Thunderstorms move a significant amount of ozone from the stratosphere down toward the earth’s surface — a process
that could have important impacts on climate, according to a recent study in the journal Geophysical Research Letters. Ozone shields the planet from the sun’s ultraviolet rays when it’s in the stratosphere, the second-lowest layer of the atmosphere, but ozone acts as a powerful greenhouse gas and pollutant when it’s nearer to the earth’s surface, in the troposphere. The study found that massive thunderheads, which can rise 50,000 feet above the ground, disturb the atmosphere and allow ozone to pour into the troposphere. Scientists had not previously known that storms play a key role in transporting ozone. The new findings could impact climate models, researchers say, especially since storms are expected to become more frequent and intense as the earth warms.