Fourth Assessment Report (AR4)

Working Group II Report "Impacts, Adaptation and Vulnerability"


Contribution of Working Group II to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, 2007

M.L. Parry, O.F. Canziani, J.P. Palutikof, P.J. van der Linden and C.E. Hanson (eds)

Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. 976 pp


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Consistent with all IPCC reports, the WGII contribution to the Fourth Assessment Report was a comprehensive assessment of the peer-reviewed published literature and selected gray literature on climate change impacts, adaptation, and vulnerability.
The Report
Two Scoping Meetings to outline 20 Chapters
176 Lead Authors and 46 Review Editors from 72 countries
232 Contributing Authors from 48 countries
Over 8,000 peer-reviewed publications cited
The Summary for Policymakers was approved line-by-line by all WMO and UN member governments participating in the WG approval session
The Reviews
Over 40,000 comments from:
1181 Expert Reviewers, from 92 countries
41 Governments
WGII AR4 Drafts, Review Comments and Author Team Responses are available here

Terms and Conditions for Use of Material in the Report

Readers may view, browse and/or download material for temporary copying purposes only, provided these uses are for noncommercial personal purposes. Except as provided by law, this material may not be further reproduced, distributed, transmitted, modified, adapted, performed, displayed, published, or sold in whole or in part, without prior written permission from the Intergovernmental Panel on Climate Change (IPCC).

Fourth Assessment Draft Chapters and Reviews

In accordance with the Principles Governing IPCC Work, information on drafts of the contribution of Working Group II to the IPCC Fourth Assessment process, and review comments on these drafts are available here for the duration of the AR5. The draft and comment files provided are intended as a record of the process used to prepare the Working Group II report.