Transcript Local Winds vs Global Winds - Mr. Dalton

LOCAL WINDS VS
GLOBAL WINDS
WHAT DIRECTION DOES WEATHER
MOVE ACROSS NORTH AMERICA?
West to East!
WHICH GLOBAL WINDS ARE RESPONSIBLE FOR THE
MOVEMENT OF WEATHER ACROSS NORTHERN
AMERICA?
Westerlies
LOCAL WINDS
Winds that blow over short distances caused
by unequal heating of small areas on the
earth’s surface.
WHAT’S THE DIFFERENCE BETWEEN GLOBAL AND
LOCAL WINDS?
Global wind systems determine the major weather
patterns for the entire planet.
Local Wind systems affect local weather only.
1. SEA BREEZE
Caused by unequal heating rates of land and
water
During the day, the land heats up faster causing
warm air to rise.
The cooler air over the sea moves to land.
Sea to Land
2. LAND BREEZE
Caused by unequal heating rates of land and
water.
During the night, the water cools slower
The warmer air over the water rises.
Cooler air over the land moves to sea.
Land to Sea
3. JET STREAM
A narrow belt of strong wind that blow near the top of
the troposphere.
Forms at the boundary of cold, dry polar air near the
north and warmer moist air from the south.
JET STREAM
They move West to East @ 200 to 400 km/hr
Pilots fly in the jet stream to save time and fuel.
Helps move storms across the country.