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General Information
Regional Reports
- Total Column Ozone in Nova Scotia Past, Present and Future
Keith Keddy, Billie Beattie and Cindy Vallis
Environment Canada, Atlantic Region, Dartmouth, N.S.
- The Canadian UV Index Program and UV-B Measurements in Nova Scotia
Keith Keddy, Billie Beattie and Cindy Vallis
Environment Canada, Atlantic Region, Dartmouth, N.S.
- Five Years of Ozone and UV Data from the Brewer Spectrophotometer at Bedford, NS - 1993-1997
Keith N. Keddy, Billie L. Beattie, and Cindy N. Vallis
Environment Canada, Atlantic Region, Dartmouth, N.S.
Over the five-year period 1993 to 1997, average annual total column ozone at Bedford, Nova Scotia, ranged from a worst case of 6.9 percent below "normal" (the pre-1980 mean) in 1993, to a best case of 1.0 percent below normal in 1994. The highest daily maximum UV Index™ over the five-year period was 9.7 on July 12, 1993, which was about 30% above normal for that date. The authors explore the causes of ozone layer depletion and enhanced UV radiation levels. Although ozone depletions in southern Canada over the past few years have generally not been large, healing of the ozone layer, which had been expected to begin near the turn of the century, may be delayed. Justification for such concern is discussed.
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