Institute of Environmental Diagnostics and Water Research (IDAEA-CSIC), Jordi Girona 18, 08034, Barcelona, Catalonia, Spain.
Environ Sci Pollut Res Int. 2010 Jul;17(6):1207-16. doi: 10.1007/s11356-010-0296-0. Epub 2010 Feb 6.
BACKGROUND, AIM AND SCOPE: Ambient air concentrations of polycyclic aromatic hydrocarbons (PAH) were determined at five elevated mountain sites on the European continent and the Atlantic Ocean. All sites can be considered remote background areas since they are situated above the timberline and they lack local emission sources of these compounds.
Average gas phase concentrations of SigmaPAH were 165, 1,475, 1,553, 1,822 and 4,443 pg m(-3) for Tenerife, Pyrenees, Central Norway, Tyrolean Alps and High Tatras, respectively. Particulate phase concentrations were 55, 70, 383, 196 and 708 pg m(-3), respectively. The PAH profiles of samples from the different sites are very similar, being typical of PAH mixtures after long-range atmospheric transport. Part of the fluctuations in PAH concentrations are explained by the influence of temperature on the particulate/gas phase partitioning.
The differences in PAH levels between sites, with the lowest concentrations found in Tenerife and the highest in the High Tatras, suggest the geographical influence of regional emissions on the sites, especially in the cold periods and for the sites in the eastern sector of the European continent. This is supported by air mass back-trajectories analysis for the samples on the different sites. The influence of the continent is not detectable in the case of the elevated site of Tenerife where the free troposphere has been sampled. The results in this study are consistent with the PAH levels found in soils and/or high mountain lake sediments from these areas.
背景、目的和范围：在欧洲大陆和大西洋的五个高山地点测定了多环芳烃（PAH）的环境空气浓度。所有这些地点都可以被认为是偏远的背景区域，因为它们位于林线以上，并且缺乏这些化合物的本地排放源。
西格玛 PAH 的平均气相浓度分别为 165、1475、1553、1822 和 4443 pg m(-3)，对应的地点分别是特内里费岛、比利牛斯山脉、挪威中部、蒂罗尔阿尔卑斯山和高塔特拉山。颗粒相浓度分别为 55、70、383、196 和 708 pg m(-3)。不同地点的样品 PAH 分布非常相似，是长距离大气传输后 PAH 混合物的典型特征。部分 PAH 浓度的波动可以用温度对颗粒/气相分配的影响来解释。
不同地点之间的 PAH 水平差异很大，特内里费岛的浓度最低，而高塔特拉山的浓度最高，这表明区域排放对这些地点的地理位置有影响，特别是在寒冷时期和欧洲大陆东部地区的地点。这得到了不同地点的样本的大气团回溯轨迹分析的支持。在被采样的自由对流层的特内里费岛的高空站点，无法检测到大陆的影响。本研究的结果与这些地区的土壤和/或高山湖泊沉积物中的 PAH 水平一致。
