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Parameter Tree:
EARTH SCIENCE > ATMOSPHERE > AIR QUALITY > TROPOSPHERIC OZONE
Definition:
Ozone (O3) that is measured in the lowest 10-20 km of the Atmosphere.
While the maximum concentration of ozone occurs between 20-25 km, a
high concentration of ozone close to the Earth's surface is considered a
public health threat.  
Reference:
Glossary of Meteorology, American Meteorological Society, 1998.
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