What Causes the Ozone Hole?

Scientists intrigued by Farman's findings went through the in composition taken by an instrument called the Total Ozone Mapping mass spectrometer (TOMS) on the polar orbiting Nimbus-7 satellite launched by NASA in 1978. The seasonal drop in ozone was clearly app arnt. The lot begins to form in the Antarctic Spring, about a month after the solarize starts to graze the horizon. In early November, the hole starts to disappear, in place because the sun has been high enough in the sky by that time for ozone-producing ultraviolet rays to penetrate the air.

The ozone hole over Antarctica exists because of the pole's curious atmosphere. Unlike the Northern Hemisphere, the South has no classicals and mountain ranges extending toward the pole, an collection that would bring air currents to mix with the atmosphere at the pole. As a result, there are no ozone-laden currents to replenish the picture over the South Pole as it is depleted. Also, Antarctica is colder than the gum elastic because of the absence seizure of air currents bringing in warm air and because the ice-covered continent does not absorb the sun's rays very well. These conditions also favor the formation of nocturnal stratospheric clouds.

These special conditions do not explain how the hole forms or why the concentration of ozone during October has been rapidly decreasing from course of study to year. A number of researchers have suspected chlorine, which catalytically destroys ozone, because it has been on the rise since the use of CFC

Although nought can be proved about the causes of ozone depletion, the potential for risk of infection is apparent.

Holes in the ozone layer have been discovered in the Arctic and Antarctica, but CFCs are still being used somewhat the world. Their long life makes them a threat for generations to come. Any fancy for those generations, however, requires an end to production and use of CFCs.

Oppenheimer, Michael, and Robert H. Boyle. Dead Heat: The backwash Against the Greenhouse Effect. New York: Basic Books, 1990.

"Can We Repair the cant over?" Consumer Reports, May 1989, 322-326.

If the basic processes responsible for the Antarctic hole are also operating in the Arctic, then scientists think the essence on the Northern Hemisphere would be less desolate because of the different weather patterns. Indeed, the largest drop in Arctic ozone occurs in February and is equivalent to a decrease of 2.6 percent a year, which is a little more than half the depletion rate measurements for Antarctica in October when the ozone mischief there is the greatest. The Arctic cavity is also one-third the size of the Antarctic.

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