The Greenhouse Effect
- Created by: Jadii
- Created on: 13-03-14 20:42
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- The Greenhouse Effect
- Surface of the Sun = 6000K
- Earth's average surface temp = 285K
- Some infrared radiation is re-emitted by molecules - but it happens in all directions
- adsorption of infrared radiation increases the vibrational energy of the methane molecules and the bonds vibrate more vigorously
- This vibrational energy can be transferred to other molecules in the air like N2 and O2 by collisions
- This increases their kinetic energy - raising the temp of the air.
- This vibrational energy can be transferred to other molecules in the air like N2 and O2 by collisions
- Methane is formed through living organisms
- Some infrared radiation is re-emitted by molecules - but it happens in all directions
- An example of a greenhouse gas
- Digestive tracts of animals
- the vast stretches of tundra in Arctic regions when the ice melts and the ground becomes waterlogged
- Rice paddy fields, where water and mud cut off air from rotting vegetation
- Marshes, compost heaps and landfill sites where vegetation rots without air
- adsorption of infrared radiation increases the vibrational energy of the methane molecules and the bonds vibrate more vigorously
- This vibrational energy can be transferred to other molecules in the air like N2 and O2 by collisions
- This increases their kinetic energy - raising the temp of the air.
- This vibrational energy can be transferred to other molecules in the air like N2 and O2 by collisions
- Carbon dioxide and several other gases in the troposphere absorb infrared radiation
- They let the Sun's visible radiation in, but they stop some of the Earth's infrared radiation getting out - they contribute to the greenhouse effect
- Global Warming Potential
- Depends on the absorption efficiency of the gas and its atmospheric lifetime
- Greenhouse effect helps keep the average temp on the Earth to support life
- We need the atmosphere so the Earth does not become like the Moon - barren and lifeless
- The composition of our atmosphere is similar to Venus, with 97% CO2, but there would be no life because it would be so hot
- Mars is cold on the other hand because its atmosphere is very thin
- We are so used to our stable and comfortable temp that even a small has dramatic effects on life
- Methane is formed through living organisms
- An example of a greenhouse gas
- Digestive tracts of animals
- the vast stretches of tundra in Arctic regions when the ice melts and the ground becomes waterlogged
- Rice paddy fields, where water and mud cut off air from rotting vegetation
- Marshes, compost heaps and landfill sites where vegetation rots without air
- Carbon dioxide and several other gases in the troposphere absorb infrared radiation
- They let the Sun's visible radiation in, but they stop some of the Earth's infrared radiation getting out - they contribute to the greenhouse effect
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