Bangkok, March 27 – The 64^th Plenary Session of the Intergovernmental Panel on Climate Change (IPCC) closed in Bangkok this evening. The session discussed the review of the Principles and Procedures that govern IPCC’s work. These should be reviewed every five years and are critical to ensuring the IPCC’s capacity to produce comprehensive, neutral, objective, transparent, inclusive, and robust assessments of climate-related science.

The Panel decided to consider the review of the IPCC Principles and Procedures at future sessions.

During the Plenary, the member governments also decided to consider the timeline of the Seventh Assessment Report (AR7).

While the Panel made no formal decision, the member governments clearly indicated that they want the timeline agreed at its next session.

“In IPCC, we use our best endeavours to achieve consensus. Sometimes, as we pursue our best endeavours, we strive in slightly different directions. But I think the spirit of compromise and flexibility in IPCC was shown in the end,” said IPCC Chair Jim Skea, addressing the delegates in closing the session.

During the four-day session, the Panel also considered the financial situation and fundraising for the IPCC Trust Fund for this cycle and beyond to ensure its long-term sustainability. Supported entirely by voluntary contributions from member governments, the IPCC Trust Fund is the key mechanism enabling participation by developing-country governments and scientists in the IPCC’s work.

The Panel also agreed on the work programme of the Task Group for Data Support for Climate Change Assessments.

The 64^th Plenary Session of the IPCC was also the last one for the IPCC Secretary Abdalah Mokssit, who led the IPCC Secretariat for the past decade, and will retire in the next few months. On this occasion, the delegates, Bureau members, observer organizations, and staff expressed appreciation for the outgoing Secretary’s strong commitment and rich contributions.

For more information, contact:
IPCC Press Office, Email: ipcc-media@wmo.int;
Andrej Mahecic, +41 22 730 8516; Werani Zabula, +41 22 730 8120;

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi.

At its first Plenary Session in the seventh assessment cycle – the 60th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

At the Panel’s most recent Plenary Session in Lima, Peru, in October 2025, member governments agreed on the scientific content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. There, the Panel also agreed on the 2026 workplan for the three Working Group contributions to the Seventh Assessment Report.

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.  

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

For more information visit www.ipcc.ch

BANGKOK, March 24 – The Intergovernmental Panel on Climate Change (IPCC) began its Sixty‑fourth Plenary Session at the United Nations Economic and Social Commission for Asia and the Pacific (UNESCAP) in Bangkok, Thailand, today. Nearly 300 delegates representing IPCC member governments and observer organisations from around the world have gathered to advance IPCC’s planned work in the seventh assessment cycle. The session is scheduled from 24 to 27 March 2026.

A key agenda item for this Session is the review of the Principles and Procedures that govern the work of the IPCC, which are subject to review every five years.

With the Panel now more than two and a half years into the seventh assessment cycle, IPCC Chair Jim Skea, invited member governments to initiate this review at this plenary session and strengthen how the IPCC conducts its business.

“The principles and procedures governing our work are vital in safeguarding IPCC’s ability to deliver comprehensive, neutral, objective, transparent, inclusive, and scientifically robust assessments,” said IPCC Chair Jim Skea during his opening remarks. “The Panel can seize the opportunity presented at this plenary to give this important matter its full and undivided attention,” he added.

During the four-day meeting, the Panel will also discuss raising funds for the IPCC Trust Fund, the work programme of its Task Group for Data Support for Climate Change Assessments, and will consider new observer organisations, among other items. The Panel will also receive progress updates from different parts of the IPCC and various products of the seventh assessment cycle.

The IPCC’s seventh assessment cycle formally began in July 2023 and will culminate in the release of the Synthesis Report to the Seventh Assessment Report (AR7) in 2029. In this cycle, the IPCC will prepare the AR7, comprising three Working Group contributions and a Synthesis Report, and update the 1994 Technical Guidelines for Assessing Climate Change Impact and Adaptation. The Panel will also produce a Special Report on Climate Change and Cities, the Methodology Report on Short-Lived Climate Forcers and the Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilisation and Storage.

During the opening ceremony, delegates were welcomed by the Permanent Secretary of Thailand’s Ministry of Natural Resources and Environment Raweewan Bhuridej. The Plenary was also addressed by the IPCC Chair Jim Skea and the Deputy Secretary General of the World Meteorological Organisation, Ko Barrett. The opening ceremony also included video messages from Inger Andersen, Executive Director of the UN Environment Programme and Simon Stiell, the Executive Director of the United Nations Framework Convention on Climate Change.

Except for the opening session, the IPCC Plenary session is closed to the media.

Media assets from the opening ceremony, including text and video recordings of the speeches, visuals and B-roll , will be available here.

For more information, please contact:
IPCC Press Office, Email: ipcc-media@wmo.int;
Andrej Mahecic, +41 22 730 8516; Werani Zabula, +41 22 730 8120

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi.

At its first Plenary Session in the seventh assessment cycle – the 60th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

At the Panel’s most recent Plenary Session in Lima, Peru, in October 2025, member governments agreed on the scientific content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. There, the Panel also agreed on the 2026 workplan for the three Working Group contributions to the Seventh Assessment Report.

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.  

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

For more information visit www.ipcc.ch

GENEVA, December 5 – The Intergovernmental Panel on Climate Change (IPCC) opened this week registration for experts to serve as Expert Reviewers on the First-Order Draft (FOD) of the 2027 Methodology Report on Inventories for Short-lived Climate Forcers.

This Methodology Report, produced by the Task Force on National Greenhouse Gas Inventories (TFI), will provide guidance on measuring anthropogenic emissions from key short-lived climate-forcing substances, including nitrogen oxides, carbon monoxide, and others, which significantly contribute to global and regional air quality and climate change.

Following the Second Lead Author Meeting held in Istanbul this October, the authors of this Methodology report have prepared a first draft, which will be open for experts worldwide to review and provide comments as of early January 2026.

The review of the First Order Draft is the first of multiple review stages foreseen for every IPCC report. The review process is critical in preparing IPCC reports. It helps ensure scientific rigour, the widest range of perspectives, and relevance and guidance for those who compile emissions inventories.

Scheduled for release in 2027, the Methodology Report on Inventories for Short-lived Climate Forcers will be the first methodology report published by the IPCC in the seventh assessment cycle.

“We have more than 140 authors from 50 countries volunteering their time and expertise to develop the first draft of this long-awaited methodology report. We are now seeking experts worldwide to review and provide their comments, thus ensuring that this methodology report will reflect the latest scientific knowledge,” said Task Force on National Greenhouse Gas Inventories Co-Chair Takeshi Enoki.

Expert Review is the first opportunity for experts to engage with the draft report. All review comments submitted by experts or governments are addressed by the authors. The comments and the author responses, together with the drafts, are published after the report is finalised.

“Engagement of Expert Reviewers is vital. Their insights will help authors to consider diverse perspectives and methodological approaches,” said Task Force on National Greenhouse Gas Inventories Co-Chair Mazhar Hayat.

An online registration process has been developed and is open for prospective expert reviewers via the IPCC web site. Registration will close on 13 February 2026 midnight (GMT +1).

The First Order Draft of the 2027 Methodology Report on Inventories for Short-lived Climate Forcers will be available for Expert Review from 5 January to 27 February 2026.

For more information about the Expert Review of the 2027 Methodology Report on Inventories for Short-lived Climate Forcers, please  TFI Technical Support Unit (TSU) at nggip-tsu@iges.or.jp.

More information about IPCC review processes

For more information about IPCC and its processes, please contact:
 IPCC Press Office, Email: ipcc-media@wmo.int

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I,  assessing  the physical science basis of climate change; Working Group II, assessing  impacts, adaptation and vulnerability; and Working Group III, assessing  the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi.

At its first Plenary Session in the seventh assessment cycle – the 60th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

At the Panel’s most recent Plenary Session in Lima, Peru, in October 2025, member governments agreed on the scientific content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. There, the Panel also agreed on the 2026 workplan for the three Working Group contributions to the Seventh Assessment Report.

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.  

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

For more information visit www.ipcc.ch

Paris, Dec 1 – More than six hundred experts appointed to the three Working Groups of the Intergovernmental Panel on Climate Change (IPCC) are gathering in Paris this week to commence work on the first draft of IPCC’s Seventh Assessment Report (AR7). This is the first time in IPCC’s history that the three Working Groups are holding a joint Lead Author Meeting.

At the invitation of the French government, through the Ministry of Ecological Transition, Biodiversity, and International Negotiations on Climate and Nature, the Ministry of Education and Research and the Ministry for Europe and Foreign Affairs, the IPCC’s Lead Author Meeting, held jointly by the three Working Groups, is taking place from 1 to 5 December. The authors, from more than 100 countries, will focus their work on the initial drafts of the three Working Group contributions to AR7 and cross-cutting topics. Bringing together authors from all three Working Groups in a single venue aims to enable the IPCC to take an ambitious qualitative leap in assessing key interdisciplinary questions related to climate change.

“It is apt that France is hosting our first Lead Author Meeting for the Seventh Assessment Report on the 10th anniversary of the Paris Agreement. The meeting marks the beginning of our assessment of the latest science related to climate change. From here on, our focus will be on delivering scientifically robust and actionable findings relevant for the world’s policymakers,” said IPCC Chair Jim Skea.

The IPCC provides the world’s policymakers with comprehensive summaries that synthesise and contextualise what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks. Through its assessments, the IPCC identifies the strength of scientific agreement in different areas and indicates where further research is needed.

“In this year marking the 10th anniversary of the Paris Agreement, France is proud to host the very first joint meeting of all IPCC authors. This is an opportunity to send a strong message of support for science, which must remain the foundation of our decisions to reduce our emissions everywhere across the world,” said Monique Barbut, Minister of Ecological Transition, Biodiversity and International Negotiations on Climate and Nature.

Mr Jean-Noël Barrot, Minister for Europe and Foreign Affairs said: “Ten years after the Paris Agreement, France is proud to champion climate and scientific diplomacy informed by the work of the IPCC. In an era marked by growing information warfare, France stands as a steadfast bulwark against attacks on science. We will continue to act with strength and determination to ensure that science and climate action remain inseparable.”

IPCC assessments aim for the highest standards of scientific excellence, balance, and clarity.  Appointed experts volunteer their time and expertise as IPCC authors to assess the tens of thousands of scientific papers published each year.

“The sheer volume and high level of interest that we received from the scientific community to participate in the IPCC is a positive indication of a global commitment to advance climate action policies that are rooted in science,” said Robert Vautard, Co-Chair of Working Group I and senior climate scientist at the National Centre for Scientific Research at Institute Pierre-Simon Laplace, Paris.

IPCC reports are subject to multiple stages of review to ensure a comprehensive, objective and transparent assessment of the current state of knowledge of the science related to climate change. An open and transparent review by experts and governments around the world is an essential part of the IPCC process, to ensure an objective and complete assessment and to reflect a diverse range of views and expertise.

The IPCC’s first joint Lead Author Meeting will be opened by Monique Barbut, Minister of Ecological Transition, Biodiversity and International Negotiations on Climate and Nature.

For more information about the first Lead Author Meeting please contact:

Woo Qiyun, Senior Communications Manager of the IPCC Working Group II (media@ipccwg2.org).

Media requests for interviews with IPCC Chair Jim Skea should be addressed to IPCC Head of Communications, Andrej Mahecic (amahecic@wmo.int).

ENDS

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I,  assessing  the physical science basis of climate change; Working Group II, assessing  impacts, adaptation and vulnerability; and Working Group III, assessing  the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi.

At its first Plenary Session in the seventh assessment cycle – the 60th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

At the Panel’s most recent Plenary Session in Lima, Peru, in October 2025, member governments agreed on the scientific content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. There, the Panel also agreed on the 2026 workplan for the three Working Group contributions to the Seventh Assessment Report

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.  

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

GENEVA, Nov 19 – The Intergovernmental Panel on Climate Change (IPCC) is calling for nominations of the authors for the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage. Carbon Dioxide Removal refers to anthropogenic activities that remove CO₂ from the atmosphere and store it durably in geological reservoirs or in products.

The content of the 2027 Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage was agreed upon at the IPCC’s 63rd Plenary Session held in Lima from 27 to 30 October 2025.

“With immediate, deep and sustained reductions in greenhouse gas emissions and deployment of substantial CO₂ removal, it may still be possible to limit global warming to 1.5°C by the end of this century. Greater knowledge about carbon dioxide removal technologies can complement climate mitigation strategies. This methodology report will be important for the possible integration of these into national GHG inventories and climate action plans,” said Task Force on National Greenhouse Gas Inventories Co-Chair Takeshi Enoki.

The Coordinating Lead Authors and Lead Authors are responsible for drafting the different chapters of the Methodology Report and revising them based on comments submitted during the review process.

Hundreds of experts worldwide volunteer their time and expertise to produce the IPCC’s reports. It is important that the author teams aim to reflect a range of scientific and technical views and backgrounds. The IPCC also seeks a balance of male and female experts, as well as between those experienced with working on IPCC reports and those new to the process, including younger experts.

The 2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization and Storage is being prepared by the Task Force on National Greenhouse Gas Inventories.  The Task Force Bureau will select Coordinating Lead Authors, Lead Authors and Review Editors from the list of nominations.

Those interested in being nominated for the author team should contact their relevant Focal Point. A list of Focal Points for IPCC member governments and observer organizations is available here.

Governments, Observer Organizations, and IPCC Bureau Members have been requested to submit their nominations by Friday 12 December 2025 (midnight CET).

Nominations are submitted through a dedicated online nomination tool by Focal Points and IPCC Bureau Members only.

More information on the nomination process is here and how the IPCC selects its authors is available here.

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. 

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage. At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027. The Panel agreed on the outlines of the Working Group contributions to the Seventh Assessment Report during its 62^nd Session in February 2025 held in in Hangzhou, China.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

For more information visit www.ipcc.ch.

The website includes outreach materials including videos about the IPCC and video recordings from outreach events conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our YouTube channel.  

GENEVA, September 17 – The Intergovernmental Panel on Climate Change (IPCC) opened today the registration for experts to serve as Expert Reviewers on the First-Order Draft (FOD) of the Special Report on Climate Change and Cities.

Following the Second Lead Author Meeting this August, authors of this Special Report have prepared a first draft, which will be open in a month for experts worldwide to review and provide comments.

The review of the First Order Draft is the first of multiple review stages foreseen for every IPCC report. The review process is critical in preparing IPCC reports, as it helps ensure scientific rigour, the widest range of perspectives, and relevance to the urgent challenges urban areas and communities face in a warming world and changing climate.

Scheduled for release in March 2027, the Special Report on Climate Change and Cities will be the first IPCC report published in the seventh assessment cycle. It is also the only special report in the current cycle.  The report aims to provide a timely assessment of the latest science related to climate change and cities, including climate impacts and risks, as well as adaptation and mitigation options. 

This review is the first opportunity for experts to engage with the draft text of the Special Report. All review comments submitted by experts or governments are addressed by the authors. The comments and the author responses, together with the drafts, are published after the report is finalised.

“Our team of around 100 authors have dedicated their time and expertise to develop a meaningful and holistic first draft of the Special Report. We sincerely invite members of the urban community to come forward to provide comments to ensure this report will reflect the latest science and be relevant to the work of urban practitioners around the world,” said Winston Chow, Co-Chair of Working Group II.

“We want to hear the voices of experts from around the world, as we know that city contexts differ worldwide. Expert reviews are critical touchpoints with the global community. They allow authors to consider diverse perspectives and listen to local realities,” said Bart van den Hurk, Co-Chair of Working Group II.

Interested experts can register for participation in the review here. The registration of experts closes on 30 November 2025.

The FOD of the IPCC Special Report on Climate Change and Cities is available for Expert Review from 17 October to 12 December 2025.

For more information about the Expert Review, please contact Woo Qiyun, Senior Communications Manager, IPCC Working Group II Technical Support Unit, media@ipccwg2.org.

More information about IPCC review processes

For more information about IPCC and its processes, please contact:
 IPCC Press Office, Email: ipcc-media@wmo.int

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi.

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62^nd Plenary Session held in Hangzhou, China, in February 2025, the Panel agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

The Panel had already decided during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage.

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half of 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

For more information, please visit www.ipcc.ch.

The website includes outreach materials including videos about the IPCC and video recordings from outreach events conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our YouTube channel. 

GENEVA, August 18 – The Intergovernmental Panel on Climate Change (IPCC) has appointed 664 experts from 111 countries to participate in the Seventh Assessment Report (AR7) as Coordinating Lead Authors, Lead Authors and Review Editors.  

These experts were nominated by governments and IPCC observer organisations and selected by the IPCC Bureau from a global pool of 3,771 nominees.

Of the 664 appointed experts, more than half (51 per cent) come from developing countries and countries with economies in transition. Nearly half of the authors are female scientists, constituting 46 per cent of the group. For comparison, in the Sixth Assessment Report (AR6), the IPCC appointed 721 authors from over 90 countries. Of these, 44 per cent were from developing countries and countries with economies in transition, 53 per cent were new to the IPCC process, and 33 per cent were female. The nominations of all appointed authors have been reviewed under the IPCC’s Conflict of Interest process, and they have accepted their invitations.

“The appointment of the author teams means that work on the Seventh Assessment Report on the state of climate science can now begin. The author teams, drawn from several thousand excellent nominations, ensure outstanding expertise across a range of disciplines. We are proud that the new author teams reflect increased diversity, in terms of both gender balance and greater representation from developing countries and economies in transition”, said IPCC Chair Jim Skea.  

The appointed authors will now begin their work on assessing relevant literature and preparing drafts of their respective reports on the basis of the outlines of the Working Group contributions to the AR7, agreed upon by the Panel at its 62nd session in Hangzhou, China, in February 2025. The First Lead Author meeting is scheduled for early December.

The three IPCC Working Group reports are expected to start appearing in mid-2028, while the Synthesis Report that will conclude the entire cycle will be approved by late 2029, completing the seventh assessment cycle.

The list of selected Coordinating Lead Authors, Lead Authors and Review Editors by Working Group contribution to AR7 and chapter can be accessed here.

For more information, contact:
IPCC Press Office, Email: ipcc-media@wmo.int

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. 

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62^nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage.

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcersscheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

For more information visit www.ipcc.ch.

The website includes outreach materials including videos about the IPCC and video recordings from outreach events conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our YouTube channel.  

MOMBASA, Kenya, Jul 21 – The Second Lead Author Meeting of the Intergovernmental Panel on Climate Change (IPCC) Special Report on Climate Change and Cities taking place in Mombasa, Kenya, this week will advance the work on the First Order Draft (FOD) of the IPCC’s only special report in the seventh assessment cycle. The first of multiple review stages opens in October, when experts will have the initial opportunity to review and comment on the draft text.

The meeting in Mombasa from 21 to 25 July 2025, brings together nearly 100 selected authors from more than 50 countries. Scheduled for release in March 2027, the Special Report on Climate Change and Cities will be the first report delivered by the IPCC in the current cycle.

The drafting process for this Special Report has been underway since the First Lead Author Meeting in Osaka, Japan earlier this year. Selected authors have been developing the report based on the outline agreed by the 195-member government Panel during its 61st Session held in Sofia, Bulgaria from 27 July to 2 August 2024.

This IPCC meeting is hosted by the Kenyan State Department for Environment and Climate Change. It will bring together experts from the IPCC Working Group I (the physical science basis), Working Group II (impacts, adaptation and vulnerability), and Working Group III (mitigation of climate change), including researchers and practitioners from urban communities who have been selected by the Working Group I, II and III Bureaus to serve as Coordinating Lead Authors and Lead Authors  on the report.

“We are grateful to be hosted by the Kenyan government and the city of Mombasa. A city – where people live, work and enjoy – that also has unique characteristics, such as having an ocean as its neighbor, a rich cultural blend and history, and is a popular tourist destination. As our authors draft the report, they know their dynamic exchange of ideas throughout the week will be surrounded by numerous urban topics and stakeholders they want to address. We look forward to this unique opportunity to engage with the beautiful city and its vibrant inhabitants.” said Bart van den Hurk, IPCC Working Group II Co-Chair.

The Special Report on Climate Change and Cities aims to provide a timely assessment of the latest science related to climate change and cities, including climate impacts and risks, as well as adaptation and mitigation solutions that can be taken to minimize the impacts and risks. 

“African cities are vulnerable to the impacts of climate change, but they are also critical hubs for climate resilience and action. It is key that we contribute to the Special Report and engage with the assessment cycle to also develop insights that are crucial for decision making in the region, “said Cromwel Lukorito, a climate scientist at the University of Nairobi Department of Earth and Climate Sciences and IPCC Working Group II Vice-Chair, based in Nairobi, Kenya.

The author team of this Special Report comprises a diverse set of experts who participate as authors or review editors, including 13 experts from Africa.

There will be a Media Briefing about the ongoing work on the Special Report on Climate Change and Cities led by IPCC’s Working Group II from 8.30am to 9.00am (local time) on Monday, 21 July 2025 at the Prideinn Paradise Beach Resort and Spa, followed by the formal opening which is open to the media from 9.00 am to 10:00 am (local time).

For more information and interview requests for the IPCC experts participating in this meeting, please contact Woo Qiyun, Senior Communications Manager, IPCC Working Group II Technical Support Unit, media@ipccwg2.org.

Pan-African Regional Outreach Event (25-26 July 2025)

A Pan-African Regional Outreach Event in Support of the IPCC Process will be held at the Technical University of Mombasa (TUM) on 25-26 July 2025.

The Technical University of Mombasa is located along Tom Mboya Street, Mombasa, Kenya.

The Kenyan Government with support from the IPCC will host government and academic representatives from the five African sub-regions (North Africa, West Africa, East Africa, Southern Africa, and Central Africa) for a two-day outreach event with the aim to increase awareness and opportunities to contribute to the IPCC processes throughout the seventh assessment cycle and beyond.

Speakers from the IPCC Bureau include Working Group I Co-Chair Robert Vautard and Xiaoye Zhang, Working Group II Co-Chairs Winston Chow and Bart van den Hurk, Working Group III Co-Chair Şiir Kilkiş, and Working Group II Vice-Chair Cromwel Lukorito.

For more information about this event, please contact IPCC Head of Communications and Media Relations, Andrej Mahecic (amahecic@wmo.int) and IPCC Communications Officer, Melissa Walsh (mwalsh@wmo.int).

Notes for Editors
What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. 

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62^nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage.

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

For more information visit www.ipcc.ch.

The website includes outreach materials including videos about the IPCC and video recordings from outreach events conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our YouTube channel.  

GENEVA, June 19 — The Intergovernmental Panel on Climate Change (IPCC) and the American Geophysical Union (AGU) announce access to the full library of AGU Publications for IPCC authors working on the Panel’s Seventh Assessment Report, or AR7.

“This landmark decision is an invaluable scientific boost for the IPCC’s ongoing work,” said IPCC Chair Jim Skea. “It will enable our authors from developing countries and those facing access barriers to enhance their scientific contributions to the upcoming reports of IPCC’s three Working Groups assessing the latest science related to climate change. We encourage other major scientific publishers to consider following suit at this critical time for climate science.”

As a non-profit scholarly publisher, AGU publishes 24 peer-reviewed high-impact journals and four active book series, including monographs, advanced-level textbooks, and technical manuals across the entire spectrum of Earth and space sciences. It also runs the Earth and Space Science Open Archive.

AGU journals publish research articles, letters, commentaries and other types of scholarly content within the fields of Earth and space sciences. Covering topics ranging from atmospheric science and oceanography to geophysics, planetary science, and climate change, AGU journals are an essential mode of information sharing and enterprise building for the global scientific community.

“IPCC Reports provide authoritative scientific consensus on climate change to a broad spectrum of key players, from government and community leaders to industries and advocacy organizations,” said AGU President Brandon Jones. “Opening AGU publications’ portfolio to the authors of the Seventh Assessment Report provides greater equitable access to critical research of the scientific community, which can be assessed, considered, and weighed when informing the final report.”

Following the Panel’s agreement in February on the outlines of the three Working Group contributions during its 62nd Session held in Hangzhou, China, the IPCC has now completed the call for nominations of experts to act as Coordinating Lead Authors, Lead Authors, or Review Editors for the three key Working Group contributions to IPCC’s Seventh Assessment Report.

Hundreds of experts in different scientific domains worldwide will be selected to volunteer their time and expertise to produce the new set of IPCC Reports. Author teams will reflect a range of scientific, technical, and socio-economic knowledge. Coordinating Lead Authors and Lead Authors will be responsible for drafting the different chapters of the Working Group contributions to the AR7 and, with the help of the Review Editors, revising those based on comments submitted during the two rounds of reviews by experts and governments.

IPCC author teams include experts from different regions to ensure geographic balance. The IPCC also seeks a balance in gender, as well as a balance between those authors with experience in working on IPCC Reports and those new to the process, including younger scientists.

The outlines of the three Working Group contributions to the AR7 were developed after a comprehensive scientific scoping meeting in December 2024 in Kuala Lumpur, Malaysia, before the Panel considered them and agreed upon them at the end of February.

For more information, contact:
IPCC Press Office, Email: ipcc-media@wmo.int;
Andrej Mahecic, +41 22 730 8516; Werani Zabula, +41 22 730 8120
AGU contact: Josh Weinberg, news@agu.org 

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

What is AGU

The American Geophysical Union (www.agu.org) is a global community supporting more than half a million scientists, advocates, and professionals in Earth and space sciences. Through broad and inclusive partnerships, AGU aims to advance discovery and solution science that accelerate knowledge and create solutions that are ethical, unbiased and respectful of communities and their values. Our programs include serving as a scholarly publisher, convening virtual and in-person events and providing career support. We live our values in everything we do, such as our net zero energy renovated building in Washington, D.C. and our Ethics and Equity Center, which fosters a diverse and inclusive geoscience community to ensure responsible conduct.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. 

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62^nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage.

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

For more information visit www.ipcc.ch.

The website includes outreach materials including videos about the IPCC and video recordings from outreach events conducted as webinars or live-streamed events.

Most videos published by the IPCC can be found on our YouTube channel.  

GENEVA, Mar 24 – Over 100 experts from more than 40 countries are meeting in Bilbao, Spain this week for the first meeting of authors and review editors of the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers (SLCF). This will be the first methodology report released by IPCC in the seventh assessment cycle and it is being prepared by the Task Force on National Greenhouse Gas Inventories (TFI).

The 2027 Methodology Report is expected to provide guidance on anthropogenic emissions for Short-lived Climate Forcers, not including secondary human-induced substances.

“The report aims to provide clear guidance on measuring emissions from key short-lived climate forcing substances, including nitrogen oxides, carbon monoxide, and others, which significantly contribute to global and regional air quality and climate change,” said Takeshi Enoki, one of the Co-Chairs of the TFI.

This week´s meeting in Bilbao marks the beginning of the drafting process of this Methodology Report which is scheduled to be released in March 2027. The Coordinating Lead Authors and Lead Authors at this meeting will start developing the report based on the outline agreed by the Panel during its 61st Session held in Sofia, Bulgaria in July/August 2024.  

“We are excited to begin work on this report with a diverse group of experts selected from the 394 nominations we received. Their work will be important for enhancing the data used in climate models,” said Mazhar Hayat, TFI Co-Chair.

Following the Panel’s 61st Session, the IPCC called for nominations of experts to act as Authors and Review Editors of the 2027 Methodology Report in August 2024. The TFI Bureau, also known as the Task Force Bureau, in consultation with relevant Working Group Co-Chairs selected the report’s Coordinating Lead Authors, Lead Authors and Review Editors. In their selection, they considered scientific and technical expertise, geographical and gender balance in line with Appendix A to the Principles Governing IPCC Work.

A preliminary list of the Authors for the 2027 Methodology Report is available here.

Following the Lead Author Meeting, there will be an outreach event hosted by the Spanish Climate Change Office at the Bizkaia Aretoa in Bilbao on 27 March 2025. More details on the event are available here.  

For more information, contact:
IPCC Press Office, Email: ipcc-media@wmo.int;
Andrej Mahecic, +41 22 730 8516; Werani Zabula, +41 22 730 8120.

Notes for Editors

What is the IPCC?

The Intergovernmental Panel on Climate Change (IPCC) is the UN body for assessing the science related to climate change. It was established by the United Nations Environment Programme (UNEP) and the World Meteorological Organization (WMO) in 1988 to provide political leaders with periodic scientific assessments concerning climate change, its implications and risks, as well as to put forward adaptation and mitigation strategies. In the same year the UN General Assembly endorsed the action by the WMO and UNEP in jointly establishing the IPCC. It has 195 member states.

Thousands of people from all over the world contribute to the work of the IPCC. For the assessment reports, scientists and experts volunteer their time as IPCC authors to assess the thousands of scientific papers published each year to provide a comprehensive summary of what is known about the drivers of climate change, its impacts and future risks, and how adaptation and mitigation can reduce those risks.

The IPCC has three working groups: Working Group I, dealing with the physical science basis of climate change; Working Group II, dealing with impacts, adaptation and vulnerability; and Working Group III, dealing with the mitigation of climate change. It also has a Task Force on National Greenhouse Gas Inventories that develops methodologies for measuring emissions and removals.

IPCC assessments provide governments, at all levels, with scientific information that they can use to develop climate policies. IPCC assessments are a key input into the international negotiations to tackle climate change. IPCC reports are drafted and reviewed in several stages, thus guaranteeing objectivity and transparency.

About the Seventh Assessment Cycle

Comprehensive scientific assessment reports are published every 5 to 7 years. The IPCC is currently in its seventh assessment cycle, which formally began in July 2023 with the elections of the new IPCC and Task Force Bureaus at the IPCC’s Plenary Session in Nairobi. 

At its first Plenary Session in the seventh assessment cycle – the 60^th Plenary Session in Istanbul, Türkiye, in January 2024 – the Panel agreed to produce in this cycle the three Working Group contributions to the Seventh Assessment Report (AR7), namely the Working Group I report on the Physical Science Basis, the Working Group II report on Impacts, Adaptation and Vulnerability and the Working Group III report on Mitigation of Climate Change. The Synthesis Report of the Seventh Assessment Report will be produced after the completion of the Working Group reports and released by late 2029.

During its 62^nd Plenary Session held in Hangzhou, China, in February 2025, the Panel has agreed on the outlines of the three Working Group contributions to the Seventh Assessment Report (AR7).

The Panel decided already during the previous cycle to produce a Special Report on Climate Change and Cities and a Methodology Report on Short-lived Climate Forcers during AR7.. Scientists have also been asked to deliver a Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture Utilization and Storage.

At the IPCC’s  61st Plenary Session held in Sofia, Bulgaria, from 27 July to 2 August 2024, the Panel agreed upon the outlines for the Special Report on Climate Change and Cities scheduled for approval and publication in March 2027 and for the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers scheduled for publication in the second half 2027.

In addition, a revision of the 1994 IPCC Technical Guidelines on impacts and adaptation as well as adaptation indicators, metrics and guidelines, will be developed in conjunction with the Working Group II report and published as a separate product.

IPCC’s latest report, the Sixth Assessment Report, was completed in March 2023 with the release of its Synthesis Report, which provided direct scientific input to the First Global Stocktake process under the United Nations Framework Convention on Climate Change at COP28 in Dubai.

The Sixth Assessment Report comprises three Working Group contributions and a Synthesis Report. The Working Group I contribution Climate Change 2021: the Physical Science Basis was released on 9 August 2021. The Working Group II contribution, Climate Change 2022: Impacts, Adaptation and Vulnerability, was released on 28 February 2022. The Working Group III contribution, Climate Change 2022: Mitigation of Climate Change, was released on 4 April 2022 and the Synthesis Report on 20 March 2023. The Synthesis Report to the Sixth Assessment Report, distils and integrates the findings of the three Working Group assessments as well as the three Special Reports released in 2018 and 2019.

The special reports were on Global Warming of 1.5°C (October 2018.), Climate Change and Land (August 2019) and, the Ocean and Cryosphere in a Changing Climate (September 2019).

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