Transcript Document

Air Masses: A large body of
air with the same temperature
and moisture throughout.
 Air formed over warm water
is warm and moist.
 Air formed over land in
north is cold and dry.
Four different surface conditions that form air
masses.
 Air over land = Dry
 Air over water = Moist
 Air near poles = Cold
 Air near equator = Warm
 High & Low Pressure Systems
 High pressure systems bring
clear, skies, dry weather and
gentle winds. COLD AIR
 Low pressure systems bring
cloudy, wet weather, with strong
gusty winds. WARM AIR
Fronts: When one air mass
comes in contact with
another, the boundary
between them is called a
front. Often producing
clouds, strong winds, and
precipitation.
TYPES OF FRONTS:
 Cold Front : cold air mass pushes
under a warm air mass. Bring
heavy rain, gusty winds, and cooler
temperatures.
Warm Front: warm air mass
pushes under cold air mass. Bring
light rain lasting a few days and
warmer temperatures.
Stationary Front.
When a warm or cold front stops
moving. These type of conditions can
last for days. Temperatures remain
stagnant and winds are gentle to nil.
Occluded Front: the cold front
over takes the warm front. The
weather is not as extreme
Forecasting An attempt to
predict future weather.
 Decrease in air pressure = stormy
weather. While increase in air
pressure = fair weather.
Increase in clouds front is coming.
Weather: Consist of Atmosphere, Temperature,
Humidity, Precipitation, Wind, and Cloud Cover
Atmosphere: Consist of the gas part of earth
Troposphere: Layer of atmosphere that we live in
an most weather takes place in.
Stratosphere: increase in temp. with increase in
altitude red color.
Mesosphere: decrease in temp. with increase in
altitude.
Thermosphere: Outer most layer of atmosphere
Temperature: Amount of heat in the air
Air Pressure: Measured with barometer, as
temperature increases air pressure decreases
Humidity: is the amount of water vapor in
the air
Wind: Movement of air. Measured with a
hygrometer.
Precipitation: any form of water that falls to
earth (rain, sleet, snow, hail)
Climate: Average weather of an area over
a period of time.
Latitude: distance from equator.
Altitude: height above sea level. Cooler
temperatures at higher altitudes then
lower.
Latent Heat: Hidden heat. Water has a
high latent heat that is why areas near
large bodies of water have cooler
summers and warmer winters.
Air Masses: A large body of air with the
same temperature and moisture
throughout.
Continental: Air formed over continents is
dry
Maritime: Air formed over water is wet
Fronts: When one air mass comes in
contact with another air mass
Cold Front: cold air mass pushes under
a warm air mass. Bring heavy rain, gusty
winds, and cooler temperatures.
Warm Front: warm air mass pushes
under cold air mass. Bring light rain
lasting a few days and warmer
temperatures.