title: Additivity of state inventories of greenhouse-gas emissions.
abstract: In addition to national inventories of emissions of greenhouse gases, there are inventories for most, but not all, states constituting the United States. This paper analyzes the state inventories to see if reported emissions of carbon dioxide, methane, and nitrous oxide are additive. Considerable reanalysis of the state inventories is required before they can be added to yield a larger-scale inventory. Some specific sources were considered by some states but not by others. Estimation techniques evolved over time as inventories were produced, and there are instances of both double-counting (two states reporting the same emission) and omission (neither state reporting the same emission), where interstate transfers of energy or materials occurred. Nevertheless, the inventories, when adjusted for obvious double-counting or omissions, are probably approximately additive, although it is difficult to quantify the extent to which this is true.
authors.affiliation: Carbon Dioxide Information Analysis Center, Environmental Sciences Division, Oak Ridge National Laboratory, Tennessee 37831-6335, USA. cushmanrm@ornl.gov
authors.forename: Robert M
authors.initials: RM
authors.lastname: Cushman
mesh_terms: D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D002245:Carbon Dioxide / Q000032:analysis*; D004736:Energy-Generating Resources; D004784:Environmental Monitoring / Q000706:statistics & numerical data*; D017752:Greenhouse Effect; D008697:Methane / Q000032:analysis*; D009609:Nitrous Oxide / Q000032:analysis*; D012016:Reference Values; D014481:United States
chemical_list: D000393:Air Pollutants; D002245:Carbon Dioxide; D009609:Nitrous Oxide; D008697:Methane