At issue is an Oct. 1 deadline for states to begin meeting 2015 standards for ground level ozone.

Evaluation of the state of the ozone layer and an understanding of ground level UV radiation require a stable, integrated global observing system consisting of ground based, airborne, and satellite measurements.

Protocol to the 1979 Convention on Long range Transboundary Air Pollution to Abate Acidification, Eutrophication and Ground level Ozone. Gothenburg (Sweden), 30 November 1999

Various atmospheric effects of climate change (e.g., cloud cover, aerosol abundance, albedo, temperature) on ground level UV may actually be larger than ozone induced effects.

Ground level ozone is created when common pollutants emitted by cars, power plants, oil refineries, chemical plants and other sources react in the atmosphere to sunlight.

Further research is needed on the response of ground level UV to changes in ozone, as well as to climate driven changes in other atmospheric parameters.

The continuity and long term stability of these highly complementary measurements are necessary to assess the onset of ozone layer recovery, to monitor its evolution, and to track changes in ground level UV radiation associated with ozone and climate.

In particular, GAW, through its more than 150 total ozone stations, has furnished critical ground truth data to calibrate ozone observations from space.

In particular, GAW, through its more than 150 total ozone monitoring stations, has furnished critical ground truth data to calibrate ozone observations from space.

On the contrary, the complexities of ozone and UV science highlighted above require the continuation and expansion of systematic measurement and analysis capabilities for tracking the evolution of ozone and climate related source gases and parameters, for detecting and tracking the stabilization and expected recovery of stratospheric ozone, for attributing changes in radiation forcing to changes in the ozone profile, and for deriving a global record of ground level UV radiation.

These notices could also be sent to other ozone officers at the regional level.

In a very tight, small this is the ground level.

of the Ozone Layer Ozone Layer

of the Ozone Layer Ozone Layer

Provide financial support to maintain both ground based and space borne measurement capabilities for climate and ozone related trace gases and atmospheric parameters.

The major programmes are Antarctic Magnetosphere Ionosphere Ground base Observations (AMIGO), Southern Hemisphere Auroral Radar Experiment (SHARE) and General Magnetospheric Studies and Ozone Studies.

At the time of the country visit this was on the agenda of the Ozone Unit and recently a high level officer was appointed to represent customs in the National Ozone Committee.

Provide financial and institutional support to maintain and to expand well calibrated ground based measurement networks for column ozone, including both spectral and filter instruments.

In addition, using four dimensional variational assimilation techniques, major global numerical weather forecasting centres are starting to assimilate real time ozone observations from satellites as well as ground based measurements in order to improve the analysis of stratospheric winds and ozone radiative effects.

Ground based measurements, as well as satellite data, are used periodically for the production in the framework of a United Nations programme of global ozone maps.

Activities carried out to commemorate Ozone Day included media broadcasts of high level officials, press releases, news articles, rallies, information seminars and round tables, technical training workshops, competitions involving ozone knowledge, posters, poems, ozone songs, dramas, public exhibitions and even the launching of websites and commemorative postage stamps.

Ozone depletion

Ozone Secretariat

(v) Efforts should be made aton the national level to enhance cooperation between cCustoms authorities, national ozone unitsNOUs, and other enforcement authorities

The Ozone Mafia

C. Stratospheric ozone

National Ozone Officer

Change and Ozone

Ozone Program Coordinator

(b) Ozone observations

C. Changes to the Ozone Secretariat website invitation for suggestions The Ozone Secretariat is in the process of making changes to the Ozone website.

Tropospheric Ozone Tropospheric ozone has just been recognized as a potentially important greenhouse gas.

The long wavelength end set at 350 nm was associated with the atmospheric cut off by the atmospheric ozone absorption and other issues affecting the efficiency of ground based instruments.

To show the perception of desertification at grass root level, the reality on the ground problems.

Deplete the Ozone Layer

Deplete the Ozone Layer

Source Ozone Secretariat database.

Deplete the Ozone Layer

Deplete the Ozone Layer

Ozone Depletion 50 million

of the Ozone Layer

Ozone depletion 50 million

Coordinator, Cameroon Ozone Office

Head of Ozone Unit

Chief, National Ozone Unit