Introduction Measurement equipment Ozone layer UV Index Results Ozone layer UV Index Conclusion.

Introduction Measurement equipment

Ozone layerUV Index

ResultsOzone layerUV Index

Conclusion

“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

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

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OXOXO

OXOOX

X = Cl, Br, F …

Depletion of ozone layer causes increased intensity of UV radiation

HARMFUL EFFECTS

ECO SYSTEMS MATERIALS HUMANS AND ANIMALS

SKIN• Redenning• Premature aging• Melanoma and other cancers

EYES• Snow blindness• Cataracta• Eye cancers

IMMUNE SYSTEM - Suppression

Solar Light Microtops Ozonemeter IIMeasures ozone layer thickness based on the absorption of Sun’s light at three wavelenghts

YES - Ultraviolet PyranometerModel UVB-1, Yankee Environmental Systems Inc.

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Ozo

ne la

yer t

hick

ness

(D

U)

Date

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 …

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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.

DIFFERENT MEDIA INTERNET ADDRESS: http://cmep.rs

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