why is the concentration of ozone less over the north and south poles

Dear Student,

The ozone found in the equator is relatively lower than in poles due to atmospheric circulation of ozone to the latter part.The reduction in the ozone levels is an annual process that takes place in the poles where the concentration of ozone is less than 220 dobson. The sharp decline occurs in southern hemispheres in the spring. During Antartic winters, the clouds in stratosphere forms as the temperature drops to much lower level providing conditions favourable for chemical changes that promote production of chemically active bromine and chlorine . As this happens, the sunlight combines with these two entities leading to a rapid ozone loss and a reduced level of ozone in poles.


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South pole and north pole are very cold so ozone here is more dense about 4mm
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