Quantifying Methane and Ozone Precursor Emissions from Oil and Gas Production Regions across the Contiguous US
| Autor: | Michael Trainer, Colby Francoeur, Joost A. de Gouw, Carsten Warneke, Stuart A. McKeen, Chelsea R. Thompson, Ilana B. Pollack, Jeff Peischl, Meng Li, Barbara Dix, Jessica B. Gilman, Brian C. McDonald, Thomas B. Ryerson, Gregory J. Frost, Steven S. Brown, Kyle J. Zarzana |
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| Rok vydání: | 2021 |
| Předmět: |
chemistry.chemical_classification
Air Pollutants Ozone business.industry Fossil fuel Greenhouse gas inventory General Chemistry Natural Gas 010501 environmental sciences Atmospheric sciences 01 natural sciences Methane chemistry.chemical_compound chemistry Environmental Chemistry Environmental science Oil and Gas Fields Volatile organic compound Nitrogen oxide business Air quality index NOx 0105 earth and related environmental sciences |
| Zdroj: | Environmental Science & Technology. 55:9129-9139 |
| ISSN: | 1520-5851 0013-936X |
| DOI: | 10.1021/acs.est.0c07352 |
| Popis: | We present an updated fuel-based oil and gas (FOG) inventory with estimates of nitrogen oxide (NOx) emissions from oil and natural gas production in the contiguous US (CONUS). We compare the FOG inventory with aircraft-derived ("top-down") emissions for NOx over footprints that account for ∼25% of US oil and natural gas production. Across CONUS, we find that the bottom-up FOG inventory combined with other anthropogenic emissions is on average within ∼10% of top-down aircraft-derived NOx emissions. We also find good agreement in the trends of NOx from drilling- and production-phase activities, as inferred by satellites and in the bottom-up inventory. Leveraging tracer-tracer relationships derived from aircraft observations, methane (CH4) and non-methane volatile organic compound (NMVOC) emissions have been added to the inventory. Our total CONUS emission estimates for 2015 of oil and natural gas are 0.45 ± 0.14 Tg NOx/yr, 15.2 ± 3.0 Tg CH4/yr, and 5.7 ± 1.7 Tg NMVOC/yr. Compared to the US National Emissions Inventory and Greenhouse Gas Inventory, FOG NOx emissions are ∼40% lower, while inferred CH4 and NMVOC emissions are up to a factor of ∼2 higher. This suggests that NMVOC/NOx emissions from oil and gas basins are ∼3 times higher than current estimates and will likely affect how air quality models represent ozone formation downwind of oil and gas fields. |
| Databáze: | OpenAIRE |
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