What is ozone?
Ozone is a special form of oxygen with the chemical formula
Ozone constitutes a very small part of our atmosphere, but its presence is nevertheless vital to human well-being. Most ozone resides high up in the atmosphere, between 10 and 40km above Earth's surface. This region is called the stratosphere and it contains about 90% of all the ozone in the atmosphere.
Why do we care about atmospheric ozone?
Ozone in the stratosphere absorbs some of the Sun’s biologically harmful ultraviolet radiation. Because of this beneficial role, stratospheric ozone is considered “good” ozone. In contrast, excess ozone at Earth’s surface that is formed from pollutants is considered “bad” ozone because it can be harmful to humans, plants, and animals. The ozone that occurs naturally near the surface and in the lower atmosphere is also beneficial because ozone helps remove pollutants from the atmosphere.
Video about atmospheric ozone:
WMO informs about the ozone layer
WMO informs about the state of the ozone layer in several ways:
Near-real time plots from Antarctic stations
The third Bulletin for 2013 was published on 14 October. Click on the link below.
An Overview of the 2005 Antarctic Ozone Hole,
WMO Antarctic Ozone Bulletins from earlier years
The Secretariat of the World Meteorological Organization, in collaboration with the European Ozone Research Coordinating Unit, issues annual bulletins containing information on the development of the Arctic ozone layer over the course of each winter. The bulletins are based on data provided by WMO Members that operate atmospheric monitoring stations in the Arctic and satellites to observe ozone and related parameters globally.
The 2006 issue is the first joint WMO/EC Arctic Ozone Bulletin.
The 8th Ozone Research Managers' Meeting: Geneva 2-4 May 2011
The World Meteorological Organization, in collaboration with the United Nations Environment Programme (UNEP) is arranging the 8th Meeting of the Ozone Research Managers of the Parties to the Vienna Convention for the Protection of the Ozone Layer. Practical information can be found here.
The 7th Ozone Research Managers' Meeting: Geneva 18-21 May 2008
Information on the 7th ORM can be found here.
More information about the WMO/UNEP Scientific Assessments of Ozone Depletion can be found at the ozone assessment web pages of NOAA.
Description of the GAW Ozone Observing System
The GAW total ozone and profile ozone networks were designated at baseline networks of the Global Climate Observing System (GCOS) in 2007. The documentation to describe the ozone observing system can be found
WMO brochure on the protection of the ozone layer
WMO coordinates the global ozone observing network
The WMO-GAW ozone observing system comprises more than 100 stations worldwide that measure total column ozone and ozone profiles in the troposphere and stratosphere. The WMO secretariat coordinates training and calibration excercises. The WMO-GAW World Calibration Centre for Dobson total ozone measurements is located at the Global Monitoring Division of NOAA. The WMO-GAW World Calibration Centre for Brewer total ozone measurements is located at Environment Canada.The WMO-GAW World Calibration Centre for ozonesonde measurements is located at Forschungszentrum Jülich, Germany.
The WMO-GAW ozone observing system provides important data for the assessment of the state of the ozone layer and the data are used in the quadrennial WMO/UNEP Scientific Assessment of Ozone Depletion (see above). Data from Antarctica are delivered in near-real time and used in the WMO Antarctic Ozone Bulletins (see above).
Data from the WMO-GAW ozone observing system are collected and stored at the WMO World Ozone and Ultraviolet Radiation Data Centre (WOUDC) at Environment Canada, Toronto.
Several observational networks are contributing to the overall GAW system. In the field of ozone observations these two networks are linked to GAW. Click on them to go to their respective web sites.
Useful links to stratospheric ozone and UV radiation web sites
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