Antarctic Mountains Causing Ozone Depletion

Here is an interesting article about ozone depletion in Antarctica. The new research suggests that the Antarctic mountains are contributing to the ozone depletion and I guess why the ozone hole is in that region. The mountains cause high clouds called polar stratospheric clouds to be formed, which is supposedly the only way ozone depletion is caused (i.e. only on the surface of these clouds or due to these clouds).