Higher Geography Atmosphere Introduction

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An introduction to the Scottish Higher Geography atmosphere unit.

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Higher Geography Atmosphere Introduction

  1. 1. Atmosphere Higher Geography Physical Environments
  2. 2. Key Idea <ul><li>‘The characteristics of the atmosphere vary spatially and provide climate and weather conditions which interlink with other systems.’ </li></ul><ul><li>What do you need to know? </li></ul>
  3. 3. Students should have a knowledge and understanding on a: <ul><li>A) Global Scale </li></ul><ul><li>Effects of the atmosphere on receipt of radiation across the Earth. </li></ul><ul><li>Redistribution of energy patterns: atmospheric and oceanic circulation. </li></ul><ul><li>Global climate change. </li></ul>
  4. 4. Students should have a knowledge and understanding on a: <ul><li>B) Regional Scale - Case study of Tropical Africa </li></ul><ul><li>Nature, origin and movement of air masses: convergence and divergence of air masses. </li></ul><ul><li>Weather types associated with different air masses </li></ul><ul><li>The effect of these air masses on West African climates. </li></ul>
  5. 5. Geographical Skills <ul><li>You should also be able to: </li></ul><ul><li>interpret climatic maps, diagrams and graphs. </li></ul><ul><li>construct and analyse climate graphs. </li></ul>
  6. 6. Don’t Panic!
  7. 7. Introduction <ul><li>The atmosphere is the layer of gases surrounding the planet Earth and is retained by the Earth's gravitational field. </li></ul><ul><li>It contains some solid particles including volcanic dust and wind blown soil. </li></ul>
  8. 8. Atmosphere Composition <ul><li>Nitrogen – 78.09% </li></ul><ul><li>Oxygen – 20.95% </li></ul><ul><li>Argon – 0.93% </li></ul><ul><li>Plus variable amounts of carbon dioxide and water vapour (greenhouse gases). </li></ul>
  9. 9. Atmosphere Structure Troposphere 10 Km Stratosphere 40 Km Mesosphere 50 Km Thermosphere 300 Km Exosphere 400 Km
  10. 10. 10 100 90 80 120 70 60 50 40 30 20 130 140 110 Height in km -100 -80 -60 -40 -20 0 20 40 Temperature ºC Temperature Change with Altitude Maximum Ozone Temperature Stratosphere Mesosphere Thermosphere Troposphere
  11. 11. Variations in Atmospheric Composition <ul><li>The composition of the atmosphere varies with altitude. </li></ul><ul><li>Industrial areas may also affect the composition of the atmosphere, in particular air quality. </li></ul><ul><li>Water Vapour (due to evaporation) makes up a significant proportion of the atmosphere close to oceans and seas. </li></ul>

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