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The Subsidiary Body for Scientific and Technological Advice (SBSTA) regularly undertakes work on methodological and scientific matters as they relate to the Convention and the Kyoto Protocol process.  Some of the issues the SBSTA is currently dealing with are bunker fuels; and research and systematic observation.

Image Emissions Resulting from Fuel Used for International Transportation: Aviation and Marine "Bunker Fuels"
In accordance with the IPCC Guidelines for the preparation of greenhouse gas (GHG) inventories and the UNFCCC reporting guidelines on annual inventories, emissions from international aviation and maritime transportation (also known as international bunker fuel emissions) should be calculated as part of the national GHG inventories of Parties, but should be excluded from national totals and reported separately. These emissions are not subject to the limitation and reduction commitments of Annex I Parties under the Convention and the Kyoto Protocol.

Other Methodological Issues
This section includes information about interactions with the ozone layer; the Brazilian proposal; single projects; review of methodological work; Third Assessment Report of the IPCC; and links to sources of data on greenhouse gas emissions and to socio-economic data and tools.