Chapter 24.3 Solar Energy and Wind
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Transcript Chapter 24.3 Solar Energy and Wind
Chapter 24.3
Solar Energy and
Winds
Solar Energy
When solar energy reaches the
atmosphere:
Reflected back – 30%
Absorbed by atmosphere-20%
Absorbed by earth – 50%
Greenhouse Effect
Energy reflected by
the earth’s surface is
trapped by water vapor
and carbon dioxide.
How is Energy Transferred
Within the Troposphere?
Radiation – land and water
radiate heat back into the
atmosphere.
Conduction – heats air in direct
contact with the land and water
Convection – Currents form
when hot air rises and cooler air
sinks
Wind
Caused by differences
in air pressure.
Air flows from area of
high pressure to area
of low pressure.
Local Winds
Wind that blows over a short
distance.
Daytime-Sea breeze-cool air
from water flows toward land
Night time-Land breeze-cooler
air over land moves toward
water.
Global Winds
Winds that blow over
long distances.
Convection cells –
circulating air patterns.
Global Winds
Trade winds
Westerlies
Polar easterlies
Coriolis Effect
Causes global winds to
curve because of the
rotation of the earth.
Jet Stream
A belt of high
altitude wind in the
upper troposphere.