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ozone hole data

Further to my previous post, I just noticed that the WUWT blog post from 2015 includes a link to the NASA webpage which provides the ozone hole area data, and this webpage now includes data for the current year 2016:

ozone hole data

Using the same dataset as adopted in the WUWT blog post graph, which relates to the mean ozone hole area measured over the specific period Sept 7th to Oct 13th (presumably the hole area is at its biggest over that particular period of time), the area for 2016 is 20.9 million km², a drop from the 2015 value, but is the same as it was in 2014.

The other hole area versus time dataset on the NASA webpage gives the maximum area of the hole and the date it occurred, and for 2016 the maximum area is 23.0 million km², which represents a drop from the 2015 value, but the 2016 area is still higher than the maximum area for the hole seen in several previous years of the 21st century, 2012, 2010, 2004 and 2002.

So I don't see any strong evidence that the ozone hole is recovering.

As mentioned in the WUWT blog post, the people who came up with the 'CFCs are destroying the ozone layer' theory (Paul J. Crutzen, Mario J. Molina and F. Sherwood Rowland) were awarded a Nobel Prize for Chemistry in 1995. I remember thinking it was a bit premature to award them the prize in 1995 - you'd have thought that the Nobel Prize Committee would at least have waited for the ozone hole to close up before giving them it.

Re: ozone hole data - by Orde - Nov 28, 2016 10:58pm
Re: ozone hole data - by Dave Gardner - Dec 1, 2016 2:46pm