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IPCC Emission Factor Database (EFDB)
UN Climate Change Conference
Dubai, United Arab Emirates
9 December 2023
IPCC TFI TSU
Background
• Launched in 2002
• Open library of emission factors (EFs) and other parameters with background information
https://www.ipcc-nggip.iges.or.jp/EFDB/main.php
― Default data from IPCC guidelines
― Data from peer-reviewed scientific papers
― Data from other publications (e.g., national reports)
• Communication platform to share data and information that can be used for estimation of national
greenhouse gas (GHG) emissions/removals
• Recognized as a useful resource for inventory compilers (e.g., Decision 24/CP.19 UNFCCC
reporting guidelines on annual inventories for Parties included in Annex I to the Convention)
EFDB
• Regularly updated with new data
• Open to any data proposals ipcc-efdb@iges.or.jp
― Data proposals are considered by Editorial Board for inclusion into the EFDB
― Criteria for inclusion of new data: robustness, applicability and documentation
EFDB
Defaults
Editorial
Board
Accepted
Data
Data
Provider
Data
TSU
• Initial check of data
proposals
• Data search and
data proposals
Expert
Meeting
(Data
Meeting)
Data
Data
EFDB usage
• The number of unique visitors and amount of data downloaded have been increasing
― A “unique visitor” is a user who has made at least 1 hit on 1 page of the website during a month. If the user
makes several visits during the month, it is counted only once.
Search criteria e.g., specify gas,
type of parameters
Search options
(e.g., Basic search)
Status of search
Results can be
exported in Excel file
To narrow down
search results
Details of data
EFDB search
EFDB data output
Enhancement and improvement of EFDB
• New upgraded version is released in September 2023
― 2019 Refinement categories
― Enhanced search/filter functions (e.g., new search criteria)
― Data statistics
Enhancement and improvement of EFDB
EFDB meetings
• Annual meeting of the Editorial Board to consider data proposals and discuss how to
improve/enhance the EFDB
― 21st Meeting of Editorial Board (EB21), 16-19 May 2023, Christchurch, New Zealand
― Summary of the meetings are published at IPCC TFI website https://www.ipcc-
nggip.iges.or.jp/meeting/meeting.html
• Expert Meetings on Data for the EFDB (Data Meetings) have been organized annually since 2008
― Attended by data providers (e.g., inventory experts, researchers) and Editorial Board members
― 21st Data Meeting (DM21), 17-18 May 2023, Christchurch, New Zealand
• Total 2,445 data were accepted by the Editorial Board at the EB21 and DM21 for inclusion into the
EFDB
Criteria for inclusion of new data
• Robustness
― Within the accepted uncertainty, the value is unlikely to change if there was repetition of the original
measurement programme or modelling activity.
The term “accepted uncertainty” refers to the uncertainty of IPCC defaults for that category.
• Applicability
― An emission factor can only be applicable if the source and its mix of technology, operating and environmental
conditions and abatement and control technologies under which the emission factor was measured or modeled
are clear and allow the user to determine how it can be applied.
• Documentation
― Access information to the original technical reference must be provided to evaluate the robustness and
applicability as described above.
Thank you
https://www.ipcc-nggip.iges.or.jp/index.html
https://www.ipcc-nggip.iges.or.jp/EFDB/main.php

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IPCC Emission Factor Database (EFDB)

  • 1. IPCC Emission Factor Database (EFDB) UN Climate Change Conference Dubai, United Arab Emirates 9 December 2023 IPCC TFI TSU
  • 2. Background • Launched in 2002 • Open library of emission factors (EFs) and other parameters with background information https://www.ipcc-nggip.iges.or.jp/EFDB/main.php ― Default data from IPCC guidelines ― Data from peer-reviewed scientific papers ― Data from other publications (e.g., national reports) • Communication platform to share data and information that can be used for estimation of national greenhouse gas (GHG) emissions/removals • Recognized as a useful resource for inventory compilers (e.g., Decision 24/CP.19 UNFCCC reporting guidelines on annual inventories for Parties included in Annex I to the Convention)
  • 3. EFDB • Regularly updated with new data • Open to any data proposals ipcc-efdb@iges.or.jp ― Data proposals are considered by Editorial Board for inclusion into the EFDB ― Criteria for inclusion of new data: robustness, applicability and documentation EFDB Defaults Editorial Board Accepted Data Data Provider Data TSU • Initial check of data proposals • Data search and data proposals Expert Meeting (Data Meeting) Data Data
  • 4. EFDB usage • The number of unique visitors and amount of data downloaded have been increasing ― A “unique visitor” is a user who has made at least 1 hit on 1 page of the website during a month. If the user makes several visits during the month, it is counted only once.
  • 5. Search criteria e.g., specify gas, type of parameters Search options (e.g., Basic search) Status of search Results can be exported in Excel file To narrow down search results Details of data EFDB search
  • 7. Enhancement and improvement of EFDB • New upgraded version is released in September 2023 ― 2019 Refinement categories ― Enhanced search/filter functions (e.g., new search criteria) ― Data statistics
  • 9. EFDB meetings • Annual meeting of the Editorial Board to consider data proposals and discuss how to improve/enhance the EFDB ― 21st Meeting of Editorial Board (EB21), 16-19 May 2023, Christchurch, New Zealand ― Summary of the meetings are published at IPCC TFI website https://www.ipcc- nggip.iges.or.jp/meeting/meeting.html • Expert Meetings on Data for the EFDB (Data Meetings) have been organized annually since 2008 ― Attended by data providers (e.g., inventory experts, researchers) and Editorial Board members ― 21st Data Meeting (DM21), 17-18 May 2023, Christchurch, New Zealand • Total 2,445 data were accepted by the Editorial Board at the EB21 and DM21 for inclusion into the EFDB
  • 10. Criteria for inclusion of new data • Robustness ― Within the accepted uncertainty, the value is unlikely to change if there was repetition of the original measurement programme or modelling activity. The term “accepted uncertainty” refers to the uncertainty of IPCC defaults for that category. • Applicability ― An emission factor can only be applicable if the source and its mix of technology, operating and environmental conditions and abatement and control technologies under which the emission factor was measured or modeled are clear and allow the user to determine how it can be applied. • Documentation ― Access information to the original technical reference must be provided to evaluate the robustness and applicability as described above.