Guidance & Resources for Working with GHG Inventory Data Cogeneration Emissions The categorization in this workbook matches the "Economic Sector Categorization" inventory spreadsheet above. Totals by Gas GHG Emission Summaries Segregated by Gasĭownload a detailed list of all fuel combustion data used to calculate the GHG emissions by sector and activity. Supplemental Method Updates Document (Years 2017-2021)ĭata Summaries of GHG Emissions by Categorization Group A compilation of these documents is found below and can be used in conjunction with the full Technical Support Document to show all information for the methodologies of the inventory calculations. Since then, staff have prepared Inventory Updates Documents that specify all methodology changes made to the inventory for each year. GHG Inventory Documentation Index Technical DocumentationĬARB has a fully detailed Technical Support Document, last updated for the 2016 edition of the inventory. The table below provides a crosswalk among the three categorization schemes.Ģ000–2020 Inventory Updates Documentation IPCC process-oriented categories follows the IPCC categorization to ensure comparability with international inventories.Economic sectors allows for comparison with other CARB emission inventories, which are similarly categorized.Scoping Plan follows the categories identified in the AB 32 Scoping Plan.The California GHG inventory is categorized in three ways: Thus the new inventory may report a different emission level for an earlier year than previous inventory editions. Emission estimates are recalculated for all years to maintain a consistent time-series following IPCC recommendations for developing GHG inventories. In preparation for each new edition of the inventory, recalculations are made to correct errors, incorporate new methodologies or, most commonly, to reflect changes in statistical data supplied by other agencies. The current inventory uses 100-year global warming potential (GWP) values from the IPCC Fourth Assessment Report, consistent with current international and national GHG inventory practices. Calculation methodologies are consistent with the 2006 IPCC Guidelines. Statewide emission estimates rely on state, regional or federal data sources, and on aggregated facility-specific emission reports from CARB's Mandatory GHG Reporting Program (MRR). Global Warming Potentials (GWPs) for GHG Emissions Archives of all previous inventory data and documentation are available on the archive page. An updated emission inventory is published annually to include additional years and improved estimation methods. It uses an inventory scope and framework consistent with international and national GHG inventory practices. The inventory includes estimates for carbon dioxide (CO 2), methane (CH 4), nitrous oxide (N 2O), and fluorinated gases with high global warming potentials (High-GWP) which includes hydrofluorocarbons (HFCs), perfluorocarbons (PFCs), sulfur hexafluoride (SF 6), and nitrogen trifluoride (NF 3). CARB is responsible for maintaining and updating California's GHG Inventory per H&SC section 39607.4. The inventory provides estimates of anthropogenic GHG emissions within California, as well as emissions associated with imported electricity natural sources are not included in the inventory. In concert with data collected through various California Global Warming Solutions Act (AB 32) programs, the GHG inventory is a critical piece in demonstrating the state's progress in achieving the statewide GHG target. Webinar Presentation Slides Ĭalifornia's annual statewide greenhouse gas (GHG) emission inventory is an important tool for establishing historical emission trends and tracking California's progress in reducing GHGs. Note: Carbon dioxide equivalent values are calculated using the IPCC's Fourth Assessment Report 100-year Global Warming Potential values. It provides easy-to-read graphs and explanations to illuminate California's progress in its commitment to reduce climate-changing emissions.Ģ000–2020 GHG Emissions Trends Report Data used for figures in the report is available for download. Links to additional data and documentation can be found below. The California Greenhouse Gas Emissions for 2000 to 2020, Trends of Emissions and Other Indicators, summarizes and highlights the major annual changes and notable longer-term trends of each year's GHG inventory. Graphic: California's greenhouse gas emissions in 2020 broken out by economic sector California Greenhouse Gas 2000-2020 Emissions Trends and Indicators Report
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