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Updated 3 April 2008 

Intergovernmental Panel 

on Climate Change (IPCC)

 

 

 

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The AR4 

Synthesis 

Report

The 

Physical 

Science 

Basis

Impacts, 

Adaptation 

and 

Vulnerability

Mitigation 

of Climate 

Change

The AR4 Synthesis Report

 Full Report

 Summary for Policymakers 

 Order at GCRIO

Working Group I Report "The Physical 

Science Basis"

Working Group I Contribution to the Fourth 

Assessment Report of the IPCC 

Intergovernmental Panel on Climate 

Change. IPCC Fourth Assessment Report on 

scientific aspects of climate change for 

researchers, students, and policymakers. 

Published October 2007.

 Full Report

 Summary for Policymakers 

 Order at GCRIO

Working Group II Report "Impacts, 

Adaptation and Vulnerability"

Working Group II contribution to the Fourth 

Assessment Report of the IPCC 

Intergovernmental Panel on Climate 

Change. IPCC Fourth Assessment Report on 

climate change impacts, adaptation and 

vulnerability for researchers, students, 

policymakers. Published March 2008

 Full Report

 Summary for Policymakers 

 Order at GCRIO

Working Group III Report "Mitigation of 

Climate Change"

Working Group III contribution to the Fourth 

Assessment Report of the IPCC 

Intergovernmental Panel on Climate 

Change. IPCC Fourth Assessment Report on 

the mitigation of climate change for 

researchers, students, and policymakers. 

Published January 2008.

 Full Report

 Summary for Policymakers 

 Order at GCRIO 

More from IPCC

Assessment Reports

Special Reports

Supporting 

Materials

Graphics

Presentations

Speeches

Press Releases

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Announcements

Announcements are posted here as part 

of an overall effort to inform the public 

about U.S. participation in the IPCC. 

Towards New Scenarios for Analysis of 

Emissions, Climate Change, Impacts, and 

Response Strategies. Final report of the 

Intergovernmental Panel on Climate Change 

(IPCC) Expert Meeting, held on 19-21 

September, 2007, in Noordwijkerhout, the 

Netherlands. (link posted 05 March 2009) 

U.S. Department of State Seeks Public 

Comment on Future Work of the 

Intergovernmental Panel on Climate Change.

Federal Register Notice published, with 

comments due via IPCCfuture@climatescience.gov by COB Friday, 29 

February 2008. [comment period now 

closed] (link posted 08 February 2008) 

Towards New Scenarios for Analysis of 

Emissions, Climate Change, Impacts, and 

Response Strategies. Report of the 

Intergovernmental Panel on Climate Change 

(IPCC) Expert Meeting, held on 19-21 

September, 2007, in Noordwijkerhout, the 

Netherlands. Available for expert review until 

23 January 2008. [comment period now 

closed] (posted 3 January 2008) 

Summary for Policymakers of the IPCC Fourth 

Assessment Synthesis Report

[PDF]. Released 17 November 2007. See 

also: Press Briefing Via Conference Call by 

Senior Administration Officials on IPCC 

Report, transcript issued by the White House 

Office of the Press Secretary on 16 November 

2007. (link posted 19 Nov 2007) 

Frequently Asked Questions from the IPCC's 

"Climate Change 2007: The Physical Science 

Basis." Nineteen FAQs (each as a separate 

PDF file) from the Contribution of Working 

Group I to the Fourth Assessment Report of 

the Intergovernmental Panel on Climate 

Change, first published in 2007 (link posted 

29 Aug 2007) 

Climate Change 2007: Impacts, Adaptation 

and Vulnerability. The Working Group II 

contribution to the Fourth Assessment Report 

of the Intergovernmental Panel on Climate 

Change. The report includes Chapter 14 on 

North America. (link posted 6 August 2007) 

Available upon request: U.S. Government 

comments on the Intergovernmental Panel on 

Climate Change (IPCC) Fourth Assessment 

Synthesis Report. To obtain a copy, please 

submit a request to ddokken@usgcrp.gov . 

(this notice was posted 24 July 2007). The 

comments are derived from an expert review 

process announced in a Federal Register 

notice published on 21 May 2007. 

Now available from Working Group I (links 

posted 5 July 2007): 

US Climate Change Science Program, Suite 250, 1717 Pennsylvania Ave, NW, W

Email: information@climatescience.gov. Web: www.climatescience.gov

Intergovernmental Panel on Climate Change Page 2 of 7

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 Powerpoint files containing the figures

from the Summary for Policymakers 

(SPM), Technical Summary (TS), and 

individual chapters of Working Group I's 

contribution to the Fourth Assessment 

Report (Climate Change 2007: The 

Physical Science Basis) 

 Files containing reviewers' comments 

and the authors' responses to those 

comments 

Request for expert review of Climate Change 

2007: Synthesis Report. The U.S. Climate 

Change Science Program requests expert 

review of this fourth and final volume of the 

Intergovernmental Panel on Climate Change 

(IPCC) Fourth Assessment Report. 

Comments were due 27 June 2007 

[comment period now closed]. See also the 

Federal Register notice (dtd 21 May 2007) 

United States Joins In Approving Summary 

Report on Climate Change Mitigation. Media 

note (4 May 2007) from the U.S. Department 

of State.See also: Climate Change 2007: 

Mitigation of Climate Change, links to 

information related to the Contribution of 

Working Group III to the Fourth Assessment 

Report of the Intergovernmental Panel on 

Climate Change. (posted 9 May 2007) 

International Scientific Panel Approves Report 

on Climate Change Impacts, Adaptation and 

Vulnerability. Panel indicates high confidence 

that “anthropogenic warming over the last 

three decades has had a discernible influence 

on many physical and biological systems” 

Press release (dated 6 April 2007) from the 

U.S. Climate Change Science Program. See 

also: Climate Change 2007: Impacts, 

Adaptation, and Vulnerability. Summary for 

Policymakers, links to information related to 

the Contribution of Working Group II to the 

Fourth Assessment Report of the 

Intergovernmental Panel on Climate Change. 

(posted 6 April 2007) 

U.S. Climate Change Science Program 

Provides Key Contributions to IPCC Fourth 

Assessment, press release (dtd 16 February 

2007) from the U.S. CCSP.(posted 16 

February 2007) 

Climate Change 2007. The Physical Science 

Basis. Links to information related to the 

Contribution of Working Group I to the Fourth 

Assessment Report of the Intergovernmental 

Panel on Climate Change. (link added 2 Feb 

2007) 

Available upon request: U.S. Government 

collation in support of the Expert and 

Government Review of the Intergovernmental 

Panel on Climate Change (IPCC) Working 

Group III Fourth Assessment Report. To 

obtain a copy, please submit a request to 

ddokken@usgcrp.gov . (posted 18 September 

2006). 

Intergovernmental Panel on Climate Change 

(IPCC) Working Group III Contribution to the 

Fourth Assessment Report of the IPCC: 

Government and Expert Review. The secondorder draft of Climate Change 2007: 

Mitigation of Climate Change is available for 

expert and government review. Comments 

were due 23 August 2006 [comment period 

now closed]. The draft report is available 

Intergovernmental Panel on Climate Change Page 3 of 7

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along with instructions and related 

materials. See also Federal Register notice

(dtd 24 July 2006). (links posted 1 August 

2006). 

Available upon request: U.S. Government 

collation in support of the Expert and 

Government Review of the Intergovernmental 

Panel on Climate Change (IPCC) Working 

Group II Fourth Assessment Report. To 

obtain a copy, please submit a request to 

ddokken@usgcrp.gov . (posted 25 July 

2006). 

Available upon request: U.S. Government 

collation in support of the Expert and 

Government Review of the Intergovernmental 

Panel on Climate Change (IPCC) Working 

Group I Fourth Assessment Report. To obtain 

a copy, please submit a request to 

ddokken@usgcrp.gov . (posted 13 June 

2006). 

Intergovernmental Panel on Climate Change 

(IPCC) Working Group II Contribution to the 

Fourth Assessment Report of the IPCC: 

Government and Expert Review. The secondorder draft of Climate Change 2007: Impacts, 

Adaptation, and Vulnerability is available for 

expert and government review. Comments 

are due 28 June 2006. The draft report is 

available along with instructions and related 

materials. See also Federal Register notice

(dtd 26 May 2006). (links posted 26 May 

2006).[Note: The comment period is closed and 

the draft report no longer is available.]

Intergovernmental Panel on Climate Change 

(IPCC) Working Group I Contribution to the 

Fourth Assessment Report of the IPCC: 

Government and Expert Review. The secondorder draft of Climate Change 2007: The 

Physical Science Basis is available for expert 

and government review. The draft report is 

available along with instructions and related 

materials. Comments were due 9 May 2006 

[comment period now is closed] . See also 

Federal Register notice (dtd 7 April 2006). 

(posted 7 April 2006). 

Invitation for Expert Review of First Order Draft, 

IPCC Working Group III Fourth Assessment Report. 

[PDF] Invitation from Working Group co-chairs, Bert 

Metz and Ogunlade Davidson. The draft report is 

available for review by experts from 28 November 

2005 until 20 January 2006. If you wish to review 

the report, please notify the IPCC via email at

ipcc3tsu@mnp.nl, noting your contact details and 

your area of expertise. (posted 12 January 2006) 

Intergovernemental Panel on Climate 

Change (IPCC) Working Group (WG) I 

First Order Draft Review. The First Order 

Draft of the WG I report is available for 

expert review from 12 September to 4 

November 2005. If you would like to review 

this draft and have not already provided IPCC 

Working Group I with your contact details 

please register. [Update: Registration CLOSED 

on 21 Oct. 2005. Reviews are due Friday, 4 Nov. 

2005.] 

Intergovernemental Panel on Climate 

Change (IPCC) Working Group II First 

Order Draft Review. The First Order draft 

of the WG II report is available for expert 

review from 12 September to 4 November 

2005. If you would like to review this draft 

and have not already provided your contact 

Intergovernmental Panel on Climate Change Page 4 of 7

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details to IPCC Working Group II, please 

inform the Technical Support Unit at ipccwg2@metoffice.gov.uk. 

Start of Government/Expert Review of 2006 

IPCC Guidelines for National Greenhouse Gas 

Inventories. Letter (dtd 12 September 2005) 

to expert reviewers from Thelma Krug and 

Taka Hiraishi (Co-Chairs, Task Force Bureau, 

National Greenhouse Gas Inventories 

Programme, Intergovernmental Panel on 

Climate Change [IPCC]). The letter invites 

reviewers to contribute to the Expert Review 

of the Second Order Draft of the 2006 IPCC 

Guidelines for National Greenhouse Gas 

Inventories (2006 Guidelines). The review 

started on 12 

September 2005 and lasts for eight weeks 

until 7 November. (posted 4 October 2005) 

IPCC Special Report on Carbon Dioxide Storage 

and Capture, U.S. Government Review. Invitation 

to comment on the draft special report from the 

Intergovernmental Panel on Climate Change 

(IPCC), Working Group III. Page includes links to 

instructions and to drafts. To have comments 

considered as part of the official U.S. position, all 

U.S. expert comments must be sent to CCSPO at 

srccs-USGreview@climatescience.gov by COB 23 

February 2005. See also Federal Register Notice, 

25 January 2005. [comment period closed on 23 

Feb 2005] (links posted 13 January 2005) 

IPCC/TEAP Special Report on Safeguarding the 

Ozone Layer and the Global Climate System: Issues 

Related to Hydrofluorocarbons and 

Perfluorocarbons. U.S. Government Review. Draft 

special report from the Intergovernmental Panel on 

Climate Change (IPCC) and the Technology and 

Economic Assessment Panel (TEAP). The report, 

posted for review, assesses scientific and technical 

information related to alternatives to ozonedepleting substances. The draft was open for 

comments until 2 November 2004. [review period now 

closed] See also Federal Register Notice, dated 29 

September 2004. (links updated 29 September 

2004) 

21-23 September 2004. Tokyo, Japan. IPCC 

Expert Meeting on Industrial Technology 

Development, Transfer and Diffusion. 

Sponsor: Intergovernmental Panel on Climate 

Change, Working Group III. Contact: John 

Kessels, Technical Support Unit Working 

Group III, p/o ECN, Badhuisweg 3 / P.O. Box 

37154, 1030 AD Amsterdam, THE 

NETHERLANDS. Tel: +31-224-564882. Fax 

+31-20-4922812. Email: Kessels@ecn.nl 

Scientific Workshop on Climate Sensitivity 

(Paris, France, on 26-29 July 2004). 

Announcement (dtd 6 October 2003) from 

the IPCC, sent to Foreign Affairs ministries. 

Governments had until 24 November 2003 to 

nominate experts to participate in the 

workshop. Though the deadline has passed, 

this announcement is posted here as part of 

an overall effort to inform the public about 

U.S. participation in the IPCC. In the future, 

we will seek to promptly post such 

announcements on this page. 

Call for U.S. Nominations to serve as 

Authors and/or Reviewers of the IPCC 

Fourth Assessment Report (AR4). Note: 

The deadline for nominations was 

12:00 noon on Monday January 5, 

2004. The U.S. government no longer 

is accepting nominations. Issued by the 

Intergovernmental Panel on Climate Change Page 5 of 7

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Other Documents:

Principles Governing IPCC Work.[PDF] 

Approved at the Fourteenth Session (Vienna, 

1-3 October 1998) on 1 October 1998 

Appendix A. Procedures for the 

Preparation, Review, Acceptance, 

Adoption, Approval and Publication 

of IPCC Reports. [PDF] Adopted at 

the Fifteenth Session of the IPCC 

(San Jose, 15-18 April 1999) and 

revised, on a provisional basis, at 

the Twentieth Session of the IPCC 

(Paris, 19-21 February 2003). 

Appendix B. Financial Procedures 

for the Intergovernmental Panel on 

Climate Change (IPCC). [PDF] 

U.S. Climate Change Science Program on 

behalf of the U.S. Department of State on 4 

December 2003. 

Invitation letters from IPCC

 Letter from Acting Secretary of the 

IPCC (R. Christ) (dtd 26 Nov 2003), to 

national governments inviting 

nominations of experts [also available 

as PDF file] for consideration as 

Coordinating Lead Authors, Lead 

Authors, Contributing Authors, Expert 

Reviewers or Review Editors for the 

different chapters of the Fourth 

Assessment Report (AR4) of the 

Intergovernmental Panel on Climate 

Change (IPCC). 

 Letter from Acting Secretary of the 

IPCC (R. Christ) (dtd 26 Nov 2003), to 

organizations inviting nominations of 

experts [PDF] for consideration as 

Coordinating Lead Authors, Lead 

Authors, Contributing Authors, Expert 

Reviewers or Review Editors for the 

different chapters of the Fourth 

Assessment Report (AR4) of the 

Intergovernmental Panel on Climate 

Change (IPCC). 

Attachments to IPCC invitation letters: 

 Attachment 1. Outlines for the IPCC 

Working Group Contributions to the 

Fourth Assessment Report, Climate 

Change 2007. [also available as PDF 

file] The IPCC Working Groups adopted 

at their Plenary Sessions (Vienna, 

Austria, 4-5 November 2003) the 

outlines for their contributions to the 

AR4. Subsequently the Panel at its 

twenty first session (Vienna, Austria, 3 

and 6-7 November 2003) accepted the 

overall outline and the 

workprogramme for the Fourth 

Assessment Report. 

 Attachment 2. Tasks and 

Responsibilities for Lead Authors, 

Coordinating Lead Authors, 

Contributing Authors, Expert 

Reviewers and Review Editors of IPCC 

Reports and Government Focal Points.

[also available as PDF file] 

 Attachment 3. Nomination Form for 

the IPCC Fourth Assessment Report

[MS WORD] Also available as PDF 

file. 

Intergovernmental Panel on Climate Change Page 6 of 7

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Originally adopted at the Twelfth 

Session of the IPCC (Mexico City, 

11-13 September 1996) 

Intergovernmental Panel on Climate Change Page 7 of 7

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