Benzo(a)pyrene (BaP) is a Polycyclic Aromatic Hydrocarbon (PAH) well known for its carcinogenic effects. In this study, BaP levels in daily PM₁₀ samples collected at 8 stations in Barcelona (Spain), during the years 2013–2015, were analyzed in relation to distinct atmospheric circulation patterns. Our objective was to estimate the BaP inhalation related Lung Cancer Risk (LCR) in connection with the prevailing synoptic conditions. Air masses were also analyzed in order to examine the possibility of transboundary BaP contributions. The influence of high pressure anticyclonic systems caused a sharp increase of PM₁₀-bound BaP concentrations in all stations due to recirculation and accumulation of polluted air, whilst the calculated BaP inhalation related LCR values implied a potential health risk from BaP exposure and were not recommendable primarily at central heavily trafficked sites. However the LCR remained below the upper limit posed by United States Environmental Protection Agency (US EPA), even under the most stagnant atmospheric conditions. The elaboration of backward air mass trajectories with Concentration Weighted Trajectory (CWT) algorithm indicated that combustion emissions in Spain, France and the industrialized Northern coast of Algeria are potential contributors to the PM₁₀-bound BaP concentrations measured in Barcelona.

苯并（a）re（BaP）是一种多环芳烃（PAH），以其致癌作用而闻名。在这项研究中，分析了2013-2015年在西班牙巴塞罗那的8个站点采集的每日PM ₁₀样品中的BaP水平，并将其与不同的大气环流模式相关联。我们的目的是评估与当前天气状况相关的BaP吸入相关的肺癌风险（LCR）。还对气团进行了分析，以检查跨界BaP贡献的可能性。高压反气旋系统的影响导致PM ₁₀急剧增加由于再循环和污染空气的积累，所有站点中的约束BaP浓度都很高，而计算得出的与BaP吸入相关的LCR值暗示着BaP暴露有潜在的健康风险，因此主要在人口稠密的中部地区不建议这样做。但是，即使在最停滞的大气条件下，LCR仍低于美国环境保护署（US EPA）规定的上限。使用浓度加权轨迹（CWT）算法对后向空气质量轨迹进行的详细说明表明，西班牙，法国和阿尔及利亚工业化北部海岸的燃烧排放是对巴塞罗那测量的与PM ₁₀结合的BaP浓度的潜在贡献。