IPCC Working Group I

http://www.climatechange2013.org/background/review-process/[8/18/2015 10:31:00 AM]

Review Process

The multi-stage review process is an important part of an IPCC assessment. In successive stages, expert reviewers and

 governments are invited to comment on the accuracy and completeness of the scientific, technical and socio-economic

 content and the overall balance of the report drafts. The review process includes a very wide circulation among expert

 reviewers and government experts, with hundreds of reviewers checking the accuracy and completeness of the scientific

 assessment contained in the drafts. In the Expert Reviews of the IPCC Fifth Assessment Report, the three WGs

 encouraged as wide a participation of experts as possible, relying on a self-declaration of expertise.

The Expert Review of the First Order Draft of the WG I contribution to the IPCC Fifth Assessment Report: Climate Change

 2013: The Physical Science Basis (WGI AR5) took place from 16 December 2011 to 10 February 2012. Almost 1500

 individuals registered as Expert Reviewers, with 659 reviewers submitting a total of 21,400 review comments. These

 served as the basis for discussions at the Third Lead Author Meeting, which was held in Marrakech, Morocco (16-20 April

 2012).

The Expert and Government Review of the Second Order Draft of the WGI AR5 took place from 05 October to 30

 November 2012. This was the opportunity for experts and governments to comment on the Second Order Draft of the

 chapters and the First Order Draft of the Technical Summary and the Summary for Policymakers. Observer Organizations

 were invited to encourage experts to sign up as expert reviewers. Over 1500 individuals registered as Expert Reviewers.

 The review generated 31,422 comments from 800 experts and 26 governments. These comments served as the basis for

 deliberations at the Fourth Lead Author Meeting, held in Hobart, Tasmania, Australia (13-19 January 2013).

On 07 June 2013, the Final Draft of WGI AR5 was completed, comprising 14 Chapters, 3 Annexes, a Technical Summary

 and a Summary for Policymakers. The Final Draft was made available to the Governments during the Final Government

 Distribution from 07 June to 02 August 2013, The Final Government Distribution provided governments with an opportunity

 to submit written comments on the Final Draft Summary for Policymakers in preparation of the Twelfth Session of Working

 Group I. A total of 1855 comments were received from 32 governments.

In accordance with Article 4.2 of Appendix A to the Principles Governing IPCC Work, all comments submitted as part of the

 formal expert and/or government review together with the author responses will be made available on the WGI AR5 web

 site as soon as possible after finalisation of the report.

Expert Reviewers Countries Governments Comments

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WORKING GROUP I

Climate Change 2013: The Physical Science Basis

1089

REVIEWERS

55

COUNTRIES

38

GOVERNMENTS

54677

COMMENTS
IPCC Working Group I

http://www.climatechange2013.org/background/review-process/[8/18/2015 10:31:00 AM]

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BACKGROUND

Overview

Scoping Meeting

Call for Author Nominations

Lead Author Meetings

Review Process

WGI AR5 Timeline

Expert Meetings and Workshops

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First Order Draft 659 47 21400

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Final Government Distribution 32 1855