期刊
ELEMENTA-SCIENCE OF THE ANTHROPOCENE
卷 6, 期 -, 页码 -出版社
UNIV CALIFORNIA PRESS
DOI: 10.1525/elementa.284
关键词
methane; greenhouse gases; fossil fuels; oil and gas industry; Canada; downwind measurements
资金
- Environmental Defense Fund (EDF)
We performed ground-based measurements (downwind, site-wide characterization) of methane emissions from older light oil and natural gas production sites in Alberta, Canada (Red Deer region, 60 measured sites). We developed a distribution of site-based methane emissions and as previously found in production regions in the United States, a small fraction of the sites account for the majority of methane emissions: 20% of the sites emit three quarters of the methane from oil and gas production. Using empirically derived emission factors, we compared an estimate of regional methane emissions, to a top-down airborne-based measurement of the same region. The airborne measurement was 35% lower, though not statistically different (4,800 +/- 3,200 vs. 3,100 +/- 2,200 kg CH4 h(-1)). In Alberta, the majority of these oil and gas emissions go unreported under current reporting requirements. Effective mitigation will most likely require frequent monitoring to identify high-emitting sites as well as leaky components that we hypothesize are also a major contributor to emissions.
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