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Smith, Steven J (PNNL-JGCRI) edited this page Feb 9, 2021 · 22 revisions

CEDS Release Notes

DOI (any CEDS release): 10.5281/zenodo.3592072

The DOI above will resolve to the latest CEDS data system release

Last update: Feb 08 2021

System Release: February 05, 2020 (CEDS v_2021-02-05)

Release of CEDS code and input data. Updates include:

  • UNFCCC Annex I (CH4, N2O, CO2), Australia, and South Korea emission inventory data

  • Scaling mappings and methods for improved consistency over time

  • Historical USA energy time series and sectoral split

  • Improved BC/OC industrial emissions in China

  • Lower residential biomass consumption for Ethiopia and Nigeria based on UN data

  • Added BC/OC from fossil fuel fires from EDGAR

  • BC/OC emissions from road sector now scaled to most country inventories

  • Updated satellite estimates of SO2 from petroleum processes

  • Various data and code updates

Code-Release: December 28, 2020 (CEDS v_2020-12-28)

Updates CEDS code and input data to add N2O as an emission species. Updates CH4 and CO2 emissions input data.

  • Added N2O as new emission species

  • Added scaling for updated UNFCCC emissions data format for CH4 and N2O

  • Updated RCP back-extension to match 1970 totals

  • Add additional fugitive emissions sectors breaking out oil from natural gas, and splitting natural gas production from distribution. Note that the previous aggregate fugitive oil and gas sector no longer exists. (Note that data to allocate emissions between these sectors was not available for all species.) The new sectors are:

    • 1B2_Fugitive-petr

    • 1B2b_Fugitive-NG-prod

    • 1B2b_Fugitive-NG-distr

  • Add additional non-combustion sectors specific to N2O:

    • 2B2_Chemicals-Nitric-acid

    • 2B3_Chemicals-Adipic-acid

    • 7B_Indirect-N2O-non-agricultural-NOx

    • 7C_Indirect-N2O-non-agricultural-NH3

  • Update CO2 cement to Andrew (2019)

  • Add Puerto Rico cement CO2 emissions (missing from Andrew)

  • Added crude oil production as driver for fugitive petroleum emissions

  • Other misc changes

Pre-Release: September 11, 2020 (CEDS v_2020-09-11)

DOI (CEDS v_2020-09-11): 10.5281/zenodo.4025316

Many changes throughout with time series extended to 2019. This is pre-release for air pollutant emissions that is being made available for comment and review. A final release version will follow this fall (2020) along with a journal paper submission. We recommend use of the final release version. We ask that anyone using this dataset use both the citation for this specific data version and the journal paper citation once that is available.

Data updates

  • Updated to use IEA energy statistics out to 2017

  • Extended time series to 2019 using BP energy statistics

  • Updated default combustion emission factors to ECLIPSE V5a

  • Updated default emissions to EDGAR v5

  • Updated country-level emission inventories for Europe, USA, Canada, China, and Taiwan.

  • Default emissions for China incorporate changes in coke production (Xu et al. 2019) and cement technologies (Hua et al. 2016) over time.

  • Corrected heavy oil CO2 emissions factor (lowering CO2 emissions) (issue 22)

  • Update shipping emissions to IMOGHGv4 emission factors and fuel consumption.

  • Aircraft EF updated to EDGAR v5

  • Canada and USA now include agricultural NOx emissions (fixes issue #17 )

  • USA NMVOC discontinuity removed (issue 26)

  • Updated default time series for smelting SO2 emissions

System operational changes:

  • CEDS now uses renv package to manage packages to better assure reliable operation

  • Emission inventory scaling and instruction files now use .csv format for improved version control

Known Issues

These are known issues that we are working to resolve for the full release.

  • Agricultural waste burning on fields (AWB) is included for some European countries. This should not be included in CEDS and results in some double-counting.

  • USA off-road emissions are underestimated due to a mis-match between CEDS/IEA sector definitions and US inventory sector definitions.

  • Residential biomass consumption, and associated emissions, for some countries in Africa may be overestimated (see discussion in McDuffie et al. 2020).

Data Updates in Progress

  • Additional updated country inventory data will be included.

  • Updated CO2, CH4, and (new) N2O emissions will be added.

  • BC and OC emissions are not calibrated to country inventories. We are working to include this capability for key sectors.

  • Gridded proxy data has not been updated. Spatial distributions within countries, therefore, generally do not change after 2010 gridded data generated by this release.

Maintenance Updates: January 13, 2019 (CEDS v_2020-01-13)

There are no changes to CEDS emission output values relative to v_2019-12-23 as a result of this release.

  • Fixed file line feed format for two files to avoid errors on some systems

  • Updated README file to link to v_2019-12-23 data files and comparison graphs

  • Added v_2019-12-23 comparison graphs file

  • Removed out of date documentation files

First Full Release: December 23, 2019 (CEDS v_2019-12-23)

DOI (CEDS v_2019-12-23): 10.5281/zenodo.3592073

Suggested Citation for this version of CEDS:

Hoesly, Rachel; O’Rourke, Patrick; Braun, Caleb; Feng, Leyang; Smith, Steven J.; Pitkanen, Tyler; Seibert, Jonathan J.; Vu, Linh; Muwan, Presley; Bolt, Ryan; Goldstein, Ben; Kholod, Nazar (2019, December 23). Community Emissions Data System (Version Dec-23-2019). Zenodo. http://doi.org/10.5281/zenodo.3592073

Graphs of emission differences between this release and the CMIP6 release are available at https://github.com/JGCRI/CEDS/documentation/Version_comparison_figures_v_2019_12_23.pdf

Emissions by country and sector, archived [here](https://zenodo.org/record/3606753).

Changes:

  • Fixed accounting of global shipping fuel consumption (this is largely fixing a bias introduced in a previous pre-release. However, in current version, some shipping emissions before the IEA data period are shifted from international shipping to domestic navigation. This does not substantially impact total emissions, but will impact the spatial distribution as compared to the CMIP6 data release.)

  • Corrections to addition of EIA historical coal consumption data for the USA

  • Corrections to addition of historical coal consumption data for Germany

  • Negative energy consumption data from historical UN statistics removed

  • Metadata tracking within the system now correctly removes duplicate entries

  • Users providing CEDS with total fuel consumption for a country can now choose if international shipping bunkers are included or not

  • Users providing CEDS with fuel consumption for a country can now choose if data should be normalized to CEDS default values or not after inclusion

  • Updated waste emissions calculation with fix to code and more realistic developed country urban burnt percentage parameter

  • Improved consistency of Korea BC and OC emissions with Korea national inventory addressing, in part, issue 5

(Also included are all the changes noted below.)

Pre-release Version: August 25, 2019

  • Updated waste emissions to use more realistic assumption for fraction burnt. Updated India per-capita waste generation to match recent literature estimate.

  • Fixed ordering of incorporation of user-added energy data

  • Improved consistency of unit conversions throughout code

  • India emissions now generally calibrated to GAINS emission factors

  • USA emissions now scaled to most recent EPA Trends data

  • Minimum transportation emission factor pathways updated

  • Aggregate industrial sector emissions seasonality changed to flat for all countries. Addresses issue with industrial seasonality

  • Other improvements

  • User guide additions

Pre-release Version: July 17, 2019

  • Code updates to facilitate use of newer versions of the BP energy statistics

  • BP 2019 statistics now used for energy data extension

  • Substantial speed-up of historical energy data processing in Module A, particularly on some cluster systems.

  • Wiki updated with instructions on how to download data files needed for gridding.

  • User guide additions.

Pre-release Version: June 7, 2019

  • Added capability for users to add exogenous historical energy data. This has been implemented for coal in the USA, UK, and Germany.

  • Hard and brown coal consumption by country extended back to 1950 (before IEA data years) using data from UN Energy statistics

  • Major changes to code structure with activity data for all years processed before any emissions-specific data processing.

  • Fuel allocation to sectors improved over early to mid 20th century (1920 - the earliest year of IEA data)

  • Other code improvements and fixes including BC spike in Netherlands, USA SO2 1960s overestimate

CMIP6 Data Release (data only) July 26, 2016

Historical emissions data as used for CMIP6, as described in 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.(https://www.geosci-model-dev.net/11/369/2018/gmd-11-369-2018.html)

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