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OUTLINE

SUN’S UV RADIATION AND OZONE LAYER THICKNESS: RESULTS OF MONITORING DURING THE YEAR 2011 Z . Mijatovi ć and R. Kobilarov Dapartment of Physics, Faculty of Sciences, University of Novi Sad , Serbia. OUTLINE. Introduction Measurement equipment Ozone layer UV Index Results Ozone layer

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OUTLINE

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  1. SUN’S UV RADIATION AND OZONE LAYER THICKNESS: RESULTS OF MONITORING DURING THE YEAR 2011Z. Mijatović and R. KobilarovDapartmentof Physics, Faculty of Sciences, University of Novi Sad, Serbia

  2. OUTLINE • Introduction • Measurement equipment • Ozone layer • UV Index • Results • Ozone layer • UV Index • Conclusion

  3. OZONE (O3 molecule) IN THE STRATOSPHERE “Good” ozone is formed in the stratosphere, about 20-50 km above the Earth Ozone layer protects the Earth from harmful Sun’s UV radiation

  4. OZONE (O3 molecule) IN THE STRATOSPHERE Natural process of ozone production in the stratosphere BUT … Human activities and emission of various gases (nitrogen oxides, CFC etc) into the atmosphere destroy ozone layer X = Cl, Br, F …

  5. OZONE AND UV RADIATION Depletion of ozone layer causes increased intensity of UV radiation HARMFUL EFFECTS ECO SYSTEMS MATERIALS HUMANS AND ANIMALS • EYES • Snow blindness • Cataracta • Eye cancers • SKIN • Redenning • Premature aging • Melanoma and other cancers IMMUNE SYSTEM - Suppression

  6. MEASURING EQUIPPMENT Solar Light Microtops Ozonemeter II Measures ozone layer thickness based on the absorption of Sun’s light at three wavelenghts YES - Ultraviolet Pyranometer Model UVB-1, Yankee Environmental Systems Inc.

  7. OZONE LAYER THICKNESS Ozone layer thickness does not show significant seasonal changes during the years of monitoring (2007 – 2011). The exceptions are the periods during October 2010 and October-December 2011 when values below 220 DU were recorded. These values correspond to the ozone hole. We do not have explanation for this appearance, in the moment. Possible explanation is pollution from unknown source, local, but more probable the distant one …

  8. UV INDEX Results of UV radiation monitoring in the period 2003 -2011. Maximal values are recorded during the period end of June – beginning of July. Recorded values are about 9 in that period. No significant changes from year to year have been noticed.

  9. PUBLIC INFORMATION • DIFFERENT MEDIA • INTERNET ADDRESS: http://cmep.rs

  10. CONCLUSION ON THE BASIS OF PRESENTED MONITORING ACTIVITIES: • NO SIGNIFICANT CHANGES IN OZONE LAYER THICKNESS OR SUN’S RADIATION INTENSITY HAVE BEEN RECORDED DURING THE CRITICAL PERIOD OF HIGH UV LEVEL (SUMMER) • EXCEPTION IS THE PERIOD DURING OCTOBER 2010 AND END OF THE YEAR 2011 WHEN UNUSUALLY LOW VALUES OF OZONE LAYER THICKNES WERE RECORDED

  11. THANK YOU FOR ATTENTION!!!!!!This work is partially supported by:- City of Novi Sad, Directorate for Environmental Protection - Republic Ministry of Education and Science

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