Atmospheric chemistry of the polar ozone

Question 1

What is the altitude range of the stratosphere

Answer 1

15-50km

Question 2

how does sunlight produce ozone

Answer 2

sunlight dissasociates O2 and the atoms recombine with O2 to produce )3

Question 3

what families of chemical species can destroy stratospheric ozone

Answer 3

hydrogen
nitrogen
chlorine and
bromine

Question 4

what impact has human activity had on the composition of the stratosphere over 30-40 years

Answer 4

anthropogenic activity has increased the abundance of some ozone destroying families. Mostly chlorine and bromine

Question 5

what are the main anthropogenic ozone depleting substances that have beed emmited

Answer 5

chloroflurocarbons - these and other gases have greatly increased the stratospheric chlorine loading

Question 6

why does the arctic ozone hole appear during spring time

Answer 6

timing is due to the combination of coldd temperatures at the ennd of winter and availibility of sunlight

Question 7

why is there less ozone depletion over the arctic compared to the antartic

Answer 7

winter spring in the arctic polar stratosphere is warmer and more distributed than the antarctic ( the occurance of polar stratospheric clouds is less)