Flashcards
Atmosphere
Cards in this deck (18)
- 1Conduction definitionHeat is transferred through contact
- 2Radiation definitionTransfer of heat via electromagnetic radiation
E.g. Radiation from the sun provides thermal input into the atmosphere - 3Convection definitionHot fluid rises
Drives the vertical motioni n the atmosphere - 4Structure of the atmosphere (low to high altitudes)Troposphere
Tropopause
Stratosphere
Stratopause
Mesosphere
Mesopause
Thermosphere - 5What does the Ionosphere consist of?Stratopause, mesosphere, mesopause and thermosphere
- 6Describe the Troposphere-Between 0-15km
-Weather region
-75% mass of the atmosphere
-Atmospheric water
-Temperature and pressure decrease with height - 7Describe the Tropopause-Boundary layer between troposphere and stratosphere
-Constant temperature
-Height increases over time and is higher at the equator than at the poles - 8Describe the stratosphere-up to 50km
-Temperature increases with height (-55 to 0degrees C)
-Clouds of ice and nitric acid form at poles - 9What is the ozone layer?-Formed by UV splitting O2
-Can absorb UV - 10How was the hole in the Ozone created?CFCs released into the atmosphere and were broken down by sunlight. Products destroy ozone.
- 11Describe the stratopause-Boundary between the stratosphere and the mesosphere
-Region with the maximum temperature (-15-0degrees C)
-Pressure 1mb
-Height about 50km - 12Describe the mesosphere-50 to 80km high
-Temperature drops with height
-Ice clouds form - 13Describe the mesopause-Boundary between the mesosphere and the thermosphere
-Coldest region
-Temperature varies with season and latitude - 14Describe the thermosphere-Outer layer of atmosphere
-Above 80km
-Very low density
-Temperatures up to 1500degreesC depending on solar activity - 15Describe the Exosphere-Top part of the mesosphere plus the thermosphere
-atmosphere very thin
-satellites orbit in this region due to the lack of drag - 16What is Lapse Rate?In the troposphere temperature decreases linearly with height. Lapse rate is the rate of temperature fall with height.
- 17How do you calculate Lapse Rate?1. Calculate the density of air in terms of pressure and temperature.
2. Calculate the variation of pressure with height.
3. Calculate variation of temperature with pressure.
4. Combine 2 & 3 to give the dry adiabatic lapse rate. - 18What is the Ideal Gas Law?FOR A FIXED MASS OF GAS
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- Earth as a Planetary System Flashcards on Atmosphere, created by Briony Leary on 24/08/2017.
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- Briony Leary
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