Download presentation
Presentation is loading. Please wait.
Published byKerrie Pierce Modified over 9 years ago
1
Section 5.4 Gravity Waves
2
Gravity Waves Gravity acts as the restoring force on parcels displaced from hydrostatic equilibrium. Pure gravity exists when the fluid is stably stratified. Two types of gravity waves: external gravity waves: static stability is due to the density discontinuity at the interface between two fluids internal gravity waves: static stability arises from the stable stratification, buoyancy force acts as the restoring force
3
External Gravity Waves: Density Discontinuity Air: Small Density h’ Water: Large Density
4
Gravity Waves can propagate along the thermocline Ocean Thermocline
5
Transverse Waves: Waves are oscillations (in field variables, such as velocity or pressure) that propagate in space.
6
Surface (External) Gravity Waves
7
Tsunami: Shallow Water Waves
8
Gravity Waves Gravity acts as the restoring force on parcels displaced from hydrostatic equilibrium. Pure gravity exists when the fluid is stably stratified. Two types of gravity waves: external gravity waves: static stability is due to the density discontinuity at the interface between two fluids internal gravity waves: static stability arises from the stable stratification, buoyancy force acts as the restoring force
9
Internal Gravity Waves: Stable Stratification Colder than the env.; Downward acc. Warmer than the env.; Upward acc.
10
Vertical Velocity (w) Field During a Model Initial Adjustment Periods
11
Internal Gravity Waves Generated by Rapidly Rising Deep Convection
12
Mountain Waves and Clouds
13
Lenticular Cloud
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.