Figure 1 – Presence of CFC-113 per picomole in Cape Grim, Australia. Sourced from NOAA Global Monitoring Laboratory.

The plot presented shows how much of CFC-113, a type of CFC is present in Cape Grim, Australia. This data was collected over a period of 30 years, from 1991 to 2021. This data is collected using Flask Samples, when air is stored into flasks and then further experimented on.

CFCs are responsible for depleting the ozone layer in the stratosphere, an essential shield against the harmful rays of the UV rays that come from the Sun. As such, it is important to measure the presence of such gasses in the atmosphere. An increase in atmospheric CFC is a concern for ozone depletion.

This specific data trend shows that in Cape Grim, the presence of CFCs has been on a decline for the last two decades. It is notable that the peak happened in around 1995 and has been on a decline ever since then. This data is important because it shows that, over a period of time, the presence of CFC-113 has gone down in this specific area, meaning that the ozone layer is largely preserved.