Unit 4: Global Challenge

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Presentation transcript:

Unit 4: Global Challenge THE NATURAL ENVIRONMENT Changeable Weather Aim: to understand mid-latitude weather systems Key questions… What sort of weather does the UK experience? What are the air masses affecting the UK? What impact does this have on weather in mid-latitude regions?

Britain’s varied climate… Mild summers, cold winters, dry Mild summers, mild winters, wet Warm summers, cold winters, dry Warm summers, mild winters, quite wet

Recap: What factors affect climate? Read p.20-23 Global Challenges and p.212-213 Geography an Integrated Approach Activities: What is meant by the terms ‘air mass’ and ‘source regions’? What is the prevailing wind in Britain & how does this affect our weather & climate? Draw an annotated sketch map to show the air flows that affect Britain Using p22-23 draw & colour isoline maps for Britain (rainfall/summer temps/winter temps/ sunshine) Describe & explain the variations seen in the maps.

Air Mass types Five main air masses affect Europe

Air mass classification • Tropical Maritime (Tm) - mild and moist • Tropical Continental (Tc) - warm and dry • Polar Maritime (Pm) - cool and moist • Polar Continental (Pc) - cold and dry • Arctic Maritime (Am) - cold and moist