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
— Source: IPCC (https://www.ipcc.ch/2025/12/05/prslcffod/)