Expected Outcomes of the Scoping Meeting
IPCC Scoping Meeting
Methodology Report on Short-lived Climate Forcers (SLCFs): 2027 Supplement to the 2006 IPCC Guidelines
Brisbane, Australia, 26-28 February 2024
Baasansuren Jamsranjav
IPCC TFI TSUOutline• Expected outcomes:
Recommendation on the title and format of the Methodology Report• Draft Terms of Reference (TOR)• Draft Table of Contents (TOC)• Draft Instructions to Experts and Authors•

Working drafts of these documents have been provided to support the work of theScoping Meeting.
• These outputs will be the core documents of the proposal by TFI Bureau to the IPCC
Panel for its consideration.

Recommendation on the title and format of the Methodology Report• Methodology Report on SLCFs will provide guidance on the preparation and reportingof a national inventory of SLCFs emissions.
Title: e.g., “2027 Supplement to the 2006 IPCC Guidelines for National Greenhouse Gas
Inventories: Short-lived Climate Forcers (2027 Supplement on SLCFs)”• Format: One single Methodology Report comprising an Overview Chapter and five
volumes following the format of the 2006 IPCC Guidelines•Draft TOR: Scope• SLCF species•

NOX, CO, NMVOCs, SO2, NH3, BC and OC (BC and OC can be presented in terms of fraction ofPM2.5)• Emissions

Anthropogenic• National• Annual• Reported in mass units for each individual emitted species•

Draft TOR: Scope• Inventory sectors
Energy• Industrial Process and Product Use (IPPU)• Agriculture, Forestry and Other Land Use (AFOLU)• Waste•Draft TOR: Approach• The authors will ensure consistency of the categorization of the source categories
and of methodological guidance with the 2006 IPCC Guidelines, Wetlands
Supplement and 2019 Refinement.
• The authors will follow “Instructions to Experts and Authors” to ensure a consistentand coherent approach across all the volumes and chapters, including the use ofcommon terminology.
• Guidance in the Methodology Report on SLCFs builds on guidance provided in the2006 IPCC Guidelines.

Draft TOC• It covers all inventory sectors andgeneral guidance and reporting.

Draft Instructions to Experts and Authors• Here the term “Experts” covers Co-Chairs, members of the TFI Bureau (TFB), TSU

Staff, Coordinating Lead Authors (CLAs), Lead Authors (LAs), and Review Editors(REs) as well as Contributing Authors (CAs) and Expert Reviewers.

Procedures for the preparation, review, acceptance, adoption, approval and publicationof IPCC Reports are explained in Appendix A to the Principles Governing IPCC Workhttps://www.ipcc.ch/documentation/procedures/

Draft Instructions to Experts and Authors: Authors• Confidentiality: Authors meetings are closed meetings and discussions are confidential
except for any published report of the meeting. Draft reports, prior to acceptance, to be “predecisional”, and provided in confidence to reviewers, and not for public distribution, quotationor citation.
• Conflict of Interest: The IPCC implements a Conflict of Interest Policy that applies to allindividuals directly involved in the preparation of IPCC reports. Experts involved in IPCC
activities shall avoid any conflict of interest.
• Tasks and responsibilities of authors are explained in Annex 1 of the Appendix A to thePrinciples Governing IPCC Work.
• Procedure on the use of literature in IPCC Reports is explained in Annex 2 of the Appendix
A to the Principles Governing IPCC Work.
• Should be familiar with IPCC inventory glossary and approaches.

Draft Instructions to Experts and Authors: Approach•

Target audience is national inventory compilers, thus emphasis should be on clear
communication of practical and understandable guidance with Tier 1 methods applicable
under any national circumstances.

•Cookbook approach by providing clear step by step instructions•Consider all recent scientific developments and methods used in national inventories•

Significant changes from the 2006 IPCC Guidelines will have significant implications for allcountries. Substantial changes should only be introduced if they can be justified on soundscientific and technical grounds.

•

Glossary of the 2019 Refinement as a basis

Draft Instructions to Experts and Authors: IPCC Default Values• Reproducibility of IPCC default is key. Thus, guidance is to be given to authors:•To provide in the Methodology Report references to data sources and to methods
applied to derive the IPCC default values•

To support derivation of country-specific values•

To compile all background data used to derive IPCC default values in a format to bereadily uploaded in IPCC Emission Factor Database (EFDB) https://www.ipccnggip.iges.or.jp/EFDB/main.php•

To use elicitation protocol for expert judgements

Draft Instructions to Experts and Authors: Methods & Units•

Prioritize IPCC methods•

Supplement, mutatis mutandis, IPCC methods•

Build on methods currently used by national inventories•

Prioritize national inventories and associated guidebooks to source default values forparameters and EFs•

Emissions must be in mass units (Gg)•

Activity data (AD) units need to be consistent across categories/sectors•

Conversion factors for AD and EF to SI units must be provided where needed

Metrics for Key Category Analysis will be considered in BOG1.

Thank you
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