4. Uk Weather Is Becoming More Extreme


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4. Uk Weather Is Becoming More Extreme

  1. 1. UK weather is becoming more extreme. This has an impact on human activity which may be positive or negative .
  2. 2. Objectives <ul><li>To describe the evidence that weather is becoming more extreme. Weather events from the last 10 years – a consideration of evidence that weather is becoming more extreme. </li></ul><ul><li>To explain the impact of this on people’s homes and lives, agriculture, health, transport </li></ul><ul><li>To explain the benefits and costs and issues raised </li></ul><ul><li>To explain the need for adequate warning, preparation, plans to deal with impacts. </li></ul>
  3. 3. starter <ul><li>http://www.youtube.com/watch?v=eN2OJjd_fXw&feature=PlayList&p=C5B46D18D577C417&index=0 </li></ul>
  4. 4. What do we mean by extreme weather? <ul><li>More severe than usual </li></ul><ul><li>Very cold in winter </li></ul><ul><li>Heatwaves in summer </li></ul><ul><li>Heavy rain leading to flash floods </li></ul><ul><li>Drought </li></ul><ul><li>Gale and storm force winds </li></ul><ul><li>Blizzards and heavy snowfall </li></ul>
  5. 5. Recent extreme weather events in the UK (textbook page 62) Very wet summer – flooding May: Somerset Sept: S.Wales, Worcestershire, Northumberalnd 2008 Floods- Hull, Sheffield, Tewkesbury 2007 Intense heat wave. Highest ever temperature recorded in Kent 38.5o 2003 Series of deep depressions brought large amounts of rainfall, gale force winds to southern England 2000
  6. 6. Is it really ‘extreme’? <ul><li>Why doesn’t the UK experience hurricanes but we do get small tornadoes? </li></ul><ul><li>Why do we not get a deep freeze like they do in Canada or Siberia? </li></ul>
  7. 7. <ul><li>Which extreme events are caused by high pressure dominating the weather for weeks and months? </li></ul><ul><li>Which extreme events result from low pressure and fronts sitting over the UK for several days instead of moving on? </li></ul><ul><li>Which extreme weather event is caused by a steep pressure gradient? </li></ul>
  8. 8. How does extreme weather impact… Transport Health Agriculture People’s homes and lives
  9. 9. Extreme weather costs and benefits Environmental Economic Social Benefit Cost
  10. 10. Links to global warming <ul><li>Extreme weather events may become more frequent as the atmosphere warms up but no individual event can be blamed on global warming. </li></ul><ul><li>Evidence has to be drawn from hundreds of years before reliable links cam be made </li></ul>
  11. 11. Case study <ul><li>You need to produce a case study summary of an ‘extreme’ weather event in the UK. Do this as an illustrated mind map </li></ul><ul><li>Choose either: </li></ul><ul><ul><ul><li>Boscastle flood 2004 </li></ul></ul></ul><ul><ul><ul><li>or </li></ul></ul></ul><ul><ul><ul><li>summer floods 2007 (wettest summer on record) </li></ul></ul></ul><ul><li>include map, photos and bullet point facts </li></ul><ul><li>Headings to use: </li></ul><ul><ul><li>Causes </li></ul></ul><ul><ul><li>Areas affected and damage </li></ul></ul><ul><ul><li>Economic impacts </li></ul></ul><ul><ul><li>Social impacts </li></ul></ul><ul><ul><li>Immediate responses </li></ul></ul><ul><ul><li>Long term responses and future planning </li></ul></ul>
  12. 12. How can the negative impacts be reduced? * PREDICTION / WARNING Environment Agency How? Why? What can be done? *PREPARING What can individuals do? What can local authorities do? * PLANNING Emergency services Local councils
  13. 13. plenary