Term
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Definition
| molecules containing only carbon, chlorine and fluorine |
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Term
| Stratospheric Ozone Variations: Natural |
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Definition
| Suns radiation,Latitude,Winds,Seasonal Variations, and Gases. |
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Term
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Definition
| a highly reactive chemical species that contain one unpaired electron. |
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Term
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Definition
| a substance that speeds up the rate of a reaction without being concumedin the reaction. |
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Term
| Polar Stratospheric Clouds |
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Definition
clouds composed of small ice crystals in the stratosphere. Must be less than -78 oCto form.
form 10-18 miles above the Earth. |
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Term
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Definition
(1)Refrigerants in refrigerators and air conditioners.
(2) Propellants in aerosol cans.
(3) Plastic expanders: polystyrene.
(4) Fire extinguishers (bromine & fluorine). |
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Term
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Definition
variations in the intensity of the Sun’s radiation.
The higher the UV radiation, the greater the amount of O3 produced |
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Term
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Definition
| The higher the latitude (closer to the Poles), the higher the O3 concentration. |
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Term
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Definition
Stratospheric winds alter the ozone concentration.
Prevailing Stratospheric winds transports ozone from the equator toward the Poles. |
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Term
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Definition
| highest levels of ozone are found in the spring, not summer, and the lowest in the autumn, not winter in the northern hemisphere. |
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Term
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Definition
water vapor (H2O) and nitrogen monoxide (NO) destroy stratospheric ozone.
Free radicals in the stratosphere destroy ozone. |
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Term
| Arctic winters not as cold as... |
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Definition
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Term
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Definition
| Effects of CFCs on ozone hypothesized by Rowland & Molina; won Nobel prize in 1995 for their work. |
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Term
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Definition
| Manufacture/sale of CFCs for spray cans banned in U.S. |
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Term
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Definition
| Use of CFCs as foaming agents for plastics banned in U.S. |
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Term
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Definition
| Montreal Protocol. Initially 27 countries agreed to limit the production of CFCs and Halons. Today 195 countries have signed the Protocol. |
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