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Twenty Questions and Answers About the Ozone Layer: 2014 Update
  • Published Date:
    2014
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Twenty Questions and Answers About the Ozone Layer: 2014 Update
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  • Description:
    To help maintain a broad understanding of the relationship between ozone depletion, ODSs, and the Montreal Protocol, this component of the Scientific Assessment of Ozone Depletion: 2014 presents 20 questions and answers about the often-complex science of ozone depletion. Most questions and answers are updates of those presented in previous Ozone Assessments, and a few have been expanded to address newly emerging issues. The questions address the nature of atmospheric ozone, the chemicals that cause ozone depletion, how global and polar ozone depletion occur, the extent of ozone depletion, the success of the Montreal Protocol, and the possible future of the ozone layer. Computer models project that the influence on global ozone of greenhouse gases and changes in climate will grow significantly in the coming decades and exceed the importance of ODSs in most atmospheric regions by the end of this century. Ozone and climate are indirectly linked because both ODSs and their substitutes are greenhouse gases and contribute to climate change. The Antarctic ozone hole has recently been shown also to have had a direct effect on Southern Hemisphere surface climate during summer. A brief answer to each question is first given in blue; an expanded answer then follows. The answers are based on the information presented in the 2014 and earlier Assessment reports as well as other international scientific assessments. These reports and the answers provided here were prepared and reviewed by a large number of international scientists who are experts in different research fields related to the science of stratospheric ozone and climate

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