Measuring Ozone

Using a Zikua

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

GLOBE Program

• Students making measurements to help us better understand the Earth.

• The GLOBE Program

How to make Ozone

Global observations

Researching Ozone Locally

Reading Ozone Level What’s the wind speed?

Posting Data

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

Materials for measuring

• 1 Ozone strip • Zikua• 1 thermometer• Wind direction

measurer*• Cloud Chart• Hygrometer for

humidity• Ozone data recording

sheet

The “ECOBADGE”

1--hour testCompare colorto chart

Zikua: Making the Invisible, Visible

Roles

• Data recorder• Ozone strip• Clouds• Humidity• Temperature• Wind Direction

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)

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

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.

How much Ozone?

• Low 0 to 20 ppb

• Normal 30-50 ppb

• High > 60 ppb