"Bob May" once again asked in message
...

Why isn't there an Ozone Hole at the NORTH Pole?

Why, Bob?
Do you want one?

from http://www.al.noaa.gov/WWWHD/pubdocs...nt98/faq7.html
"The difference between ozone content in the two polar regions is caused by
dissimilar weather patterns. The Antarctic continent is a very large land mass
surrounded by oceans. This symmetrical condition produces very low
stratospheric temperatures within a meteorologically isolated region, the
so-called polar vortex, which extends from about 65°S to the pole. The cold
temperatures lead in turn to the formation of clouds, known as polar
stratospheric clouds. These clouds provide surfaces that promote production of
forms of chlorine and bromine that are chemically active and can rapidly
destroy ozone. The conditions that maintain elevated levels of chemically
active chlorine and bromine persist into September and October in Antarctica,
when sunlight returns over the region to initiate ozone depletion.

The winter meteorological conditions in the Northern Hemisphere, just like in
the Southern Hemisphere, lead to the formation of an isolated region bounded
by strong winds, in which the temperature is also cold enough for polar
stratospheric clouds to form. However, the geographic symmetry about the North
Pole is less than about the South Pole. As a result, large-scale weather
systems disturb the wind flow, making it less stable over the Arctic region
than over the Antarctic continent. These disturbances prevent the temperature
in the Arctic stratosphere from being as cold as in the Antarctic
stratosphere, and fewer polar stratospheric clouds are therefore formed.
Nevertheless, chemically active chlorine and bromine compounds are also formed
over the Arctic, as they are over Antarctica, from reactions at the surface of
the clouds. But the cold conditions rarely persist into March, when sufficient
sunlight is available to initiate large ozone depletion."

....but whadd'a they know?

--

Jeff R.