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Pages 205-208

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From page 205...
... emissions are a weighted combination of information coming from observations and prior flux estimates. The weight of prior versus observational constraints in the estimated emissions is determined by the input uncertainties of observational and prior emissions where the uncertainty of observational information reflects measurement uncertainty as well as the ability to accurately simulate atmospheric concentration at measurement sites.
From page 206...
... of the natural gas. Blowdowns: Natural gas released due to maintenance and/or depressurization operations including compressor depressurization, pipeline depressurization, and emergency shutdown system testing (EPA, 2016b)
From page 207...
... Development of a gridded inventory may include the use of the U.S. Environmental Protection Agency Greenhouse Gas Inventory data or other datasets and disaggregation of this inventory using state-, county-, local-, and point-sourcelevel databases to allocate emissions to individual source types (e.g., Maasakkers et al., 2016)
From page 208...
... from hydrogen and carbon dioxide. Top-down method: Approaches based on atmospheric measurements that are directed toward estimating emissions from regions that could include multiple facilities (Heath et al., 2015)

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