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EyeVisibility Produces a ray of light that burns into a marked piece of card Sunshine recorder Sunshine Shows the direction the wind is coming FROM Wind.

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Presentation on theme: "EyeVisibility Produces a ray of light that burns into a marked piece of card Sunshine recorder Sunshine Shows the direction the wind is coming FROM Wind."— Presentation transcript:

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2 EyeVisibility Produces a ray of light that burns into a marked piece of card Sunshine recorder Sunshine Shows the direction the wind is coming FROM Wind vaneWind direction Air pressure is marked on graph paper by pen on a sensitive arm. BarometerAir pressure Needs to be several metres off the ground AnemometerWind Speed Needs to be on a non splash surface Rain GaugePrecipitation Held in a Stevenson screen, which is 1m above ground, with slated sides, and painted white Thermometer (Max/Min) Temperature Any special features?What do we measure it with? What do we measure?

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4 Using full sentences suggest why: A Stevenson screen is slated, white and stands above the ground A rain gauge needs to be on a splash free surface Why an anemometer needs to be several metres off the ground?

5 Presenting Weather Data There are certain rules that apply when we look at weather data. Temperature and wind speed are shown as line graphs Precipitation is always shown as a bar graph Wind direction is shown on a wind rose Air pressure is shown on a barograph- which is a type of line graph without straight axis

6 Drawing Graphs It is possible that you will be asked to complete and or read a graph in your exam. Construct the following graphs: Temperature in Aberdeen, August º 14º 17º 20º Temperature Date 16º23 15º22 16º21 14º24 TemperatureDate

7 Rainfall in Aberdeen 2mm27 0mm26 3mm25 4mm24 1mm23 0mm22 4mm21 RainfallDate NW27 SW26 W25 W24 NW23 SW22 SW21 WindDate Wind direction in Aberdeen August 2003

8 BBC Weather symbols

9 What was the wind speed in the English Channel? What type of weather was Edinburgh experiencing? Describe the weather conditions in Ireland

10 Name the following weather instruments:

11 Rain Gauge-is dug into the ground so no water is splashed into it Wind Vane-has the main compass points on it. Sunshine Recorder-out in the open to catch all the sunlight and has a recording card marked in hours. Anemometer-has cups to catch the wind. Stevenson Screen- contains thermometers. Is painted white to reflect the sun's rays. Stands off the ground to measure air temp.

12 Why are computers used for weather forecasting?

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