Sources of tropospheric ozone 1.
Ozone is supplied to the troposphere by transport from the stratosphere.
Calculate the net source of tropospheric O 3 contributed by transport from the stratosphere. We repeat this calculation here. Using your results from question 2.1, estimate the global production rate of ozone in the troposphere. Explain how the approach you used in question 2.2 might be expected to overestimate the production rate of ozone. 2.4 Conclude as to the relative importance of transport from the stratosphere and production within the troposphere as sources of tropospheric ozone.