Atmospheric polycyclic aromatic hydrocarbons in remote European and Atlantic sites located above the boundary mixing layer.
OBJECTIVE
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.


CONCLUSIONS
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.


CONCLUSIONS
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.
Institute of Environmental Diagnostics and Water Research (IDAEA-CSIC), Jordi Girona 18, 08034, Barcelona, Catalonia, Spain. barend.vandrooge@idaea.csic.es
Barend Leendert
BL
Van Drooge
Pilar
P
Fernández
Joan O
JO
Grimalt
Evzen
E
Stuchlík
Carlos J
CJ
Torres García
Emilio
E
Cuevas
D000392:Air Movements; D000393:Air Pollutants / Q000032:analysis*; D001267:Atlantic Ocean; D001272:Atmosphere / Q000737:chemistry*; D004784:Environmental Monitoring; D005060:Europe; D007700:Kinetics; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis*
D000393:Air Pollutants; D011084:Polycyclic Aromatic Hydrocarbons