Download WEATHER FACTORS Chapter 2 Section 3 WIND – 47 Horizontal

WEATHER FACTORS
Chapter 2 Section 3
WIND – 47
 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