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Measuring Ozone
Using a Zikua
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The Zikua measures ozone
• First tested in Africa
• Zikua is a Swahili word.
• Zikua means “seeing the invisible”
• Discovered an ozone problem in Africa from biomass burning
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GLOBE Program
• Students making measurements to help us better understand the Earth.
• The GLOBE Program
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How to make Ozone
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Global observations
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Researching Ozone Locally
Reading Ozone Level What’s the wind speed?
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Posting Data
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What we will measure
Quantity Units-----------------------------------------------------• Time … … … .. hour and minutes• Ozone … … … parts per billion (ppb)• Temperature … .. degress Centegrade• Humidity …. … … … %• Wind direction … …. N, S, E, W• Cloud type … … … cloud names
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Materials for measuring
• 1 Ozone strip • Zikua• 1 thermometer• Wind direction
measurer*• Cloud Chart• Hygrometer for
humidity• Ozone data recording
sheet
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The “ECOBADGE”
1--hour testCompare colorto chart
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Zikua: Making the Invisible, Visible
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Roles
• Data recorder• Ozone strip• Clouds• Humidity• Temperature• Wind Direction
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Procedure
• 1. Calibrate the Scanner put it on a table top Press button #1 until it displays CALIB Press button #2 to select WHT PAPER Press buttons #1 and 2 together (to save) (It should read 000)
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In the Field
• Put a fresh new ozone strip in the holder• DO NOT TOUCH THE CHEMICAL AREA
• Record the time.• Measure the temperature, humidity, cloud type,
and wind direction
• Leave the ozone strip for 1 hour
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After 1 hour
• Collect all of the data again: Time, temperature, wind direction, humidity, cloud type
• Read the ozone strip with the Zikua Carefully pick up the ozone strip. Turn on the Zikua and put it on a flat surface (not in sunlight) Slide the strip into the top of the Zikua. Center it. Record the ppb on the data sheet.
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How much Ozone?
• Low 0 to 20 ppb
• Normal 30-50 ppb
• High > 60 ppb