Altitude

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  • Created by: OctaviaL
  • Created on: 30-05-16 12:00
As height above sea level increases what happens to temperature?
Decreases.
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What is the Environmental Lapse Rate (ELR)?
The change of temperature with height in the atmosphere.
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What is the average value for the ELR?
6.5 C decrease for every 1000m.
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What is the Dry Adiabatic Lapse Rate (DALR)?
The change of temperature when air is dry i.e has not become saturated by cooling to it's dewpoint so relative humidity < 100%.
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What is the value for the DALR?
1 C per 100m.
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What is the Saturated Adiabatic Lapse Rate (SALR)?
The temperature change once air is saturated.
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What is the value for the SALR?
0.5 C per 100m.
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Why is the SALR lower than the DALR?
When air reaches 100% humidity condensation releases latent heat.
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Why are higher altitudes colder?
Earth's surface heats the atmosphere through conduction so temperature is greatest towards the heat source and decreases away from it.
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What affect does air pressure have on temperature?
Air pressure decreases with temperature. There are fewer air molecules and the move more slowly so create less heat which means lower temperatures.
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Other cards in this set

Card 2

Front

What is the Environmental Lapse Rate (ELR)?

Back

The change of temperature with height in the atmosphere.

Card 3

Front

What is the average value for the ELR?

Back

Preview of the front of card 3

Card 4

Front

What is the Dry Adiabatic Lapse Rate (DALR)?

Back

Preview of the front of card 4

Card 5

Front

What is the value for the DALR?

Back

Preview of the front of card 5
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