Heat, motion and waves Flashcards
What are the three ways to lose heat?
- Longwave radiation heat loss
- Latent heat loss
- Sensible heat loss
What part of the ocean is warmer?
The top
Types of heat flux in the ocean
- influx
- evaporation
- heat radiation
- conduction
Temperature changes…
density
What is buoyancy?
The tendency of an object to rise or float in a fluid or gas
What is the buoyancy of an object proportional to?
The difference of the density of the object and the density of a liquid
Changes in water density
When the water loses heat, the previously warm water at the top will sink back down until it floats again, this is due to the change in density
Salinity affecting density
The salt is pushed out of water as it turns to ice, this causes the water below to increase in salinity, this is convection
What is viscosity?
The friction between water molecules
What does the viscosity tell you?
How far down the wind can impact the ocean
What are the different types of wave?
- internal waves
- gravity waves
- surface waves
Explain gravity waves
There has to be a disturbing force, it is all about the buoyancy and the forces
Explain surface waves
Wind blows along the surface, due to friction and viscosity the water particles are accelerated and little waves formed.
Explain internal waves
In between the density change in the ocean there is a boundary, this allows waves to form.
The density change is so small so the forces are small
Less friction means the waves overshoot a lot
