The IPCC EFDB Database

The IPCC Emissions Factors database (EFDB).

The overall objective of the IPCC Emissions Factors database (EFDB) is to be an always up-to-date companion for the IPCC Guidelines for National Greenhouse Gas Inventory that is seen as a worldwide resource for greenhouse gas inventory developers.

The EFDB has the objective to provide a variety of users, in particular the inventory compilers of the Parties to the UNFCCC, with current and well-documented emission factors and other parameters, as well as to establish a communication platform for distributing and commenting on new research and measurement data.

Such a platform can provide an efficient means for experts and researchers to disseminate new emission factors or other parameters in a timely manner to a worldwide audience of potential end users.

The EFDB is meant to be a recognised data repository where users can find emission factors and other parameters with background documentation or technical references.

Equinox incorporates the EFDB database in its entirety1 to enable internal use of its data within various sustainable portfolio management workflows. Users can add their own Emissions Factors where those are more appropriate, using a format that aligns with the official EFDB database schema.


EFDB Database Structure

The database structure is in the form of a long database table (~17K entries, one row per emissions factor). For each emissions factor the following data are provided:

  • EF ID
  • IPCC Categories
  • Gases
  • Fuel
  • Type of parameter
  • Description
  • Technologies/Practices
  • Parameters/Conditions
  • Region/Regional Conditions
  • Abatement/Control Technologies
  • Other properties
  • Value
  • Unit
  • Equation
  • IPCC Worksheet
  • Source of data
  • Technical reference
  • Abstract in English
  • Uncertainty lower
  • Uncertainty upper
  • Data quality
  • Data quality reference
  • Other info on data quality
  • Comments from the data provider
  • Comments from others
  • Data provider
  • Link

EFDB Data Groups

To improve the readability of the internal representation the data are grouped in the following categories:

  • Identification of the Emissions Factor: (ID, Gas / Fuel, IPCC Category, Description)
  • Practices/Conditions: (Regional or Technology Conditions and Details)
  • Quantitative: (The value, range, units and uncertainty)
  • Reference: (Data sources, references, links etc)
  • Other: Any other attribute not fitting in the above


  1. Specifically version EFDB-2020.11 ↩︎