Daily area of the ozone hole  

Area of the ozone hole as estimated daily from the EP/TOMS Level-3 ozone map. The ozone hole is assumed to be the region of the southern hemisphere with total column ozone amounts of less than 220 Dobson Units. The area of the ozone hole for this year (dots) and last year (solid line) are plotted over the full range of areas from previous years (shading).