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CO2 Stationary Sources
CO2 Stationary Source Emission Estimation Methodology
2012 Atlas IV
DOE's Regional Carbon Sequestration Partnerships (RCSPs) employed carbon dioxide (CO2) emissions estimate methodologies that are based on the most readily available representative data for that particular industry type within the respective partnership area. Carbon dioxide emissions data provided by databases (for example, eGRID, IEA GHG, or NATCARB) were the first choice for all of the RCSPs, both for identifying major CO2 stationary sources and for providing reliable emission estimations. Databases are considered to contain reliable and accurate data obtained from direct emissions measurements via continuous emissions monitoring (CEM) systems. One drawback of formal databases can be the delay between data collection and publication, but this does not present a significant problem for the RCSPs as the dates of information are clear. When databases were not available, stationary source facility production or fuel usage were coupled with CO2 emissions factors to estimate annual CO2 emissions from the production or fuel usage data. Emissions factors, fuel usage data, and facility production data were obtained from various databases, websites, and publications. Stationary source spatial location data (latitude and longitude) were determined from a variety of sources. Some databases (eGRID) contain latitude and longitude information for each stationary source. Where spatial location information was not available through an emissions database, other spatial location methods were utilized. These include the use of mapping tools (Google Earth, TerraServer, and USGS Digital Orthophoto Imagery) equipped with geospatially defined data, along with web-based databases (Travelpost) containing latitude and longitude information for various U.S. locations.

More information on the RCSPs' CO2 stationary source methodology is available in DOE's CO2 Stationary Source Emission Estimations Methodologies Summary. Detailed CO2 stationary source data is available in Atlas IV's Appendix D: CO2 Stationary Source and Geologic Storage Resource Estimates by States/Province.

All data, metadata, and high resolution jpgs are available on NATCARB's Data Download and Custom Maps Request webpage.

North American CO2 Sources  
United States and Canadian
CO2 Stationary Sources.

There are two different types of CO2 sources: natural and anthropogenic (manmade). Natural sources include respiration from animals and plants, volcanic eruptions, forest and grass natural fires, decomposition of biomass material (plants and trees), and naturally occurring sources in geologic formations. Anthropogenic sources result from human activity and include the burning of fossil fuels, cement production and other industrial processes, deforestation, agriculture, and changes in natural land usage. Although CO2 emissions from natural sources are estimated to be greater than the anthropogenic sources, natural sources are usually in equilibrium with a process known as the global carbon cycle, which involves carbon exchange between the land, ocean, and atmosphere Increases in anthropogenic emissions throughout the last 200 years have led to an overall increase in the concentration of CO2 and other greenhouse gases in the atmosphere.

The "CO2 Stationary Source Emissions by Category" pie chart contains values, gathered by the RCSPs and NATCARB (illustrated on the "United States and Canadian CO2 Stationary Sources" map), showing that CO2 stationary source emissions result largely from power generation, energy use, and industrial processes.

CO2 Stationary Source Emissions by Category
  CO2 Stationary Source
Emissions by Category.
CO2 Stationary Source Emissions by Regional Carbon Sequestration Partnership  

DOE's RCSPs have documented the location of 4,245 stationary CO2 sources (each emitting more than 100,000 metric tons per year) with total annual emissions of approximately 3,279 million metric tons of CO2. The "CO2 Stationary Source Emissions by RCSP and Canada" pie chart displays the amount of CO2 stationary source emissions identified by each RCSP.

CO2 Stationary Source Emissions
by RCSP and Canada.

CO2 Stationary Source Emission Estimates by RCSP/Region
RCSP Number of Sources CO2 Emissions
(million metric tons per year)
BSCSP 244 48
MGSC 311 291
MRCSP 443 670
PCOR* 926 517
SECARB 1,003 1,103
SWP 649 333
WESTCARB* 513 268
U.S. Non-RCSP** 156 49
Total 4,245 3,279
* Totals include Canadian sources identified by the RCSP.
** As of November 2012, "U.S. Non-RCSP" includes Connecticut, Delaware, Maine, Massachusetts, New Hampshire, Rhode Island, Vermont, and Puerto Rico.
*Data current as of December 2012.