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The Atmosphere

The Atmosphere. Physical. 15 º C. 50 km. Stratosphere. 15 km. -70 º C. Troposphere. 15 º C. Chemical – what are the main gases ?. Nitrogen. 78 %. 21%. Oxygen. Argon. 1%. 350 ppm. Carbon Dioxide. What are ppm?. ppm = parts per million. so 350 ppm. means 350/1000000.

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The Atmosphere

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  1. The Atmosphere

  2. Physical 15ºC 50 km Stratosphere 15 km -70ºC Troposphere 15ºC

  3. Chemical – what are the main gases ? Nitrogen 78 % 21% Oxygen Argon 1% 350 ppm Carbon Dioxide

  4. What are ppm? ppm = parts per million. so 350 ppm means 350/1000000 = 3.5 × 10 - 4 on your calculator times 100 = 3.5 × 10 - 2 % = 0.035 %

  5. Now your turn ! What is the % neon in air ? – 18 ppm 0.0018 % How many ppm is argon ? 1% 10000 ppm

  6. Deaths from melanoma in USA o o o o o o o o o o o o o o o o o 30 Latitude / ºN 40 50

  7. Why is sunlight more intense at the equator ? smaller distance through atmosphere less spread out

  8. What frequencies of radiation are the most dangerous ? Why ?

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