Download CHAPTER 2 WEATHER FACTORS REVIEW SECTION 3 WIND – 47

CHAPTER 2 WEATHER FACTORS REVIEW SECTION 3
WIND
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Horizontal movement of air from an area of high pressure to an area of low pressure
Caused by differenced in air pressure
Wind speed is measured by an anemometer
LOCAL WINDS – 48
 Winds that blow over a short distance
 Caused by the unequal heating of Earth’s surface within a small area
SEA BREEZE
 Local wind that blows from an ocean or lake
 The air over the land becomes warmer than the air over water.
 The warm air expands and rises, creating a low-pressure area.
 Cool air blows inland from over the water and moves underneath the warm air
LAND BREEZE
 At night
 Land cools more quickly than water, so the air over the land becomes cooler than air over the
water.
 As warmer air over the water expands and rises, cooler air from the land moves beneath it
 The flow of air from land to a body of water is called a land breeze
GLOBAL WINDS
 Winds that blow steady from specific directions over long distances
 Created by the unequal heating of Earth’s surface
 Global winds occur over large areas
CORIOLIS EFFECT
 The way Earth’s rotation makes winds curve
 Global winds in Northern Hemisphere gradually turn toward the right
 Global winds in Southern Hemisphere curve toward the left
MAJOR GLOBAL WIND BELTS
 Trade winds
 Polar easterlies
 Prevailing westerlies
DOLDRUMS
 Regions near the equator with little or no wind