3.) OZONE a) shows global ozone change compared to the 1964-1980 average. b) sho

Question

3.) OZONE a) shows global ozone change compared to the 1964-1980 average. b) shows total column ozone at the South Pole in 2010 and 2011 compared to the 1986-2009 average POLE OZONESONDE TOTAL a) Global Total Ozone Changes Changes trom 1964-1980 average b) 2010 2011 Annual averages Range of observations 1970 1980 990 2000 2010 Year a.) What role did chlorofluorocarbons (Freons) play in determining the shape of the graph on the left (a)? Specifically, why did Total Global Ozone start decreasing around 1980? Why did it level off in the early 1990s? (4 points) b.) Why did the total column ozone drop significantly in September and October of 2010 and 2011? Explain the processes that destroy ozone during Antarctic spring. (4 points) GEONE PARTIAL PRESSUREmPa) to profien n c) Why is there a normally a maximum in ozone concentration (partial pressure) at around 15-20 km altitude (blue line)? In other words, what processes create ozone in the stratosphere? (2 points)

Explanation / Answer

a) According to graph a and graph b ; we can say that the average global ozone compared in 1964-1980 was nearly 1 unit however in other phases it decline to -4 unit . So the global ozone is decreased with time.

b) We can say by graph b that total global ozone column in 2010 and 2011 averages the 1986-2009 level.

A)Chlorofluorocarbons(CFC) can increase the global warming as its quantity increases . If CFC increases or decreases it can have an effect on the graph. Global ozone started decline from 1980s because many international conferences were held to control global warming specially CFCs. This was the reason why its level starts decline in 1990s.

B) During Antarctica spring the temperature of that region stated decline and hence creat an atmosphere to have a cloud of CFCs which destroys the column ozone level.

C) Ozone is created by chemical reaction between ultraviolet rays of sun and oxygen in stratosphere.

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