Geography

Pages 8 to29 of Geography for Avery Hill.

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  • Created by: Megan
  • Created on: 10-09-08 20:46

Britain's Weather

Britain's Weather

  • The weather in the UK is very variable
  • When variations in daily weather conditions are aceraged out over a number of years, the pattern describes a country's climate
  • Temperatures are neither too hot or cold
  • This is called a Temperate
  • This is due to its location between the cold Arctic region and the hot Tropic of Cancer.
  • The UK recieves prevaling winds from the south-west.
  • The UK has a cool temperate maritime climate
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Depressions

Depressions

  • Much of Britain weather comes from low-pressure weather systems called depressions
  • They travel from WEST to EAST across the UK into western Europe.
  • They bring changeable weather with 2 main belts of rainfall; one with a warm front and the other cold front following it.

(http://www.bbc.co.uk/schools/gcsebitesize/geography/images/g_depression.gif)

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Winter Anticylones

Winter Anticyclones

  • In winter high pressure weather systems also affect Western Europe
  • They are caused by the cooling of the land
  • This is because between September and March the Sun provides less intense heat over the northern hemisphere
  • As the land cools it chills the air above it
  • This sinks causing high pressure at the surface
  • As air is not rising there are clear skies during both the day and night and extremely low temperatures
  • This sinking only affects 2 kilometres of the ground but bring cooooold weather.
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Summer Anticyclones

Summer Anticyclones

  • Summer of '99 brought hottest conditions experienced in England
  • Driest July since '11
  • Temperatures overtook those in Mediterranean
  • During July and early August there were several periods of hot weather in diffparts of the country
  • All associated with warm anticyclones
  • Developed when warm air from the Tropic of Cancer was brought by upper air winds towards Western Europe
  • As travelled north it became cool and sank over UK to bring high pressure, clear skies and tropical air
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Mediterranean

Mediterranean

  • Many UK residents go other countries for main hol
  • Lots travel south during peak holiday months of July & August to the islands & mainland resorts of Med
  • The Costa Blanca of Spain is due south from London
  • The popularity of of resorts like Benidorm has lasted for over 30 years
  • Climate is always hot and dry in Med
  • In Italy the cliamte can vary a great deal
  • Those areas which are further from influence of sea experience a wider range of temperatures
  • They heat up and cool down more than coastal areas
  • This pattern is called continentality
  • In mountainous areas such as Italian Alps winter temperatures can be very low!
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Monsoons

Monsoons

  • A monsoon is a seasonal wind
  • In the summer it blows northwards over India and Bangladesh
  • In the winter it blows southwards over these countries towards northern Australia
  • This cause dry weather conditions in Mumbai (Bombay)
  • When rains come rivers flood the land and fish spawn in the rice fields
  • People put away their ploughs and get out their fishing nets
  • Nearly 2000mm of rain falls in the summer
  • The north-west is a particularly arid region
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