Figure 3: This picture of the ozone over the Southern Hemisphere was based on readings from Nimbus 7 on 7 October 1987. In a 'normal' spring, ozone over Antarctica could be expected to remain thicker than 250 Dobson units (i.e. a 2.5mm layer at atmospheric pressure).
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Forest and Bird, Volume 19, Issue 3, 1 August 1988, Page 4
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46Figure 3: This picture of the ozone over the Southern Hemisphere was based on readings from Nimbus 7 on 7 October 1987. In a 'normal' spring, ozone over Antarctica could be expected to remain thicker than 250 Dobson units (i.e. a 2.5mm layer at atmospheric pressure). Forest and Bird, Volume 19, Issue 3, 1 August 1988, Page 4
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