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♤ The IPCC established the national green house gas Inventories Programme (NGGIP) to provide methods for estimating national inventories of greenhouse gas emissions to, and removals from, the atmosphere.
♤ The guidance produced by the NGGIP is used by countries that are Parties to the UN Framework Convention on Climate Change (UNFCCC) to estimate the emissions and removals that they report to the UNFCCC.
♤ It may be used by others who want to produce estimates consistent with national totals. Internationally agreed guidance is needed so that emission and removal estimates can be compared between countries and over time.
♤ All the IPCC guidance has therefore been compiled by an international range of authors and with an extensive global review process.
Methodology
♤ The first methodologies were produced by the IPCC in early 1990s and have been revised since (Development of IPCC Guidelines and Good Practice Guidance).
♤ The Revised 1996 Guidelines for National Greenhouse Gas Inventories, the Good Practice Guidance and Uncertainty Management in National Greenhouse Gas Inventories (GPG2000) and the Good Practice Guidance for Land Use, Land-Use Change and Forestry (GPG-LULUCF) are used by developed countries to estimate emissions and removals, and are recommended by the UNFCCC for use by all countries.
♤ The 2006 IPCC Guidelines for National Greenhouse Gas Inventories (the 2006 Guidelines) are the IPCC’s most recent guidance on methods and data for developing estimates of emissions and removals of greenhouse gases.
♤ They build on earlier guidance, over a decade of experience and a world-wide scientific and technical effort to produce guidelines, applicable to all countries notwithstanding widely varying levels of resources and expertise.