IPCC Emission Factor Database

The Emission Factor Database (EFDB) is a continuously revised web-based information exchange forum for emission factors and other parameters relevant for the estimation of emissions or removals of greenhouse gases at national level. The database can be queried over the internet via the home pages of the IPCC, IPCC-NGGIP or directly at http://www.ipcc-nggip.iges.or.jp/EFDB/main.php.5 The IPCC distributes a CD-ROM with a copy of the database and a query tool at regular intervals.6 It is designed as a platform for experts and researchers to communicate new emission factors or other parameters to a worldwide audience of potential end users. The EFDB is intended to become a recognised library where users can find emission factors and other parameters with background documentation or technical references. The criteria for inclusion of data in the database (see Figure 2.2) are:

• Robustness: The value would be unlikely to change, within the accepted uncertainty of the methodology, if there were to be a repetition of the original measurement programme or modelling activity.

• 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 modelled are clear, and allow the user to see how it can be applied.

• Documentation: Access information to the original technical reference is provided to evaluate the robustness and applicability as described above.

Figure 2.1 Process for including data in the EFDB

Figure 2.1 Process for including data in the EFDB

The EFDB invites experts and researchers all over the world to populate the EFDB with their data. The proposal of new emission factors (and other parameters) from data providers will be assessed by the Editorial Board of the EFDB for inclusion into the database. When the proposed new data comply with well-defined quality criteria of robustness, applicability and documentation they are included in the database. These procedures enable the user to judge the applicability of the emission factor or other parameter for use in their inventory and the responsibility of using this information appropriately however will always remain with the users.

5 Information, including manuals, on how to retrieve data from or contribute new data to the EFDB can also be found at this web site.

6 To receive a copy of the EFDB CD-ROM, please contact IPCC NGGIP Technical Support Unit.

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