Download Weather and Climate part 2

Weather and Climate
part 2
Tools to Measure Weather:
Thermometer:
A liquid-filled tube used to measure air
temperature.
Temperature @ BainPop
Weather and Climate
part 2
Tools to Measure Weather:
Anemometer: An instrument that measures wind
speed with small cups that spin in the wind.
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Wind Vane and Wind Socks: Show wind
direction.
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Barometer: Measures air pressure.
A spring inside can squeeze or relax as air
pressure increases or decreases
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Weather and Climate
part 2
Air Mass:
A huge body of air with similar air temperature and
humidity throughout.
Front:
Boundaries where warm and cool air masses
meet.
Weather Fronts
Air Mass
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A large body of
air with similar
temperature
and moisture.
Air masses
form over large
land or water
masses.
MAP TAP 2002-2003
Weather Fronts
5
Frontal Boundaries
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Where air masses
interact – also know
as a front.
4 kinds of fronts:
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–
–
–
Cold front
Warm front
Occluded front
Stationary front
MAP TAP 2002-2003
Weather Fronts
6
Cold Front
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A cold air mass
is replacing a
warmer air
mass.
Shown on a
weather map by
a blue line with
triangles
pointing the
direction the
cool air is
moving.
Back to
activity
Warm Front
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●
Back to
activity
Warm air mass
replacing a
cooler air mass.
Shown on a
weather map by
a red line with
half circles
pointing the
direction the
warm air is
moving.
MAP TAP 2002-2003
Weather Fronts
8
Comparing Warm and Cold Fronts
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Cold fronts move faster than warm fronts.
The weather activity in a cold front is often violent and
happens directly at the front.
Cold fronts have sudden gusty winds high in the air
creating turbulence.
The weather activity in a warm front generally happens
before the front passes.
In a warm front the cloud formation is very low often
creating situations of poor visibility.
MAP TAP 2002-2003
Weather Fronts
9
Occluded Fronts
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When a warm front
is trapped by 2 cold
fronts.
Shown on a
weather map by a
purple line with
alternating triangles
and semicircles
pointing the
direction the front is
moving.
MAP TAP 2002-2003
Back to
activity
Weather Fronts
10
Stationary Fronts
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Back to
activity
A front that stops moving or is moving very slowly.
Shown on a weather map with alternating red
semicircles pointing away from the warm air and blue
triangles pointing away from the cold air.
MAP TAP 2002-2003
Locate the 4 types of fronts on this
weather map.
Hint
1
Hint
2
Hint
3
Hint
4
Cold Fronts
Warm Front
Stationary Front
Occluded Front
Be a Weather Forecaster
You are planning
to travel to
Alabama in 2
days. The high
temperature there
for today is 68º F.
Use the map to help you predict whether the temperature in Alabama
will increase, decrease, or stay the same. Explain why you think so.
Weather Fronts
17
Be a Weather Forecaster
There is a cold front approaching. The
temperatures will probably be cooler behind
the front.
18
Be a Weather Forecaster
●
MAP TAP 2002-2003
Of course, meteorologists (weather
forecasters) use much more data
than fronts and air masses to help
them forecast the weather more
accurately. But any forecast is just
a prediction of what might happen.
Even with the best data, weather
forecasts can be wrong.
Weather Fronts
19
Weather and Climate
part 2
Cold Front:
Develops when a cold air mass moves into a
warm air mass.
Cold Fronts often bring brief, strong storms
followed by cooler, drier weather.
Weather and Climate
part 2
Warm Front:
Develops when a warm air mass moves into a
cold air mass.
Warm fronts tend to bring steady, light
precipitation followed by warmer, more humid
weather.
Weather and Climate
part 2
So, what occurs where air masses with
different temperatures meet?
Weather and Climate
part 2
So, what occurs where air masses with
different temperatures meet?
Precipitation!
Weather and Climate
part 2
Climate:
The average weather pattern in an area over
many years.
Climate @ BrainPop
Weather and Climate
part 2
How can a mountain range impact an area's
climate?
Weather and Climate
part 2
How can a mountain range impact an area's
climate?
Often one side of a mountain range receives a lot
of precipitation because air cools and loses its
moisture as it rises over the mountains.
This causes a Rain Shadow, or dry area on the
other side of a mountain range.
Weather and Climate
part 2
Greenhouse Effect:
Gasses that trap heat keeping Earth's climate
warm.
Global Warming:
A warming of the Earth caused by more
greenhouse gases in the atmosphere.
Global Warming @ BrainPop