Quantifying Methane and Ozone Precursor Emissions from Oil and Gas Production Regions across the Contiguous US.
Environ Sci Technol
; 55(13): 9129-9139, 2021 07 06.
Article
em En
| MEDLINE
| ID: mdl-34161066
ABSTRACT
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 â¼25% 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 â¼10% 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 â¼40% lower, while inferred CH4 and NMVOC emissions are up to a factor of â¼2 higher. This suggests that NMVOC/NOx emissions from oil and gas basins are â¼3 times higher than current estimates and will likely affect how air quality models represent ozone formation downwind of oil and gas fields.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ozônio
/
Poluentes Atmosféricos
Tipo de estudo:
Prognostic_studies
Idioma:
En
Revista:
Environ Sci Technol
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Estados Unidos