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* Update readme.
* Set release version number.
* Update units file
* Update UNFCCC emissions and scaling mapping for GHGs
* Add non-comb emission inventory default assumptions, largely for Annex I CO2
* Update MEIC 2018 scaling methods
* Fix usa energy user input sector mapping
* Eliminate soil emissions discontinuity in idn N2O and pak NOx
* Update SKorea inventory input files and mappings
* Add NH3 to S Korea inventory.
* Improve match to off road inventory estimates by assuming usa and can commercial sector diesel fuel is off-road mobile
* Default user and system combustion EF and non-combustion emission files now explicitly sorted for consistency
* Update to most recent satellite data for SO2 refinery/fugitive emissions. Use refinery throughput for extrapolation
* Update to consistently represent China iron smelting SO2
* Fix China BC/OC Coke emissions
* Add BC/OC controls for recent years in China
* Add usa can rail EF trends
* Add USA off-road IEA energy data corrections
* Overwrite Ethiopia and Nigeria residential biomass consumption with valued based no UN data instead of IEA.
* Add BC/OC for fossil-fuel fires.
* Remove 2004 discontinuity in USA inventory data MISC sector
* Scale BC/OC road transportation to country inventory PM2.5
* Added maximum road BC/OC EF pathway
* Fix outlier values in GAINS default EF generation
* remove iso's in edgar scaling that are scaled by country inventories
* update Australia inventory with 2018/2019 year, add NH3, updated mapping file
* Removed Australia soil-emissions from scaling - these emissions not included in AUS inventory
* Remove AgriOther from EMEP scaling which includes AWB, which is not included in CEDS
* Updated SPEW process (coke oven) BC and OC emissions with aggregate countries (e.g FSU) are not included for earlier years
* Add oil production driver for emissions extension
* Remove outdated figure generation scripts
# 1) CEDS user-defined energy inputs, metadata, and instructions (U.*.csv)
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# 2) Relevant mapping and instructions files for user-defined energy input which require pre-processing for use in CEDS (A.*-instructions.csv, A.*_sector_map.csv, A.*-mapping.xlsx)
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# CEDS
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The Community Emissions Data System (CEDS) produces consistent estimates of global air emissions species over the industrial era (1750 - present). 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](#license-section).
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***
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**Code Update:** December 28, 2020. This code update adds N2O emissions and updates CH4 and CO2 data. See the [release notes](https://github.com/JGCRI/CEDS/wiki/Release-Notes) for further details. Emissions data will be included in the upcoming full release.
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**Pre-Release:** September 11, 2020. The current code and data in this repository is associated with a pre-release set of data for review and assessment.
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**Feb 2021 Release:** February 05, 2021 (v\_2021\_02\_05)
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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](https://essd.copernicus.org/preprints/essd-2020-103/). Major features:
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This pre-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](https://essd.copernicus.org/preprints/essd-2020-103/). This pre-release focuses on aerosol and ozone precursor emissions.
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* Emissions estimates to 2019
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* Updated default data from GAINS and EDGAR
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* Updates to country inventories used for scaling
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* Improved BC/OC emission time series
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* Improved consistency over time
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* Updated code and driver data
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For details on this release see:
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* See the [release notes](https://github.com/JGCRI/CEDS/wiki/Release-Notes) for a summary of changes and notes on **known issues** with this dataset that are currently being addressed.
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*[Graphs of emission differences](./documentation/Version_comparison_figures_v_2020_09_11_vs_v_2019_12_23.pdf) between this version and the previous December 2019 CEDS data release.
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*[Graphs of emission differences](./documentation/Version_comparison_figures_v_2020_09_11_vs_v_2016_07_16(CMIP6).pdf) between this version and the CEDS CMIP6 data release documented in Hoesly et al (2018a).
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* Emissions by country and sector, archived [here](https://zenodo.org/record/4025316).
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* See the [release notes](https://github.com/JGCRI/CEDS/wiki/Release-Notes) for a summary of changes.
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*[Graphs of emission differences](./documentation/Version_comparison_figures_v_2021_02_05_vs_v_2016_07_16(CMIP6).pdf) between this version and the CEDS CMIP6 data release documented in Hoesly et al (2018a).
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*[Graphs of emission differences](./documentation/Version_comparison_figures_v_2021_02_05_vs_v_2019_12_23.pdf) between this version and the previous December 2019 CEDS data release.
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* Emissions by country and sector, archived [here](http://doi.org/10.5281/zenodo.4509372).
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We encourage comments on this data. The best way to comment on the data is through the [CEDS Issues](https://github.com/JGCRI/CEDS/issues) page.
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_Gridded data corresponding to this release is in production and will be released shortly._
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We encourage assessment of and comments on this pre-release data. The best way to comment on the data is through the [CEDS Issues](https://github.com/JGCRI/CEDS/issues) page. A full release is in progress for fall 2020 and will incorporate as many comments as possible.
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_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._
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We do not anticipate substantial changes to the CEDS system structure prior to the fall 2020 full release.
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***
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Documentation of CEDS assumptions and system operation, including a user guide, are available at the [CEDS project wiki](https://github.com/JGCRI/CEDS/wiki) and in the journal papers noted below.
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Current issues with the data or system are documented in the [CEDS Issues](https://github.com/JGCRI/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.)*
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Current issues with the data or system are documented in the [CEDS Issues](https://github.com/JGCRI/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.)*
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Further information can also be found at the [project web site](http://www.globalchange.umd.edu/ceds/), including a [CMIP6 page](http://www.globalchange.umd.edu/ceds/ceds-cmip6-data/) that provides details for obtaining gridded emission datasets produced by this project for use in CMIP6.
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Further information can also be found at the [project web site](http://www.globalchange.umd.edu/ceds/), including a [CMIP6 page](http://www.globalchange.umd.edu/ceds/ceds-cmip6-data/) that provides details for obtaining gridded emission datasets produced by this project for use in CMIP6. You can also sign up for data release announcements from the CEDSinfo listserv following the instructions on the [project web site](http://www.globalchange.umd.edu/ceds/).
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If you plan to use the CEDS data system for a research project you are encouraged to contact [Steve Smith](mailto:ssmith@pnnl.gov) 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.
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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 ill be noted in the [release notes](https://github.com/JGCRI/CEDS/wiki/Release-Notes).
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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](https://github.com/JGCRI/CEDS/wiki/Release-Notes).
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CEDS has only been possible through the participation of many collaborators. Our **collaboration policy** is that collaborators who contribute 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.
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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.
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# Data Reference
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Reference for [this data version](https://github.com/JGCRI/CEDS/wiki/Release-Notes):
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O'Rourke, Patrick R, Smith, Steven J., McDuffie, Erin E., Crippa, Monica, Klimont, Zbigniew, Mott, Andrea, Wang, Shuxiao, Nicholson, Matthew B, Feng, Leyang, and Hoesly, Rachel M. (2020, September 11). CEDS v-2020-09-11 Pre-Release Emission Data 1975-2019 (Version Sept-11-2020). [Zenodo. http://doi.org/10.5281/zenodo.4025316](http://doi.org/10.5281/zenodo.4025316).
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O'Rourke, P. R, Smith, S. J., Mott, A., Ahsan, H., McDuffie, E. E., Crippa, M., Klimont, S., McDonald, B., Z., Wang, Nicholson, M. B, Feng, L., and Hoesly, R. M. (2021, February 05). CEDS v-2021-02-05 Emission Data 1975-2019 (Version Feb-05-2021). [Zenodo. http://doi.org/10.5281/zenodo.4509372](http://doi.org/10.5281/zenodo.4509372).
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# Journal Papers
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[Hoesly et al, Historical (1750–2014) anthropogenic emissions of reactive gases and aerosols from the Community Emissions Data System (CEDS). ](https://www.geosci-model-dev.net/11/369/2018/gmd-11-369-2018.html)_Geosci. Model Dev._ 11, 369-408, 2018a.
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