Wolfson Atmospheric Chemistry Laboratories, University of York, York YO10 5DD, United Kingdom.
Ricardo Energy & Environment, Harwell, Oxfordshire OX11 0QR, United Kingdom.
Environ Sci Technol. 2020 Dec 15;54(24):15689-15697. doi: 10.1021/acs.est.0c05839. Epub 2020 Dec 2.
In this study, we use comprehensive vehicle emission remote sensing measurements of over 230,000 passenger cars to estimate total UK ammonia (NH) emissions. Estimates are made using "top-down" and "bottom-up" methods that demonstrate good agreement to within 1.1% for total fuel consumed or CO emitted. A central component of this study is the comprehensive nature of the bottom-up emission estimates that combine highly detailed remote sensing emission data with over 4000 km of 1 Hz real driving data. Total annual UK NH emissions from gasoline passenger cars are estimated to be 7.8 ± 0.3 kt from the bottom-up estimate compared with 3.0 ± 1.7 kt reported by the UK national inventory. An important conclusion from the analysis is that both methodologies confirm that gasoline passenger car NH emissions are underestimated by a factor of about 2.6 compared with the 2018 UK National Atmospheric Emissions Inventory. Furthermore, we find that inventory estimates of urban emissions of NH for passenger cars are underestimated by a factor of 17.
在这项研究中，我们使用了超过 23 万辆乘用车的综合车辆排放遥感测量来估算英国的氨（NH）总排放量。我们使用了“自上而下”和“自下而上”的方法进行估算，对于总燃料消耗或 CO 排放量，估算结果的一致性在 1.1%以内。这项研究的一个核心组成部分是，综合了详细的遥感排放数据和超过 4000 公里的 1 Hz 实际驾驶数据的自下而上的排放估算。与英国国家清单报告的 3.0 ± 1.7 kt 相比，自下而上的估算结果表明，汽油乘用车的英国 NH 年排放量估计为 7.8 ± 0.3 kt。分析的一个重要结论是，这两种方法都证实，与 2018 年英国国家大气排放清单相比，汽油乘用车的 NH 排放量被低估了约 2.6 倍。此外，我们发现，城市乘用车 NH 排放清单估计值被低估了 17 倍。
