Yes, what's up! Here we go. Climate change and ozone depletion affect one another in complicated ways. In simple terms, "the ozone hole" pertains to the Southern Hemisphere. However, reductions in ozone content in the stratosphere above the Arctic have been recorded during the northern winter untill early spring (January through March) in recent years. These reductions, about 20-25%, are much smaller than those measured in each southern spring (September through December) over the Antarctic ozone hole, the big one.
) occurs in two different regions of our planet's atmosphere. Most of it is in the "ozone layer" of the stratosphere as shown in the first figure. (Credit: NOAA.) The remaining ozone is in the troposphere where almost all human activities take place.
The next figure (credit: NOAA) illustrates 'the good and the bad' effects of the atmospheric ozone merely depending upon location. Hence, the good and to be protected ozone is "up" in the stratosphere. The bad and to be reduced is "down" in the troposphere.
Ozone in the Zone
decribes measurements at the Amundsen-Scott South Pole Station (ASSPS). Updated below is its data list for recent ozone thicknesses at ASSPS and some ozone-hole sizes per NOAA (or others as indicated):
26 September 2009: 94 DU (per NASA)
17 September 2009: 9.7+ million square miles (a little larger than N America per EUMETSAT)
28 September 2008: 107 DU
12 September 2008: 10.5 million square miles and 4 miles deep (5th largest)
08 October 2007: 9.7 million square miles (about the size of N America)
09 October 2006: 11.4 million square miles (the largest)
06 October 1993: 89 DU (the lowest) (Update per NOAA; previously, 12 October 1993.)
In summary, the maximum hole area occurred around the middle of September 2009. It was larger than 2007's and N America. Moreover, ozone depleted below last year's 107 DU down to 94 DU. My prediction of a bigger hole in 2009 appears close within measurements' accuracy.
Please study the data below from NOAA SBUV-2 satellite instruments aboard NOAA-18 for 25 September 2009.
Compare the image above with that of theozonehole.com shown below. Do you see differences in two ozone hole images by NOAA and theozonehole.com, respectively?
Because NOAA.gov reported the Antarctic ozone hole reached "its 2009 peak circumference in late September" and "its thinnest point of the year on [26 September]" over ASSPS, I am posting that day's image from theozonehole.com. Do you see differences between two images from the same source?
Oh, one more on what's up? NOAA-19. NOAA-N Prime, mentioned in Ozone in the Zone
is now called NOAA-19. It was launched successfully two days later than 4 February 2009 after several attempts. The launch sequence was scrubbed at least twice due to ground support equipment failures. Let's look forward to seeing NOAA-19 measurements soon.