Last reviewed on May 6, 2015

Greenhouse Gas Inventory - Archive

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The ARB GHG inventory is updated annually to include additional years and improved estimation methods. This website provides a repository of data and documentation for all past versions of the GHG inventory. These resources are provided for archive purposes only; please use the most current version of the ARB GHG inventory data and documentation.

Global Warming Potentials for Past Inventory Versions

Global warming potentials (GWPs) are used to convert mass emissions to carbon dioxide equivalent values (CO2e). These values are designated by the intergovernmental panel on climate change (IPCC), and are updated periodically to reflect advances in scientific knowledge. All inventories prior to 2012 use second assessment report (SAR) GWPs, while the 2000-2012 and current 2000-2013 inventories use fourth assessment report (AR4) GWPs. A table of SAR and AR4 GWP values and a further discussion can be found on the GWP page.

Archive Data and Documentation

2000-2013 Inventory [Current Version, AR4 GWPs]

Please see the current inventory webpage for data and documentation.


2000-2012 Inventory (AR4 GWPs)


2000-2011 Inventory (SAR GWPs)


2000-2010 Inventory (SAR GWPs)


2000-2009 Inventory (SAR GWPs)


2000-2008 Inventory (SAR GWPs)


2000-2006 Inventory (SAR GWPs)


1990-2004 Inventory

GHG emissions prior to 2000 are included in the 1990-2004 GHG Emission Inventory published in November 2007 (data available in the 1990 Level & Limit section of this site), which provided the basis for developing the 1990 statewide emissions level and 2020 emissions limit required by the Global Warming Solutions Act of 2006 (AB 32).