lesson 5 what are depressions (1)
TRANSCRIPT
What are depressions?
8 December 2014
How does low pressure affect the UK? Depressions.
What are depressions?
How is this important to geography?
What are depressions?
How does low pressure affect the UK? Depressions.
Quiz:
Spot the airmass. 5 Questions.
Which Airmass is most likely to be affecting the UK?
8 December 2014
What are depressions?
1.
What are depressions?
2.
What are depressions?
3.
What are depressions?
4.
What are depressions?
5.
What are depressions?
Surface pressure chart
Warm Front – Warmer, tropical air behind
Cold Front – colder, polar air behind
What are depressions?
What happens when air masses meet?
• Key point: Air masses do not mix
• The point a which two or more air masses meet are called FRONTS
• Air rises, cools, condenses into cloud
What are depressions?
Warm front
What are depressions?
Cold Front
What are depressions?
Occluded Front
What are depressions?
What are depressions?
Infra Red Satellite Image – can you spot the cold front? What will happen to the temperature?
What are depressions?
Depressions
What are depressions?
What are depressions?
What are depressions?
Warm Front
Area of low pressure
Cold Front
Pat
What are depressions?
Describe the direction of air flow in a depression.
What are depressions?
Warm Front
Cold Front
Warm Sector
Low Pressure
Draw the direction of air flow
WhereIs Pat?
What are depressions?
Why are there showers here?
Frontal
Convection
or
Relief rainfall.
Why are there clouds here?
Why is it clearer here?
What are depressions?
Warm Front Intermittent Showers Nimbostratus CloudsCirrus Clouds
Warm Sector
Cold Front
Continuous Rain Showers after the Cold Front
Rain, Thunder and Lightening
Cumulonimbus clouds
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What are depressions?
What are depressions?
Exam question