A Community Emissions Data System (CEDS) for Historical Emissions

Historical emission estimates for anthropogenic aerosol and precursor compounds are key data needed for Earth system, climate, atmospheric chemistry, and transport models, as well as for economic and energy models. Historical emissions data are used both for general analysis and assessment and also for model validation through comparisons with observations.

CEDS gitHub Site Now Live

The CEDS public gitHub repository is now available. At this time, the repo contains documentation and issues tracking. Known issues with the current data release are being tracked there. If you find an issue with the current CEDS data, please post an issue using the “Issues” tab of the repository. We are currently preparing the code and data for public release at this same location.

Project Goals

The CEDS project is building a data-driven, open source framework that will produce annually updated emission estimates for research and analysis.

The data system produces emission estimates by country, sector, and fuel with the following characteristics:

  • Annual estimates of anthropogenic emissions (not including open burning) to latest full calendar year over the entire industrial era. Readily updated every year.
  • Emission species: aerosol (BC, OC) and aerosol precursor and reactive compounds (SO2, NOx, NH3, CH4, CO, NMVOC) and CO2 (as reference)
  • State/province spatial detail for large countries – in progress
  • Seasonal cycle (monthly) and aggregate NMVOCs by sector/sub-sector
  • Gridded emissions (up to 0.1°) w/ sub-national resolution for large countries
  • Uncertainty estimated at the same level (country, fuel, sector) – in progress

Project Status

  • Historical gridded emissions data for use in the Coupled Model Inter-comparison Project Phase 6 (CMIP6) has been released through the Earth System Grid Federation. More details, including data access information and supplemental information is available at the CEDS CMIP6 pageSee this page for an important update: users of the gridded emissions should update to the May 2016 version.
  • A Journal Article describing the data and methodology has been published in CMIP6 special issue of Geoscientific Model Development. (Note that updated methodology documentation is available on-line at the project gitHub site.)
  • We are working toward a winter 2018 release of the full data system for community use.
  • We have presented at the August 2017 International Emissions Inventory Conference in Baltimore and the September 2017 GEIA Meeting Hamburg, Germany. Presentations will be available online through conference websites.

Community Input

CEDS E-mail list: To receive updates on project progress and notice of opportunities for participation you can sign up for an information distribution list. (This list will be used only for CEDS-related information and e-mail addresses will not be shared or distributed.) To subscribe to the listserv, please send an email to listserv@listserv.umd.edu with the email body: “subscribe cedsinfo”. You can also go directly to the website for the listserv at: https://listserv.umd.edu/archives/cedsinfo.html. You do not have to be registered to view the archive on the website.

CEDS Issues at the gitHub repository: Note that known issues with the current CEDS data (both aggregate and gridded) are documented there. If you find an issue with the current CEDS data, please post an issue using the “Issues” tab of the repository so that that information is publically available and can be addressed.

The core CEDS project is funded by the US Department of Energy’s Earth System Modeling program. Sub-regional detail and use of satellite datasets is funded by NASA’s Atmospheric Composition Modeling and Analysis Program (ACMAP).