Scientific Assessment Panel (SAP)

The Scientific Assessment Panel (SAP) assesses the status of the depletion of the ozone layer and relevant atmospheric science issues. Pursuant to Article 6 of the Montreal Protocol on Substances that Deplete the Ozone Layer, a report is prepared every three or four years by the SAP which consists of hundreds of top scientists from around the world. Any emerging scientific issues of importance are brought to the attention of the Parties by the SAP Co-Chairs for consideration at the Meetings of the Parties.


Preparation of the Scientific Assessment of Ozone Depletion reports

The four panel Co-Chairs, with input from an ad-hoc international steering group of researchers plan the scope, content, and authors of the assessment reports. The Co-Chairs and the relevant set of lead authors meet to plan and coordinate the contents of the chapters and the preparation of first drafts. The authors are aided by information contributed by a large body of researchers worldwide. The resulting drafts undergo peer review (with several reviewers per chapter) and a subsequent weeklong panel review, at which the chapter conclusions are agreed upon and the Executive Summary is finalized.

The Executive Summary for the 2010 report was published in September 2010 and the full report was published in January 2011. Each report contains a full list of the lead authors, the authors, the contributors and the reviewers.


Dr. A. R. Ravishankara
Chemistry and Atmospheric Science
Colorado State Universiry
Fort Collins
Colorado 80523
Tel: (+970) 491-1101 or 491-6444

Prof. Ayite-Lo Nohende Ajavon
Head Atmospheric Chemistry Laboratory
FDS/Universite de Lome
UNEP Scientific Assessment Panel (SAP)
BP. 1515
Tel: (+228) 226 9170
Fax: (+228) 221 8595

Prof. John Pyle
Centre for Atmospheric Science
Chemistry Department
Cambridge University
Cambridge CB2 1EW
United Kingdom
Fax: + 44 (01223) 336362

Dr. Paul A. Newman
Chief Scientist for Atmospheres
Earth Sciences Division
National Aeronautics and Space Administration
Code 610
Goddard Space Flight Center
Greenbelt, MD 20771


View the list of members

Progress & Quadrennial Assessment Reports

  • SAP
Quadrennial Assessment Reports
Scientific Assessment of Ozone Depletion: 2010 - 2011
Twenty Questions and Answers About the Ozone Layer: 2010 Update - 2011
Executive Summary of the Scientific Assessment of Ozone Depletion: 2010(WMO/UNEP) - 2010
Report of 2006 Assessment of the Scientific Assessment Panel - 2006
Executive Summary of the Scientific Assessment of Ozone Depletion: 2006 (WMO/UNEP), 18 August 2006 - 2006
Background document: Executive Summary, Scientific Assessment of Ozone Depletion: 2006 - 2006

View all documents


Environmental Effects Assessment Panel
Scientific Assessment Panel
Technology and Economic Assessment Panel
Chemicals Technical Options Committee
Flexible and Rigid Foams Technical Options Committee
Halons Technical Options Committee
Medical Technical Options Committee
Methyl Bromide Technical Options Committee
Refrigeration, Air Conditioning and Heat Pumps Technical Options Committee
Replenishment Task Force (XXV/8)
Task Force on Decision XXV/5