1
|
Maasakkers JD, Jacob DJ, Sulprizio MP, Turner AJ, Weitz M, Wirth T, Hight C, DeFigueiredo M, Desai M, Schmeltz R, Hockstad L, Bloom AA, Bowman KW, Jeong S, Fischer ML. Gridded National Inventory of U.S. Methane Emissions. Environ Sci Technol 2016; 50:13123-13133. [PMID: 27934278 DOI: 10.1021/acs.est.6b02878] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We present a gridded inventory of US anthropogenic methane emissions with 0.1° × 0.1° spatial resolution, monthly temporal resolution, and detailed scale-dependent error characterization. The inventory is designed to be consistent with the 2016 US Environmental Protection Agency (EPA) Inventory of US Greenhouse Gas Emissions and Sinks (GHGI) for 2012. The EPA inventory is available only as national totals for different source types. We use a wide range of databases at the state, county, local, and point source level to disaggregate the inventory and allocate the spatial and temporal distribution of emissions for individual source types. Results show large differences with the EDGAR v4.2 global gridded inventory commonly used as a priori estimate in inversions of atmospheric methane observations. We derive grid-dependent error statistics for individual source types from comparison with the Environmental Defense Fund (EDF) regional inventory for Northeast Texas. These error statistics are independently verified by comparison with the California Greenhouse Gas Emissions Measurement (CALGEM) grid-resolved emission inventory. Our gridded, time-resolved inventory provides an improved basis for inversion of atmospheric methane observations to estimate US methane emissions and interpret the results in terms of the underlying processes.
Collapse
Affiliation(s)
- Joannes D Maasakkers
- School of Engineering and Applied Sciences, Harvard University , Pierce Hall, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Daniel J Jacob
- School of Engineering and Applied Sciences, Harvard University , Pierce Hall, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Melissa P Sulprizio
- School of Engineering and Applied Sciences, Harvard University , Pierce Hall, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Alexander J Turner
- School of Engineering and Applied Sciences, Harvard University , Pierce Hall, 29 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Melissa Weitz
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Tom Wirth
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Cate Hight
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Mark DeFigueiredo
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Mausami Desai
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Rachel Schmeltz
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Leif Hockstad
- Climate Change Division, Environmental Protection Agency , Washington, District of Columbia 20460, United States
| | - Anthony A Bloom
- Jet Propulsion Laboratory, California Institute of Technology , Pasadena, California 91109, United States
| | - Kevin W Bowman
- Jet Propulsion Laboratory, California Institute of Technology , Pasadena, California 91109, United States
| | - Seongeun Jeong
- Energy Technologies Area, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| | - Marc L Fischer
- Energy Technologies Area, Lawrence Berkeley National Laboratory , Berkeley, California 94720, United States
| |
Collapse
|