Sentences with phrase «ozone hole average»

Not exact matches

Compared to the 1991 - 2014 period, the ozone hole's average area this year was the fourth largest.

In fact the average concentration of ozone is everywhere lower than the value that used to define the present ozone hole.

Figure 2: Total column ozone loss relative to pre-ozone hole conditions in the 1970s in percent (left) and total number of molecules (right)(1 DU = 2.69 molecules / cm2) averaged over 2010 - 2019, during September for the Southern Hemisphere and March for the Northern Hemisphere.

The average ozone levels were observed to fluctuate dramatically from one spring to the next, so that little could be said about the hole's average size.

The ozone hole that forms each year in the stratosphere over Antarctica was slightly smaller in 2013 than average in recent decades, according to NASA satellite data.