PAPER 1: SECTION A: WEATHER HAZARDS 1. GLOBAL ATMOSPHERIC CIRCULATION Use your exercise book – this is REVISION Missing work? Ask your teacher or borrow a book. Tables will need to be made bigger – check before you print. Global atmospheric circulation Unscramble the words to complete this definition of global atmospheric circulation: The worldwide system of W N D I S , which transport E T H A from tropical latitudes northwards to L P O A R latitudes. High and low pressure areas have different climates (temperature and precipitation) Draw a picture to help you remember the following facts: Fact Illustration (picture) Warm air rises. When warm air rises it creates an area of low pressure (imagine a weight being taken off your shoulders). When warm air rises, it cools, condenses, clouds are formed and it precipitates (rain/hail/sleet/snow). Cold air sinks. When air sinks it creates an area of high pressure (imagine a weight being loaded on top of you). When cold air sinks towards the earth, it warms up. Warm air can hold a lot of moisture so clouds are not formed so there is very little precipitation. 1
Transcript
PAPER 1: SECTION A: WEATHER HAZARDS
1. GLOBAL ATMOSPHERIC CIRCULATION
Use your exercise book – this is REVISIONMissing work? Ask your teacher or borrow a book.
Tables will need to be made bigger – check before you print.Global atmospheric circulationUnscramble the words to complete this definition of global atmospheric circulation:
The worldwide system of W N D I S, which transport E T H A from tropical latitudes northwards to L P O A R latitudes.
High and low pressure areas have different climates (temperature and precipitation)Draw a picture to help you remember the following facts:Fact Illustration (picture)Warm air rises.
When warm air rises it creates an area of low pressure (imagine a weight being taken off your shoulders).
When warm air rises, it cools, condenses, clouds are formed and it precipitates (rain/hail/sleet/snow).
Cold air sinks.
When air sinks it creates an area of high pressure (imagine a weight being loaded on top of you).
When cold air sinks towards the earth, it warms up. Warm air can hold a lot of moisture so clouds are not formed so there is very little precipitation.
Use the information on p1 and the diagram below to complete this table:
Area of the world
Does solar energy
Size of the area that
Temperature here….
Air pressure
Levels of precipitati
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(sun’s rays) strike this area….
solar energy is spread out over…
here…. on
Answer choices: Directly at a right angle?
orAt a low angle?
Large?orsmall?
HotorCold?
HighorLow?
High levelsorlow levels?
Equator
Arctic/Antarctica
This diagram shows global atmospheric circulation. This involves a number of circular air movements called cells. These cells all join together to form the overall circulation of the Earth’s atmosphere.
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Complete these sentences by unscrambling the words:
Air that is sinking towards the ground surface forms areas of H G I H pressure (for example at the
North Pole). Winds on the ground move outwards from these areas.
Air that is G I I R S N from the ground surface forms areas of low pressure on the ground, for
example at the Equator. Winds on the ground move towards these areas of W O L pressure.
Winds on the ground are distorted by the Earth’s rotation. This rotation of the Earth is called the
Coriolis Force/Effect. Winds E U C R V as they move from areas of high pressure to areas of low
pressure. (See the information below)
Surface winds are very important in transferring T A E H and U S O M I T R E from one place to another.
The patterns of pressure belts and winds are affected by seasonal changes. The tilt and rotation of the Earth causes relative changes in the position of the overhead U N S. These seasonal changes
cause pressure belts and winds to move H O N R T during our summer and then south during ourwinter.
Coriolis Force:Use the information below, which part of the Earth has to spin the fastest?
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Use all the information above and your book to add the following to the blank diagram below:
On the diagram above, label the areas of high and low pressure: Equatorial low (which includes the Intertropical Convergence Zone - ITCZ) Sub-tropical high Sub-polar low Polar high
On the diagram, use a red crayon to show the hot air rising at the low pressure areas.On the diagram, use a blue crayon to show the cold air sinking at the high pressure areas.
Label three of the cells using these labels: Hadley Cell Ferrell Cell Polar Cell
Draw the UK just below the 60˚ line of latitude – the UK is about 55˚N of the Equator.
Why does it cloudy and wet in the UK?
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Use the diagrams above to answer these questions:Which two cells is the UK between?
Where is the warm air coming from?
Where is the cold air coming from?What type of air pressure do we have?
What happens when the warm air meets cold air? Explain your answer.
Recap of your understanding of global atmospheric circulation:
Stretch yourself (this task is optional): Use all the information in this homework and the classwork in your book to complete this table:
Line of latitude (˚)
Air pressure (high
Cell (Hadley, Ferrell
Temperature
Precipitation
Explain the temperature and precipitation levels (why is it high/low?)
