Arctic ozone depletion chemical processes

The chemical processes involved in depletion of lower stratospheric ozone are now fairly well understood [8]. However, 3-dimensional chemical transport models still under-predict ozone loss in the Arctic, where the winterly polar vortex is less stable compared to its Antarctic counterpart, temperatures in the lower... 

The presence of this hyperdense H-bond network also gives ice a particular chemical reactivity on its surface, which is characterized by the presence of numerous potential H-bond acceptors or donors that do not establish H-bonds. It thus has a central role in the seasonal ozone depletion that occurs mainly over the Antarctic, but also over the Arctic, where this type of PSCs that are made of ice Ih, called II PSC, play a fundamental catalytic role to transform inert chlorinated gas molecules into Cl or CIO radicals that attack and destroy O3. Much work still remains to be done to fully understand this catalytic process. Singular properties of ice are thus a direct consequence of the presence of such a dense H-bond network. This network is rigid. Its transformation in liquid water into an as dense but flexible H-bond network has dramatic consequences, giving liquid water numerous exceptional properties. This is the object of Ch. 9. 

Arctic ozone losses and test photochemical understanding. These models have succeeded in explaining much of the observed ozone depletion, documenting its connections to chemical processes, and even reproducing much of the observed variability seen from one year to another (see e.g., Chipperfield et al., 4994 4996 Chipperfield and Pyle, 1998 Deniel et al., 1998 Douglass et al., 1995). 

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