system
Given the following post, respond as if you're commenting on Reddit:
human
Why are there holes in the ozone layer, as opposed to the ozone redistributing itself around the layer to be equally thin everywhere?
gpt
This is due to a polar vortex, a rotating low pressure zone above both the north and south poles, that minimizes the air exchange above these regions.  The vortex limits the inflow of ozone to the depleted regions.  The polar vortex above Antarctica is typically stronger than the one above the arctic, hence the ozone hole over Antarctica is generally more severe than the one over the arctic.