I was
over at Climate Central discussing cracking sea ice, when Debi asked about a possible "Arctic Ozone Hole". I'm getting bored with the lack of clickable links over there, so to reiterate:
In October 2011 Richard Black of the Great British Broadcasting Corporation
reported on some
research by Gloria Manney et. al. that:
Ozone loss over the Arctic this year was so severe that for the first time it could be called an "ozone hole" like the Antarctic one.
Dave turned up the ozone section of the Environment Canada web site, which courtesy of
a very unwieldy URL reveals that there were indeed some anomalously low O
3 readings over the Arctic in spring 2011. Here's an image from two years ago today, by way of example:
Phil quoted the NASA web site on the unfortunate side effects of
Ultraviolet-B Radiation on the BiosphereIn the Antarctic, increased exposure to UV-B radiation due to the appearance of the ozone hole commonly results in at least a 6-12 percent reduction in photosynthesis by phytoplankton in surface waters.
Replacing 2011 with 2013 in the unwieldy URL above reveals no similar anomalies this year. Should we nonetheless be worrying about similar things happening in the Arctic in the not too distant future?