CEDS

The Community Emissions Data System (CEDS) produces consistent estimates of global air emissions species (BC, CO, CO₂, NH₃, NMVOC, NO_x, OC, SO₂) over the industrial era (1750 - present) along with CH₄ and N₂O over recent decades. The system is written in R and uses open-source data (with the exception of the IEA energy statistics which must be purchased from IEA). CEDS is publicly available through an Open Source License.

April 2024 Release: April 1, 2024 (v_2024_04_01)

This data and code release updates driver and emissions data throughout and extends the emissions time series to 2022.

Major features include:

Emissions estimates to 2022
Updated default data from IEA, Energy Institute, EDGAR, and others
Updates to country inventories used for scaling
Refined recent year extension of liquid fuels
Emissions data now released with fuel and sector detail
Expanded representation of the metal smelting sector

For details on this release see:

See the release notes for a summary of data and methodology changes.
Graphs of emission differences between this version and the previous version and the CEDS CMIP6 data release as documented in Hoesly et al (2018a).
Emissions by country, fuel and sector, archived here.

We encourage comments on this data. The best way to comment on the data is through the CEDS Issues page.

Gridded data corresponding to this release is in production and will be released shortly.

A journal paper describing this dataset is in preparation. A notice will be updated here and sent to the CEDS listserv when this is available.

Documentation of CEDS assumptions and system operation, including a user guide, are available at the CEDS project wiki and in the journal papers noted below.

Current issues with the data or system are documented in the CEDS Issues system in this GitHub repository. Users can submit issues using this system. These can include anomalies found in either the aggregate or gridded emissions data. Please use an appropriate tag for any submitted issues. Note that by default only unresolved issues are shown. All issues, including resolved issues, can be viewed by removing the "is:open" filter. Issues relevant for CMIP6 data releases are tagged with a “CMIP6” label (note that issues will be closed when resolved in subsequent CEDS data releases, but are still available for viewing.)

Further information can also be found at the project web site, including a link to a page that provides details for obtaining gridded emission datasets produced by this project. You can also sign up for data release announcements from the CEDSinfo listserv following the instructions on the project web site.

If you plan to use the CEDS data system for a research project you are encouraged to contactRachel Hoesly or Steve Smith so that we can coordinate with any on-going work on the CEDS system and make sure we are not duplicating effort. CEDS is research software, and we will be happy to help and make sure that you are able to make the best possible use of this system.

Users should use the most recent version of this repository, which will include maintenance updates to address documentation or usability issues. Major changes that alter emission estimates or system structure and use will be noted in the release notes.

CEDS has only been possible through the participation of many collaborators. Our collaboration policy is that collaborators who contribute unpublished data used in CEDS updates will be included as co-authors on the journal paper that describes the next CEDS major release. We particularly encourage contributions of updated emission information from countries or sectors not well represented in the data currently used in CEDS.

Data Reference

A reference for this data version can be found in the release notes.

Journal Papers

Hoesly et al, Historical (1750–2014) anthropogenic emissions of reactive gases and aerosols from the Community Emissions Data System (CEDS). Geosci. Model Dev. 11, 369-408, 2018a.

Note that the paper zip file supplement contains annual emissions estimates by country and sector for the July 26, 2016 data version. Preivous versions of the data are otherwise available from the links below.

Feng et al, The generation of gridded emissions data for CMIP6. Geosci. Model Dev. 13, 461–482, 2020.

Previous Versions

April 2021 Release: April 21, 2021 (v_2021_04_21)

This release updates emissions for four isos: Australia, Canada, South Korea, and Taiwan as shown in Figure S9 here. Global trends are similar to the v_2021_02_05 release. Global gridded emission data have also been produced with updated spatial distributions for most sectors.

See the release notes for a summary of changes.
Graphs of emission differences between this version and the CEDS CMIP6 data release documented in Hoesly et al (2018a).
Graphs of emission differences between this version and the previous December 2019 CEDS data release.
Emissions by country and sector, archived here.
Gridded emissions in the same format as the CMIP6 data release are available at PNNL DataHub.

Feb 2021 Release: February 05, 2021 (v_2021_02_05)

This data and code release extends the emissions time series to 2019 and updates driver and emissions data throughout. This version builds on the extension of the CEDS system to 2017 described in McDuffie et al. 2020. Major features:

Emissions estimates to 2019
Updated default data from GAINS and EDGAR
Updates to country inventories used for scaling
Improved BC/OC emission time series
Improved consistency over time
Updated code and driver data