A study to monitor Ultrafine Particles (UFP) at Heathrow Airport was undertaken in the autumn of 2017. The campaign followed on from a similar study in 2016, which put UFP at the airport into context with nearby measurements. The objective of the 2017 study was to undertake UFP monitoring at higher time resolution (60 second scans) and in a narrower particle size range (6 to 100 nm). High resolution data from the NOx, PM and Black Carbon analysers on site was also collected during the survey. Measurements were made at the runway station, LHR2 to attempt to characterise individual aircraft using the runway. Nucleation mode particles are again seen to predominantly originate from the airport, with highest concentrations associated with departing aircraft. While there is some correlation of nucleation particles with NOx and BC, these pollutants, together with PM mass and Aitken mode particles, also show strong associations with winds from off-airport directions. There is some evidence that BC emissions from landing aircraft are enriched in UV-active BC (UVPM), most likely as a result of tyre abrasion upon landing. Comparison of UFP measurements with the 2016 survey was not possible because of the differences in configuration of the SMPS for the two surveys. This observation demonstrates the importance of documenting SMPS configuration, to determine if comparison between published data is possible. Analysis of the 1 minute measurement data with associated aircraft departure information was used to group the data by aircraft type. Larger aircraft departing from the runway recorded higher measurements of nucleation particles and NOx compared to smaller aircraft, while emissions of BC, UVPM and NO₂ appear to be dependent upon the age of the engine design, rather than the size of the aircraft.

2017年秋天，在希思罗机场进行了一项监测超细颗粒物（UFP）的研究。此活动是在2016年进行的类似研究之后进行的，该研究将机场的UFP与附近的测量结果结合起来。2017年研究的目标是在更高的时间分辨率（60秒扫描）和更窄的粒径范围（6至100 nm）中进行UFP监测。在调查期间，还从现场收集了NOx，PM和Black Carbon分析仪的高分辨率数据。在LHR2跑道站进行了测量，以尝试表征使用跑道的单个飞机。再次看到成核模式粒子主要来自机场，并且与离场的飞机有关的浓度最高。虽然成核颗粒与NOx和BC之间存在一定的相关性，但这些污染物，PM质量和Aitken模态粒子也与非机场方向的风强相关。有证据表明，着陆飞机的不干胶排放物富含紫外线活性不干胶（UVPM），这很可能是着陆时轮胎磨损的结果。由于两次调查的SMPS配置不同，因此无法将UFP测量与2016年调查进行比较。该观察结果证明了记录SMPS配置以确定确定是否可以对已发布数据进行比较的重要性。1分钟测量数据与相关飞机离场信息的分析被用于按飞机类型对数据进行分组。与较小的飞机相比，较大的飞机从跑道起飞时，对成核颗粒和NOx的测量值较高，而BC的排放量为₂似乎取决于引擎设计的年龄，而不是飞机的大小。