Another year has passed and that stubborn Ozone Hole over Antarctica refuses to go away. Data from the National Aeronautics and Space Administration (NASA) shows that the Ozone Hole for the fall maximum season grew 22 percent from 2014 to 2015. World consumption of Ozone Depleting Substances has been reduced to zero over the last three decades, but the Ozone Hole is as large as ever. Did humans really save the ozone layer?
Goreham argues that the persistence of the ozone hole after CFC emissions reduced suggests that the ozone hole is natural. In reality, it shows that CFC are persistent pollutants.
Contrary to Goreham’s argument, CFC emissions do not directly affect ozone, rather atmospheric CFC concentrations do. CFC concentrations integrate emissions since CFC emissions began, less cumulative degradation of CFC. Atmospheric CFC concentrations are available from the Carbon Dioxide Information Analysis Center.
CFC concentrations are falling now that emissions have (mostly) ceased, but due to the long atmospheric lifespan of these gases, concentrations have only fallen slightly. CFC12 concentrations, for example, have fallen by less than 5%. Thus, if the ozone hole was driven by CFC12 alone, we would expect it to have have decreased by about 5%, rather than shrinking to zero as Goreham naïvely expects.
With the long atmospheric lifespan of CFCs, Goreham will have many more opportunities to show his willful ignorance.