Weather ReviewAtmosphere in Motion

Winds blow from _____ pressure to _______ pressure.

Winds blow from High pressure to Low pressure.

They also blow from COLD to WARM air

How would you describe the winds in the NE section of the US?

How would you describe the winds in the NE section of the US? HIGH

WHY?

How would you describe the winds in the NE section of the US? HIGH

WHY?Isobars are veryclose togetherindicating largechange in pressure

Remembering that winds are named by the direction from which they come, which one of these is a land breeze?A

B

Remembering that winds are named by the direction from which they come, which one of these is a land breeze?

B is a land breeze. Explain why.

A

B

Remembering that winds are named by the direction from which they come, which one of these is a land breeze?

B is a land breeze. Because the land cools off very quickly at night, while the ocean temperature stays basically the same. Since Winds blow from cool to warm, the breeze at night comes from the land.

A

B

Remembering that winds are named by the direction from which they come, which one of these is a land breeze?

A is a sea breeze. During the day, the land heats up much more quickly than the water, and therefore, since wind blows from cool to warm, the breeze comes from the water.

A

B

Air movement

•Put: conduction, convection and radiation in order of how air masses are formed. (Describe a convection current)

•Put: conduction, convection and radiation in order of how air masses are formed. (Describe a convection current)

Radiation – heats up the land

Conduction – heats up the air

Convection – moves the warmair around

Draw a cold front and describe the associated weather

Draw a cold front and describe the associated weather

Cooler temps, rain, storms

Cold dry air collides with warm moist air

Draw a warm front

Draw a warm frontWarm air rises up and over the cooler more dense air

List the four terms associated with describing air masses

List the four terms associated with describing air masses

Maritime – moistContinental – dryPolar – cool/coldTropical – warm/hot

Name the air mass that would form over the Gulf of Mexico

Name the air mass that would form over the Gulf of Mexico

Maritime Tropical = warm and moist

Explain why coastal climates are cooler in the summer and warmer in the winter

Water does not heat up or cool down as fast as land, so the sea breezes near the coastal areas keep those temperatures more moderate (average)

What causes hurricanes to form?

Hurricanes start as tropical storms near the tip of Africa. They travel across the Atlantic Ocean picking up LOTS of warm moist air – which causes EXTREMELY LOW PRESSURE on the surface.

EQUIPMENT USED FOR FORECASTING

thermometer

barometer

Anemometer(wind speed)

Psychrometer(humidity)

Describe the formation and results of Low pressure

Describe the formation and results of Low pressure • Low pressure is formed as warm air rises, leaving less air molecules at

the surface. • As the warm air rises, it cools, condenses and forms clouds.• Resulting weather is usually warmer and cloudy

Describe the formation and results of High pressure

Describe the formation and results of High pressure Cool, dense air aloft sinks,

pushing air molecules towardThe surface. With the added pressure, cloudsare unable to form, so clear skies prevail.

WINDY

CLEAR

RAINYCOLD FRONT

dir

ect

ion

MARITIME TROPICAL

CONTINENTAL POLAR