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Title: Community Emissions Data System


CEDS produces consistent estimates of global air emissions species data during the industrial era (1750 - present).

Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
OSTI Identifier:
Report Number(s):
CEDS; 005416MLTPL00
Battelle IPID 31194-E
DOE Contract Number:
Resource Type:
Software Revision:
Software Package Number:
Software CPU:
Open Source:
Available on GitHub; url posted on PNNL software store
Source Code Available:
Other Software Info:
Available on GitHub; url listed on PNNL software store.
Country of Publication:
United States

Citation Formats

. Community Emissions Data System. Computer software. Vers. 00. USDOE. 21 Aug. 2017. Web.
. (2017, August 21). Community Emissions Data System (Version 00) [Computer software].
. Community Emissions Data System. Computer software. Version 00. August 21, 2017.
title = {Community Emissions Data System, Version 00},
author = {},
abstractNote = {CEDS produces consistent estimates of global air emissions species data during the industrial era (1750 - present).},
url = {},
doi = {},
year = 2017,
month = 8,
note =

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  • This package contains documentation of the Flexible Regional Emissions Data System (FREDS) for the 1980 NAPAP Emissions Inventory, FREDS source code, allocation factor files, and peripheral data files. FREDS extracts emissions data, pertinent modeling parameters (e.g., stack height, exhaust-gas temperature, etc.) and source-identification information from Emissions Inventory System (EIS) Master File records or preprocessed Statistical Analysis System (SAS) files and applies appropriate temporal, spatial, and pollutant-species allocation factors to derive a gridded, speciated, and temporally resolved emissions file suitable as input to regional scale atmospheric simulation models (such as the Regional Acid Deposition and Regional Oxidant Models). FREDS consists ofmore » five main modules which are used to apply allocation-factors to the annual emissions data, plus peripheral software used to ensure the quality of and maintain the allocation factor files. Separate programs are used to process point and area sources. Each module requires a user-defined control-options file. The five primary modules are the Model Data Extraction Module (MDEM), the Temporal Allocation Module (TAM), the Speciation Module (SM), the Spatial Allocation Module (SAM), and the Model Input Preprocessor (MIP). To maximize flexibility, FREDS allows the user to define and assign emissions of up to 15 pollutants (referenced by SAROAD code), the temporal scenario, spatial grid origin and grid cell size, and the number and relationship of pollutant subspecies. FREDS' modules are written in the language of the Statistical Analysis System...Software Description: The model is written in the SAS programming language for implementation on a IBM 3090 Computer using the OS/TSO operating system. Memory requirement is 1536 K bytes.« less
  • Historical emission estimates for anthropogenic aerosol and precursor compounds are key data needed for Earth system models, climate models, and atmospheric chemistry and transport models; both for general analysis and assessment and also for model validation through comparisons with observations. Current global emission data sets have a number of shortcomings, including timeliness and transparency. Satellite and other earth-system data are increasingly available in near real-time, but global emission estimates lag by 5-10 years. The CEDS project will construct a data-driven, open source framework to produce annually updated emission estimates. The basic methodologies to be used for this system have beenmore » used for SO2 (Smith et al. 2011, Klimont, Smith and Cofala 2013), and are designed to complement existing inventory efforts. The goal of this system is to consistently extend current emission estimates both forward in time to recent years and also back over the entire industrial era. The project will produce improved datasets for global and (potentially) regional model, allow analysis of trends across time, countries, and sectors of emissions and emission factors, and facilitate improved scientific analysis in general. Consistent estimation of uncertainty will be an integral part of this system. This effort will facilitate community evaluation of emissions and further emission-related research more generally.« less
  • Here, we present a new data set of annual historical (1750–2014) anthropogenic chemically reactive gases (CO, CH 4, NH 3, NO x, SO 2, NMVOCs), carbonaceous aerosols (black carbon – BC, and organic carbon – OC), and CO 2 developed with the Community Emissions Data System (CEDS). We improve upon existing inventories with a more consistent and reproducible methodology applied to all emission species, updated emission factors, and recent estimates through 2014. The data system relies on existing energy consumption data sets and regional and country-specific inventories to produce trends over recent decades. All emission species are consistently estimated using the samemore » activity data over all time periods. Emissions are provided on an annual basis at the level of country and sector and gridded with monthly seasonality. These estimates are comparable to, but generally slightly higher than, existing global inventories. Emissions over the most recent years are more uncertain, particularly in low- and middle-income regions where country-specific emission inventories are less available. Future work will involve refining and updating these emission estimates, estimating emissions' uncertainty, and publication of the system as open-source software.« less
  • Title IV (Acid Deposition Control) of the Clean Air Act Amendments of 1990 requires annual reductions of 10 million tons of sulfur dioxide and substantial reductions of nitrogen oxides from electric utilities. These reductions will occur in two phases with Phase 1 beginning in 1995. To ensure the reduction goals are met, affected utilities must monitor their emissions, perform quality assurance and quality control tests, and report the data to EPA as required by 40 CFR Part 75. EPA`s Emissions Tracking System (ETS) was developed to analyze all submitted data reports and to provide the annual emissions data needed tomore » determine whether utilities comply with their allowable SO{sub 2} emissions. EPA received the first quarterly reports from Phase 1 utilities at the end of January, 1994. A substantial number of these initial reports exhibited major problems and EPA required many utilities to improve and resubmit their reports. Data reports for the following three quarters of 1994 showed continual improvement as utilities gained experience in operating and improving their monitoring hardware and software and as EPA clarified published guidance. Helpful utility comments enabled EPA to correct and refine ETS. Phase 2 will affect approximately 700 additional plants. These plants will begin reporting their emissions data to EPA at the beginning of May, 1995. EPA is improving data handling and processing procedures and expanding the ETS software system capabilities to receive and process the substantial increase in submitted data during 1995.« less

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