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ozone
Introduction References & Edit History Quick Facts & Related Topics
Images, Videos & Interactives
Curved horizon of Earth seen from space with a blue atmospheric layer above white clouds, set against a black sky filled with stars.
New York City skyline tinted orange from wildfire smoke.
Three researchers in winter clothing launch a large transparent balloon carrying an ozonesonde on a snowy field at South Pole Station in Antarctica, with research buildings in the background. Figure 16: Column abundance of O3 as function of latitude and time of year in Dobson units (one Dobson unit defines the content of O3 in a column of one-millimetre length at standard air pressure and temperature). Southern Hemisphere ozone hole Diagram illustrating ozone chemistry in pure oxygen, showing the cyclical reactions between molecular oxygen (O2), atomic oxygen (O), and ozone (O3), with arrows indicating conversion steps and the role of light energy.

ozone: References & Edit History

Article Contributors

Primary Contributors

  • The Editors of Encyclopaedia Britannica
    Encyclopaedia Britannica's editors oversee subject areas in which they have extensive knowledge, whether from years of experience gained by working on that content or via study for an advanced degree. They write new content and verify and edit content received from contributors.

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: NASA Science - Ozone. Aug 22, 2026
Add new Web site: University of Minnesota Libraries - Environmental Biology - Ozone. Mar 06, 2026
Add new Web site: North Carolina Institute for Climate Studies - What is ozone, how is it formed, and where is it in the atmosphere? (PDF). Aug 07, 2025
Add new Web site: PNAS - Observed suppression of ozone formation at extremely high temperatures due to chemical and biophysical feedbacks. May 17, 2025
Add new Web site: National Park Service - Ozone Effects on Human Health. Dec 11, 2024
Add new Web site: CORE - Ozone and Ultraviolet Radiation (PDF). Sep 21, 2024
Media added. May 16, 2024
Add new Web site: Live Science - What is ozone? May 03, 2024
Added a box of the six criteria air pollutants. May 02, 2024
Media added. May 02, 2024
Add new Web site: U.S. Environmental Protection Agency - What is Ozone? Dec 29, 2023
Add new Web site: NOAA Cameo Chemicals - Ozone. Oct 31, 2023
Add new Web site: Frontiers - Ozone in Medicine: A Few Points of Reflections. Mar 02, 2023
Add new Web site: Frontiers - Ozone in Medicine: A Few Points of Reflections. Mar 02, 2023
Add new Web site: Chemistry LibreTexts - Ozone. Oct 31, 2022
Add new Web site: National Center for Biotechnology Information - PubMed Central - Ozone therapy : an overview of pharmacodynamics, current research, and clinical utility. Oct 17, 2022
Add new Web site: Academia - Ozone layer. Sep 07, 2022
Deleted video. Mar 09, 2021
New media added. Feb 04, 2021
Corrected display issue. Mar 01, 2019
Add new Web site: NASA Science - Ozone. Feb 08, 2019
Add new Web site: Enviropedia - Ozone. Feb 08, 2019
Added new Web site: University Corporation for Atmospheric Research - Introduction to Ozone. Jan 28, 2009
Added new Web site: Environmental Education For Kids - What is Ozone? Jun 30, 2008
Added new Web site: University of Wisconsin-Madison - Ozone. Feb 13, 2008
Added new Web site: National Oceanicand Atmospheric Administration - Ozone. Feb 13, 2008
Added new Web site: University of Bristol - Ozone. Feb 13, 2008
Added new Web site: RCN Corporation - Ozone. Feb 13, 2008
Added new Web site: U.S. Environmental Protection Agency - Ozone. Feb 13, 2008
Added new Web site: Bureau of Meteorology - Ozone. Jul 23, 2007
Article added to new online database. Jul 20, 1998
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