Antarctic 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. 

The book is intended to provide an overview in a manner understandable to persons familiar with college level chemistry and physics. After a general introduction presented in Chapter 1, Chapter 2 reviews basic concepts from physical chemistry, which are of relevance to atmospheric studies. Chapter 3 presents a highly simplified view of dynamical and transport processes above the tropopause, and Chapter 4 summarizes important aspects of radiative transfer in relation to the energy budget and photolytic processes in the middle atmosphere. Chapter 5 presents an overview of the key chemical processes, which influence the chemical composition of the middle atmosphere, while Chapter 6 discusses human-induced perturbations affecting ozone and other compounds. The chapter also presents a detailed discussion of ozone depletion, particularly the formation of the spectacular Antarctic... 

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