Heat Exchange Process Flashcards
What types of radiation does solar radiation include?
- Infrared and Near-Infrared
- Visible Light
- Ultra-Violet
How much of solar radiation is absorbed by the earth’s surface? What occurs to the rest?
- 46%
- Absorption by gases and particles in the atmosphere
- Reflection by clouds
- Scattering by dust and gases
What is the circulation model?
Rising of warming air and lowering of cooling air.
What is conduction?
- The process of heat transfer by direct contact
- Air is not a very good conductor
What is convection?
Body of air is heated and rises
What is the difference between latent heat transfer and sensible heat transfer?
- Latent heat transfer is the energy absorbed or released from a substance during a phase change
- Sensible heat transfer is the energy required to change the temperature of a substance with no phase change
What causes a radiation inversion?
- Tend to form on clear nights with calm or light winds and are most noticeable around sunrise.
- Long wave radiation causes the air near the surface to become cooler than the atmosphere above.
What is a frontal inversion?
Cold air mass merges with a warm air mass and the warm air mass is forced to rise up over the top of it, creating the inversion.
What is a subsidence inversion?
- Forms with high pressure systems.
- High will force air to descend, adiabatic warming will take place, forming a layer of air warmer than that below.
What is a turbulence inversion?
- When winds below subsidence inversion decouple from winds above inversion.
- Results in a cycling of air with air from above warming as it drops and air moving up cooling in a cycle.
What inversion produces drizzle?
TURBULENCE INVERSION/SUBSIDENCE INVERSION
What are some major effects of inversions?
- Cloud Formation
- Visibility
- Turbulence
- Wind Shear
- Performance
