We are involved primarily in measuring atmospheric composition, and that has very important impacts on both global climate change and severe weather. The ozone layer, for example, is the primary engine of the atmosphere. It is where most of the energy goes in, so understanding what it's doing is of great importance.
The severe weather aspect of it is done more by our colleagues at Environment Canada. They are in the midst of setting up a site outside of Iqaluit to help improve the predictions for blizzards, in particular, in the Arctic.
The atmosphere is one well-connected entity, if you will. Everything that effects it ends up effecting everything in it.