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Transcript
What does the Atmosphere
do for us?
The atmosphere moderates temperatures
near the Earth's surface
⢠Contains the oxygen that humans require for
breathing.
⢠Sound requires a medium to travel through.
⢠Provides for a Hydrological cycle
⢠Atmospheric "Greenhouse Effect"
â Without the atmosphere, the average surface temperature of
the Earth would be about 0 °F
â Due to "Greenhouse Effect", the average surface
temperature is about 59 °F
⢠Reduces diurnal temperature swings -- without the
atmosphere, the days would be much hotter and the
nights much colder
â {Evaporation of water from surface} Ã {Condensation in clouds} Ã {Rain or snow}
⢠Shields the Earth from harmful ultraviolet
radiation
⢠Atmosphere moderates temperature near
Earthâs surface
â Mercuryâs daytime temperature is 700 °F
â Mercuryâs nighttime temperature is -300 °F
⢠Transports energy from the tropics to the poles
otherwise tropics would be much warmer, poles
much colder
9
Vertical Structure of Atmosphere
10
Thickness of the Atmosphere
⢠The atmosphere becomes
thinner with height
⢠There is no easy way to
establish the âtopâ of the
Earthâs atmosphere
11
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