greenhouse effect is a process by which thermal radiation from a
planetary surface is absorbed by atmospheric greenhouse gases, and is
re-radiated in all directions. Since part of this re-radiation is back
towards the surface, energy is transferred to the surface and the lower
atmosphere. As a result, the temperature there is higher than it would
be if direct heating by solar radiation were the only warming mechanism.
ABOUT THE GREENHOUSE EFFECT:
• The greenhouse
effect refers to circumstances where the short wavelengths of visible
light from the sun pass through a transparent medium and are absorbed,
but the longer wavelengths of the infrared re-radiation from the heated
objects are unable to pass through that medium.
• The trapping of the long wavelength radiation leads
to more heating and a higher resultant temperature.
• Besides the
heating of an automobile by sunlight through the windshield and the
namesake example of heating the greenhouse by sunlight passing through
sealed, transparent windows, the greenhouse effect has been widely used
to describe the trapping of excess heat by the rising concentration of
carbon dioxide in the atmosphere.
• The carbon dioxide strongly absorbs infrared and
does not allow as much of it to escape into space.
• it's a crucial and positive part of Earth's energy
• It's what
allows Earth to stay warm enough for life to survive. Without it, Earth
would feel something like Mars.
• The process gets its name from the greenhouses that
stay nice and warm for growing plants.
• Earth's greenhouse effect keeps the planet much
warmer than surrounding space.
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Provided by Judy Tangata.