An Ongoing International Collaboration: The WMO/UNEP Scientific Assessments of Ozone Depletion

International Scientific Assessments of Ozone Depletion. An international agreement known as the "Montreal Protocol on Substances That Deplete the Ozone Layer" was reached in 1987. Through that agreement, and subsequent amendments and adjustments in 1990 and 1992 and adjustments in 1995 and 1998, many nations of the world have carried out policies to reduce and then phase out their use of ozone-depleting chemicals. The Montreal Protocol also called for the international scientific community to periodically update governments on the latest scientific findings related to the ozone layer. Conducted under the auspices of the World Meteorological Organization (WMO) and the United Nations Environment Programme (UNEP) and co-sponsored by NASA, NOAA, and other organizations, these periodic "state-of-the-science" assessments have guided policymakers as they strengthened the original provisions of the Montreal Protocol. Together with colleagues at NASA, other NOAA laboratories, and other scientific institutions across the U.S. and around the world, the Aeronomy Laboratory has played a leading role in preparing these assessments (1985, 1988, 1991, 1994, 1998, and 2002). The Executive Summary of the most recent assessments (1994, 1998, and 2002) are available here.

• WMO/UNEP Scientific Assessment of Ozone Depletion: 2002
  • Titles and Lead Authors of the 5 Chapters of the full report
  • List of International Authors, Contributors, and Reviewers of the Assessment
  • Text of the Executive Summary
  • "Twenty Questions and Answers About the Ozone Layer"

• WMO/UNEP Scientific Assessment of Ozone Depletion: 1998
  • Text of the Executive Summary
  • "Frequently Asked Questions About Ozone"
  • List of International Authors, Contributors, and Reviewers of the Assessment
  • Titles and Lead Authors of the 12 Chapters of the full report

• WMO/UNEP Scientific Assessment of Ozone Depletion: 1994
  • Text of the Executive Summary
  • "Common Questions About Ozone"
  • List of International Authors, Contributors, and Reviewers of the Assessment
  • Titles and Lead Authors of the 13 Chapters of the full report