The TFI is active in assessing and refining these estimation methodologies in response to the development of new technologies or with the emergence of new science or techniques for the measurement, estimation or verification of net emissions.

The methodologies are made available in a series of Methodology Reports produced by the TFI.

For the IPCC’s Seventh Assessment Cycle, the TFI is preparing two new Methodology Reports:

• the 2027 IPCC Methodology Report on Inventories for Short-lived Climate Forcers; and
• the 2027 IPCC Methodology Report on Carbon Dioxide Removal Technologies, Carbon Capture, Utilization, and Storage for National Greenhouse Gas Inventories (Additional guidance).

Other activities include Expert Meetings to assess and review important estimation concepts and methodologies.

The TFI also encourages the widespread use of the IPCC methodologies through workshops, information materials and the production of the IPCC Inventory Software that facilitates easy and accurate use of the methodologies.

The IPCC Inventory Software can be used to support reporting by countries and Parties  to the Paris Agreement.  The TFI is active in supporting the use of this software in order to promote the aim of a wide dissemination of IPCC methodologies.

The TFI also supports estimation of greenhouse gas emissions and removals through the Emission Factor Database, which is a recognized library of emission factors and other parameters that supplement IPCC default factors that are made available in the Methodology Reports.

The work of the TFI is undertaken at the request of IPCC member governments and is managed by two elected Co-Chairs and an elected Bureau with twelve members supported by a Technical Support Unit based in Japan.