IPCC — Intergovernmental Panel On Climate Change

IPCC-64 Seventh Assessment Report

Through its assessments, the IPCC determines the state of knowledge on climate change. It identifies where there is agreement in the scientific community on topics related to climate change, and where further research is needed. The reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.  The IPCC does not conduct its own research. IPCC reports are neutral, policy-relevant but not policy-prescriptive.  The assessment reports are a key input into the international negotiations to tackle climate change. Created by the United Nations Environment Programme (UN Environment) and the World Meteorological Organization (WMO) in 1988, the IPCC  has 195 Member countries. In the same year, the UN General Assembly endorsed the action by WMO and UNEP in jointly establishing the IPCC.

Follow

Engage

There are many ways to engage with the IPCC

Learn More

Clear Grid List

Expert Meetings & Workshops

IPCC Workshop on Engaging Diverse Knowledge Systems and IPCC Workshop on Methods of Assessment

February 10, 2026

Explore

Lead Author Meetings

Joint First Lead Author Meeting for Working Groups I, II and III

December 1, 2025

Explore

Other Event

WCRP/IPCC Co-sponsored Workshop on Earth System High Impact Events, and Tipping Points and their Consequences

November 26, 2025

Explore

UNFCCC

IPCC at UNFCCC COP30

November 10, 2025

Explore

Meeting

Opening of the Sixty-third Session of the IPCC

October 27, 2025

Explore

Expert Meetings & Workshops

IPCC Expert Meeting on Gender, Diversity, Equity, and Inclusivity

September 23, 2025

Explore Load More

Sixth Assessment Report: 2023

Synthesis Report

AR6 Synthesis Report: Climate Change 2023

March 2023

Working Group Report

AR6 Climate Change 2022: Impacts, Adaptation and Vulnerability

February 2022

Working Group Report

AR6 Climate Change 2022: Mitigation of Climate Change

April 2022

Working Group Report

AR6 Climate Change 2021: The Physical Science Basis

August 2021

Special and Methodology Reports

Special Report

Special Report on Climate Change and Cities

March 2027

Working Group Report

2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers

December 2027

Working Group Report

2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization, and Storage for National Greenhouse Gas Inventories (Additional guidance)

December 2027

Working Group Report

Global Warming of 1.5°C

October 2018

Fifth Assessment Report: 2014

Synthesis Report

AR5 Synthesis Report: Climate Change 2014

October 2014

Working Group Report

AR5 Climate Change 2013: The Physical Science Basis

September 2013

Working Group Report

AR5 Climate Change 2014: Impacts, Adaptation, and Vulnerability

March 2014

Working Group Report

AR5 Climate Change 2014: Mitigation of Climate Change

April 2014

Fourth Assessment Report: 2007

Synthesis Report

AR4 Climate Change 2007: Synthesis Report

September 2007

Working Group Report

AR4 Climate Change 2007: The Physical Science Basis

June 2007

Working Group Report

AR4 Climate Change 2007: Impacts, Adaptation, and Vulnerability

July 2007

Working Group Report

AR4 Climate Change 2007: Mitigation of Climate Change

June 2007

Third Assessment Report: 2001

Synthesis Report

TAR Climate Change 2001: Synthesis Report

October 2001

Working Group Report

TAR Climate Change 2001: The Scientific Basis

January 2001

Working Group Report

TAR Climate Change 2001: Impacts, Adaptation, and Vulnerability

May 2001

Working Group Report

TAR Climate Change 2001: Mitigation

July 2001

Second Assessment Report: 1995

Synthesis Report

SAR Climate Change 1995: Synthesis Report

October 1995

Working Group Report

SAR Climate Change 1995: The Science of Climate Change

February 1995

Working Group Report

SAR Climate Change 1995: Impacts, Adaptations and Mitigation of Climate Change: Scientific-Technical Analyses

July 1995

Working Group Report

SAR Climate Change 1995: Economic and Social Dimensions of Climate Change

July 1995

First Assessment Report: 1990

Synthesis Report

FAR Climate Change: Synthesis

March 1990

Working Group Report

FAR Climate Change: Scientific Assessment of Climate Change

June 1990

Working Group Report

FAR Climate Change: Impacts Assessment of Climate Change

July 1990

Working Group Report

FAR Climate Change: The IPCC Response Strategies

October 1990

Special Report

Special Report

The Ocean and Cryosphere in a Changing Climate

September 2019

Working Group Report

Global Warming of 1.5°C

October 2018

Working Group Report

Climate Change and Land

August 2019

Special Report

Aviation and the Global Atmosphere

March 1999

Methodology Report

Working Group Report

2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers

December 2027

Working Group Report

2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization, and Storage for National Greenhouse Gas Inventories (Additional guidance)

December 2027

Methodology Report

1994 IPCC Guidelines for National Greenhouse Gas Inventories

May 1994

Clear

Working Group I

The IPCC Working Group I aims at assessing the physical scientific basis of the climate system and climate change.

August 2017

Explore

Working Group II

The IPCC Working Group II assesses the vulnerability of socio-economic and natural systems to climate change, negative and positive consequences …

January 2018

Explore

Working Group III

The IPCC Working Group III (WG III) assesses options for mitigating climate change through limiting or preventing greenhouse gas emissions …

August 2017

Explore

TFI

The Task Force on National Greenhouse Gas Inventories (TFI) was established by the IPCC to oversee the IPCC National Greenhouse …

November 2016

Explore Search for:

Reports

Special and Methodology Reports

• 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers
• Special Report on Climate Change and Cities
• 2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization, and Storage for National Greenhouse Gas Inventories (Additional guidance)
• Global Warming of 1.5°C
• Climate Change and Land
• 2019 Refinement to the 2006 IPCC Guidelines for National Greenhouse Gas Inventories
• The Ocean and Cryosphere in a Changing Climate

Sixth Assessment Report

• AR6 Synthesis Report: Climate Change 2023
• AR6 Climate Change 2022: Impacts, Adaptation and Vulnerability
• AR6 Climate Change 2022: Mitigation of Climate Change
• AR6 Climate Change 2021: The Physical Science Basis

Fifth Assessment Report

• AR5 Synthesis Report: Climate Change 2014
• AR5 Climate Change 2013: The Physical Science Basis
• AR5 Climate Change 2014: Impacts, Adaptation, and Vulnerability
• AR5 Climate Change 2014: Mitigation of Climate Change

Working Groups

Working Group I

• About
• Reports
• Resources
• Activities
• News
• Co-Chairs
• Vice Chairs
• TSU Staff
• Contact

Working Group II

• About
• Reports
• Activities
• News
• Co-Chairs
• Vice-Chairs
• TSU Staff
• Contact

Working Group III

• About
• Reports
• Activities
• News
• Co-Chairs
• Vice-Chairs
• TSU Staff
• Contact

TFI

• About
• Methodology Reports
• Activities
• IPCC Inventory software
• Emission Factor Database
• TFI Governance
• TFB Co-Chairs
• TFB Members
• TSU Staff
• Contact

Activities

Press Release

IPCC opens registration of experts to review the first draft of the Methodology Report on Inventories for Short-lived Climate Forcers

GENEVA, December 5 – The Intergovernmental Panel on Climate Change (IPCC) opened this week registration for experts to serve as …

December 2025

Explore

Lead Author Meetings

Chair’s remarks – First Lead Author Meeting, Working Groups I, II & III

1 December 2025 CHECK AGAINST DELIVERY Madame la Ministre, Monsieur le Maire, distinguished colleagues, ladies and gentlemen, Thank you for …

December 2025

Explore

Press Release

IPCC authors meet in Paris to begin drafting the Seventh Assessment Report

Paris, Dec 1 – More than six hundred experts appointed to the three Working Groups of the Intergovernmental Panel on …

December 2025

Explore