Every August, the ozone hole begins to grow over Antarctica, reaching its maximum size by late September. But by the New Year, it’s gone again. Russell Schnell, of NOAA’s Earth System Research Laboratory, explains the weird forces behind the ozone hole’s formation—and why, in recent years, an ozone hole has capped the Arctic too.
Russell Schnell is a deputy director in the global marketing division of the Earth System Research Laboratory at the National Oceanic and Atmospheric Administration (NOAA). He is based in Boulder, Colorado.
Meet the Producers
About Jon Chang
Jon Chang is a science reporter based in New York City. He also has an unhealthy obsession with math, even if he’s not very good at it.