Spatial and Temporal Comparison of Polycyclic Aromatic Hydrocarbons and Spheroidal Carbonaceous Particles in Remote European Lakes |
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Authors: | Fernández Pilar Rose Neil L Vilanova Rosa M Grimalt Joan O |
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Institution: | (1) Department of Environmental Chemistry (ICER-CSIC), Barcelona, Catalonia, Spain;(2) Environmental Change Research Centre, University College, London, U.K;(3) Department of Environmental Chemistry (ICER-CSIC), Barcelona, Catalonia, Spain |
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Abstract: | Spheroidal carbonaceous particles (SCP) and polycyclicaromatic hydrocarbons (PAH) have been measured in the dated sediment cores of 10 remote lakes distributed across Europe. The geographic trends were evaluated by examination of the superficial sediment fluxes and total sediment inventories. The highest levels of both markers were observed in the Eastern European lakes whereas the minimal values corresponded to the lake located in the Arctic. However, this SCP-PAH correlation was not observed after exclusion of the end member lakes from the series. The temporal trends of both pollutant markers are consistent with the history of pyrolytic emissions over Europe. However, the downcore SCP distributions are shorter than the PAH profiles in nearly all lakes. The differences are probably related to the different size particle fractions involved in the measurement of each marker, >5 and >1 m for SCP and PAH, respectively. Thus, the two proxies probably reflect pollution inputs from closer (SCP) and more distant sites (PAH). |
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Keywords: | polycyclic aromatic hydrocarbons remote lakes sediment inventories sediment profiles spheroidal carbonaceous particles |
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