Air Monitoring

The Truth Behind Ozone

Jun 03 2010

Author: Nicolas Moser on behalf of SGX Europe Sp. z o.o.

Free to read

This article has been unlocked and is ready to read.


This article presents the applications of ozone monitoring. What is ozone? How does it impact air quality? Why is it important to monitor ozone concentrations? What are the industrial applications of ozone?

Ozone (O3) is a triatomic molecule consisting of three oxygen atoms. It is a colorless gas with a pungent smell. Ozone at ground level – in the air we breathe – is an air pollutant and is not to be confused with the ozone layer in the upper atmosphere. Ozone in the upper atmosphere filters potentially damaging ultraviolet light from reaching the Earth’s surface. In the troposphere, near the Earth’s surface, human activities lead to ozone concentrations several times higher than the natural background level.

Ozone impact on air quality
Ozone is the main product of complex photochemical processes in the lower atmosphere involving oxides of nitrogen and volatile organic compounds as precursors. Ozone is a strong photochemical oxidant.
The main sectors that emit ozone precursors are road transport, power and heat generation plants, household (heating), industry, and petrol storage and distribution. The dominant issues determining short-term air
quality are nitrogen dioxide, particulate matter and ozone. All three pollutants are strongly related to the use of fossil fuels. Ground-level ozone (O3), unlike other pollutants mentioned, is not emitted directly into
the atmosphere, but is a secondary pollutant produced by reaction between nitrogen dioxide (NO2), hydrocarbons and sunlight. Sunlight provides the energy to initiate ozone formation; consequently, high
levels of ozone are generally observed during hot, still sunny, summertime weather. During the day, ozone concentrations will usually build up and peak in the afternoon. At night-time, ozone concentrations decline.

Free to read

This article has been unlocked and is ready to read.


Digital Edition

Asian Environmental Technology 27.2 - April/May 2023

May 2023

In This Edition Business News - Celebrating The Life Of A Gas Measurement Industry Icon - A New Home For Gas Sensor Specialists - Envea Completes The Acquisition Of Hycontrol Ltd Environ...

View all digital editions



Jun 06 2023 Bordeaux, France

Water Expo China

Jun 07 2023 Nanjing, China

Plast Expo

Jun 07 2023 El Jadida, Morocco


Jun 07 2023 Strasbourg, France


Jun 07 2023 Seoul, South Korea

View all events