formulated for airstreams in general, but simplification of the general problem illustrates the pronounced effect of mountain size and shape, stability and wind speed on the lee‐wave amplitude.
📜 SIMILAR VOLUMES
## Abstract Separation of flow may be two‐dimensional when the wake or eddy is closed, or three‐dimensional when the air is continuously replaced. It often occurs at a salient edge. When it occurs the effect of the mountain on the high‐level flow is reduced. If the airflow is temporarily induced to
## Abstract The disturbance in an air current, whose velocity may vary with height, caused by irregularities in the ground, is obtained. For a wave‐like corrugation of the ground of wavelength 2π/k, small enough for the earth's rotation to be neglected, the stream function of the disturbance satisf
## Abstract Wavelengths and variation of wave amplitude with height are computed for 19 airstreams in which lee waves have been observed. Comparison between the computed and observed wavelengths suggests that the tropospheric flow is sufficiently independent of conditions in the stratosphere to all
## Abstract A numerical study of the effect of mountain shape on two‐dimensional lee‐wave flow shows that asymmetrical ridges are slightly more favourable than symmetrical profiles for the formation of lee waves, especially for short wavelengths. A technique is suggested for determining the lee wav