First page Back Continue Last page Overview Graphics
Types of periodicity
- Stable: no wave; laminar flow, eddies damp out
- Shear wave: periodicity due to difference of wind speed across a boundary (of density, humidity, temperature, velocity)
- Thermal wave (streeting)
- Strongly affected by wind velocity and instability.
- Convection wave: periodicity enhanced by thermal penetration from lower layer to upper
- Strongly affected by instability of lower and stability of upper layer.
- Convective wave vs convective rolls
- Convective roll = “morning glory” in Australia, post-coldfront rows