Big Sky Carbon Sequestration Partnership Quarterly Report: July-September 2004 Page: 10 of 134
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geological and terrestrial sequestration sinks, compilation of data, and identifying and cataloging
industrial and agricultural GHG sources. The Partnership Geologic Sequestration and
Geographical Information System (GIS) support has focused on the creation of a database
structure for collection of geologic sequestration data and summarizing the types of
infrastructure information that are being collected in Idaho, Montana, and contiguous geologic
regions of Wyoming. The Partnership has developed a uniform strategy for assessing the
mineralization trapping potential across rocks types. These capabilities are being used to
determine the geologic sequestration potential in the Big Sky region. We have established a
geological sink assessment approach and screening criteria, and nearing completion on
compiling county-level data on tillage and land use for the terrestrial component. Both the
geological and terrestrial component is resulting in data layers that will allow us to assess the
suitability for carbon sequestration in the Big Sky Partnership region as well as the potential for
locating future energy facilities in our region.
For geological sinks, the potential for subsurface formation of carbon dioxide sequestration
focused on solubility and mineralization trapping, and examined the technical feasibility, the
time frame until implementation, and offsetting economic benefits. For the terrestrial sinks, the
methodologies have been focusing on both technical and economic feasibility. Increasing soil C
levels are dependent upon both the technical capacity of the soils to sequester and utilize
additional carbon, and the incentives provided for landowners to change land use management
practices. Activities to identify sources and assessment of transportation infrastructure are
currently focused on identifying the state and federal databases and agencies, and addressing
uncertainties inherent in matching/combining data sources. (See Appendix to this fourth quarter
report)
Task 1. The Partnership's and South Dakota School of Mines and Technology's responsibilities
included the preparation of major GHG source inventories for SD, MT and ID. With the
exception of terrestrial (land-use related) sources, this inventory is largely complete. We used
EPA-EIIP inventory methodologies, with local supplementation where possible, to develop
aggregate estimates of greenhouse gas (GHG) emissions over the 2000-2002 period for each
state. Point-sources of CO2, N20, CH4 and trace GHGs included energy utilities, petroleum
processing and other industrial facilities. We also developed sectoral estimates of energy-related
emissions based on data from the DOE-EIA. Methane and N20 emissions from agricultural
activities, primarily livestock, were based on Census of Agriculture data on livestock
populations. Estimates of emissions from forest land-use change were drawn from a US Forest
Service report on forest carbon stocks. Estimates of net emissions due to agricultural land
management changes, which will be derived from the CENTURY model, are under
development. The same process will allow us to estimate terrestrial sink potential in this region.
Idaho, Montana and South Dakota emitted approximately 11.7, 3.0 and 10.1 MMTCE,
respectively, in 2002, or 9, 3 and 13 MTCE per capita. Although Idaho and Montana had larger
industrial emissions, these were offset by increases in forest C uptake. Because a large
proportion of Idaho's energy is produced by hydroelectric power, its largest category of
emissions is imported electricity; the same is true in South Dakota. In Montana, petroleum
refining and other heavy industry constitutes the largest GHG source category. Livestock-related
GHG emissions also comprise 15% of South Dakota's GHG emissions.10
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Capalbo, Susan M. Big Sky Carbon Sequestration Partnership Quarterly Report: July-September 2004, report, October 31, 2004; United States. (https://digital.library.unt.edu/ark:/67531/metadc781660/m1/10/: accessed April 23, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.