Weather Instruments - iGCSE Geography (CIE

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  • Weather Instruments
    • Stevenson Screen
      • Properties
        • 1.1m above the ground on a stand
          • Take temperature of air, not ground
        • Slatted Sides
          • Allows air to circulate
        • Roof made from double boarding
          • Prevent sun's heat from reaching inside of screen, affecting results
        • Situated in open space; away from trees, buildings
          • Allows accurate readings to be taken
        • Painted white
          • Reflect sun's rays
        • Door opens to the north
          • Prevents sun from affecting readings
      • Instruments inside
        • Wet and dry bulb thermometer
        • Maximum and minimum thermometer (Sixs thermometer)
    • Barometer
      • Pressure
      • Millibars
    • Anemometer
      • Wind speed
      • K/h
    • Weather vane
      • Wind direction
      • degrees
    • Rain guage
      • mm
      • Rainfall

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