Arctic ozone: ‘Hole’ or just not whole?

Some scientists argue the far North’s ozone merely thinned.

By Janet Raloff, 15:21 PM October 4, 2011

This past spring, the Arctic stratosphere’s ozone layer suffered unprecedented depletion. But whether the record loss constituted a “hole” depends on which experts you consult.

In a Nature paper published online earlier this week, Gloria Manney of NASA’s Jet Propulsion Laboratory in Pasadena and more than two dozen coauthors describe the 2011 loss as “an Arctic ozone hole.” Other renowned scientists have been weighing in — and some argue that as dramatic as this year's thinning was, a hole...

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