Thesis (M. Sc)--York University, 2000. Graduate Programme in Physics and Astronomy. / Typescript. Includes bibliographical references (leaves 128-135). Also available on the Internet. MODE OF ACCESS via web browser by entering the following URL: http://wwwlib.umi.com/cr/yorku/fullcit?pMQ59206.

The aim of this thesis is to describe the complete view of protection of the ozone layer. Therefore, it contains information about international, european and national legislation in this area. In addition, international legal aspects of climate change are mentioned. Finally, both ozone regime and climate change regime are compared. The author pays attention to the advantages and disadvantages of legal instruments and tries to find ways how to use ozone legal instruments in climate protection.

Resumé: Protection of the ozone layer of the Earth from the perspective of law This thesis is dealing with protection of the ozone layer. I chose this topic because I consider ozone layer as a very important folder of the environment and its weakening is of global nature and for its protection it was necessary to involve as many countries as possible. This work is focused mainly on the development of ozone layer protection at the international level and on current legislativ. It also includes the European Union's approach to this problem. In the beginning of my thesis I'm trying to explain what is ozone, which substances deplete the ozone layer and which principles and tools are used for its protection. Chapter two is dedicated to the development of ozone layer protection. It includes the beginnings of the international cooperation which began to take shape in the middle of the 70s when was published the first scientific work, which pointed to damage of ozone layer by halogenated hydrocarbons. International cooperation resulted to the adoption of the Vienna Convention for the Protection of the Ozone Layer and later to its implementation protocol - Montreal protocol, in September of 1987. The Montreal Protocol was considered an exceptional success of diplomacy in the sphere of environmental protection but in...

Halogen chemistry plays an important role in spring time ozone and mercury depletion events (ODEs and MDEs) and may efficiently oxidize hydrocarbons such as the important greenhouse gas methane (CH4) in the polar marine boundary layer. This thesis presents a detailed study of bromine and chlorine chemistry in the Arctic boundary layer based on measurements of bromine and chlorine containing species using chemical ionization mass spectrometry (CIMS). The capability of CIMS to accurately measure bromine oxide (BrO) was demonstrated. The first direct measurements of hypobromous acid (HOBr) were achieved. Conditions that likely favor bromine activation (e.g. high wind speeds) was presented. To advance the understanding of bromine recycling, a time dependent model was built to simulate the bromine speciation. Unexpected high levels of molecular chlorine (Cl2) were observed at Barrow, AK, which had a large impact on methane oxidation and could contribute to ozone loss and mercury oxidation at Barrow, AK. Moreover, BrO levels observed at Summit, Greenland did not explain the under prediction of hydroxyl radical (OH). However, the enhanced OH was found to be coincident with elevated reactive gaseous mercury (RGM). In addition, airborne BrO measurements were found to be generally consistent with airborne observations of soluble bromide based on the response factors of mist chamber to the bromine species and bromine chemical mechanisms.