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<50% <10% <1% <0.1% mass of the atmosphere: 5 x 1000000000000000000 kg.

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Presentation on theme: "<50% <10% <1% <0.1% mass of the atmosphere: 5 x 1000000000000000000 kg."— Presentation transcript:

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2 <50% <10% <1% <0.1% mass of the atmosphere: 5 x 1000000000000000000 kg

3 mass of the atmosphere: 5 x 10 18 kg <50% <10% <1% <0.1%

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7 Fast vertical mixing Mixing across tropopause is slow Fast vertical mixing Direct interface with surface T  w/ altitude (adiabatic lapse rate) Rapid vertical mixing High T because of: high E of bomb. radiation Slow vertical mixing T  w/ altitude because of h abs. by O 3 T  w/ altitude because h abs. by O 3 less important

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10 In 1780, the famous English chemist Joseph Priestley (right) found that plants could "restore air which has been injured by the burning of candles." He used a mint plant, and placed it into an upturned glass jar in a vessel of water for several days. He then found that "the air would neither extinguish a candle, nor was it all inconvenient to a mouse which I put into it". In other words, he discovered that plants produce oxygen. A few years later, in 1794, the French chemist Antoine Lavoisier (left), discovered the concept of oxidation, but soon after was executed during the French Revolution for being a Monarchist sympathiser. The judge who pronounced sentence said "The Republic has no need for scientists".

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12 mass of the atmosphere: 5 x 10 18 kg


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