Ozone Depletion

In: Business and Management

Submitted By tgraham
Words 2388
Pages 10
Running Head: OZONE DEPLETION

Taylor Graham

Ozone Depletion

The Ozone Layer
The ozone layer prevents most harmful solar ultraviolet light, (UV) from passing through the earth’s atmosphere by absorbing 93-99% of these UV rays. UV rays are potentially damaging to life on earth. The ozone layer is comprised of high concentrations of ozone, (03) and mainly located in the lower portion of the stratosphere (rabbitair.com). The atmosphere of the Earth is divided into 5 layers. From closest and thickest to farthest and thinnest the layers are: troposphere, stratosphere, mesosphere, thermosphere and exosphere. The majority of the atmosphere’s ozone resides in the stratosphere, which extends from 6 miles above the Earth’s surface to 31 miles (Sivasakthivel, 2011). The density of the ozone varies according to the season and also the location. The ozone layer has historically protected the Earth from the harmful UV rays, however in recent decades this protection has diminished due to stratospheric ozone depletion.
History of Ozone Depletion Ozone depletion is largely a result of man-made substances. Humans have introduced gases and chemicals into the atmosphere that have rapidly depleted the ozone layer in the last century. The possibility of ozone depletion was first introduced by scientists in the late 1960's as dreams of supersonic transport began to become a reality. Scientists had long been aware that nitric oxide (NO) can catalytically react with ozone (O3) to produce O2 molecules; however, NO molecules produced at ground level have a half-life far too short to make it into the stratosphere (Sivasakthivel, 2011). It was not until the advent of commercial supersonic jets (which fly in the stratosphere and at an altitude much higher than conventional jets) that the potential for NO to react with stratospheric ozone became a possibility. The threat of…...

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