PDF(Pubmed)
Abstract：
Methane is a major contributor to anthropogenic greenhouse gas emissions. Identifying large sources of methane, particularly from the oil and gas sectors, will be essential for mitigating climate change. Aircraft-based methane sensing platforms can rapidly detect and quantify methane point-source emissions across large geographic regions, and play an increasingly important role in industrial methane management and greenhouse gas inventory. We independently evaluate the performance of five major methane-sensing aircraft platforms: Carbon Mapper, GHGSat-AV, Insight M, MethaneAIR, and Scientific Aviation. Over a 6 week period, we released metered gas for over 700 single-blind measurements across all five platforms to evaluate their ability to detect and quantify emissions that range from 1 to over 1,500 kg(CH4)/h. Aircraft consistently quantified releases above 10 kg(CH4)/h, and GHGSat-AV and Insight M detected emissions below 5 kg(CH4)/h. Fully blinded quantification estimates for platforms using downward-facing imaging spectrometers have parity slopes ranging from 0.76 to 1.13, with R2 values of 0.61 to 0.93; the platform using continuous air sampling has a parity slope of 0.5 (R2 = 0.93). Results demonstrate that aircraft-based methane sensing has matured since previous studies and is ready for an increasingly important role in environmental policy and regulation.
摘要：
甲烷是人为温室气体排放的主要贡献者。识别大量甲烷来源，特别是石油和天然气部门，对于缓解气候变化至关重要。基于飞机的甲烷传感平台可以快速检测和量化大型地理区域的甲烷点源排放，在工业甲烷管理和温室气体清查中发挥着越来越重要的作用。我们独立评估了五种主要甲烷传感飞机平台的性能：碳测绘仪，GHGSat-AV,InsightM,甲烷空气,科学航空。在6周的时间里，我们在所有五个平台上发布了700多个单盲测量的计量气体，以评估其检测和量化1,500kg（CH4）/h范围内的排放的能力。飞机持续量化释放量超过10kg(CH4)/h，GHGSat-AV和InsightM检测到排放量低于5千克(CH4)/小时。使用面向下的成像光谱仪的平台的完全盲化量化估计的奇偶校验斜率范围为0.76至1.13，R2值为0.61至0.93；使用连续空气采样的平台的奇偶校验斜率为0.5（R2=0.93）。结果表明，自先前的研究以来，基于飞机的甲烷传感已经成熟，并准备在环境政策和法规中发挥越来越重要的作用。
