Scientific Assessment of Ozone Depletion 2022: Twenty Questions and Answers About the Ozone Layer

Twenty Q&As About the Ozone Layer Downloads

The complete Twenty Questions and Answers About the Ozone Layer: 2022 Update is available as a PDF download. In addition, all figures are available for download in png file format, optimal for print or screen. Figures from this report are in the public domain and may be used without permission. Attribution to this document is encouraged.

Example figure citation:

Figure Q1-1: Ross J. Salawitch (Lead Author), Laura A. McBride, Chelsea R. Thompson, Eric L. Fleming, Richard L. McKenzie, Karen H. Rosenlof, Sarah J. Doherty, David W. Fahey, Twenty Questions and Answers About the Ozone Layer: 2022 Update, Scientific Assessment of Ozone Depletion: 2022, 75 pp., World Meteorological Organization, Geneva, Switzerland, 2023.

	PDF	Figures
Twenty Questions and Answers About the Ozone Layer: 2022 Update		-
Cover, Preface
Introduction
Q1: What is ozone, how is it formed, and where is it in the atmosphere?
Q2: Why do we care about atmospheric ozone?
Q3: How is total ozone distributed over the globe?
Q4: How is ozone measured in the atmosphere?
Q5: How do emissions of halogen source gases lead to stratospheric ozone depletion?
Q6: What emissions from human activities lead to ozone depletion?
Q7: What are the reactive halogen gases that destroy stratospheric ozone?
Q8: What are the chlorine and bromine reactions that destroy stratospheric ozone?
Q9: Why has an "ozone hole" appeared over Antarctica when ozone-depleting substances are present throughout the stratosphere?
Q10: How severe is the depletion of the Antarctic ozone layer?
Q11: Is there depletion of the Arctic ozone layer?
Q12: How large is the depletion of the global ozone layer?
Q13: Do changes in the Sun and volcanic eruptions affect the ozone layer?
Q14: Are there controls on the production of ozone-depleting substances?
Q15: Has the Montreal Protocol been successful in reducing ozone-depleting substances in the atmosphere?
Q16: Does depletion of the ozone layer increase ground-level ultraviolet radiation?
Q17: Is depletion of the ozone layer the principal cause of climate change?
Q18: Are Montreal Protocol controls of ozone-depleting substances also helping protect Earth's climate?
Q19: How has the protection of climate by the Montreal Protocol expanded beyond the regulation of ozone-depleting substances?
Q20: How is stratospheric ozone expected to change in the coming decades?
Terminology		-
Chemical Formulae and Nomenclature		-
Authors and Contributors		-

Twenty Q&As About the Ozone Layer Downloads

Twenty Questions and Answers About the Ozone Layer: 2022 Update

Cover, Preface

Introduction

Q1: What is ozone, how is it formed, and where is it in the atmosphere?

Q2: Why do we care about atmospheric ozone?

Q3: How is total ozone distributed over the globe?

Q4: How is ozone measured in the atmosphere?

Q5: How do emissions of halogen source gases lead to stratospheric ozone depletion?

Q6: What emissions from human activities lead to ozone depletion?

Q7: What are the reactive halogen gases that destroy stratospheric ozone?

Q8: What are the chlorine and bromine reactions that destroy stratospheric ozone?

Q9: Why has an "ozone hole" appeared over Antarctica when ozone-depleting substances are present throughout the stratosphere?

Q10: How severe is the depletion of the Antarctic ozone layer?

Q11: Is there depletion of the Arctic ozone layer?

Q12: How large is the depletion of the global ozone layer?

Q13: Do changes in the Sun and volcanic eruptions affect the ozone layer?

Q14: Are there controls on the production of ozone-depleting substances?

Q15: Has the Montreal Protocol been successful in reducing ozone-depleting substances in the atmosphere?

Q16: Does depletion of the ozone layer increase ground-level ultraviolet radiation?

Q17: Is depletion of the ozone layer the principal cause of climate change?

Q18: Are Montreal Protocol controls of ozone-depleting substances also helping protect Earth's climate?

Q19: How has the protection of climate by the Montreal Protocol expanded beyond the regulation of ozone-depleting substances?

Q20: How is stratospheric ozone expected to change in the coming decades?

Terminology

Chemical Formulae and Nomenclature

Authors and Contributors