Spatio-temporal patterns of PAHs, PCBs and HCB in sediments of the western Barents Sea

Abstract

We examine the composition and levels of organic contaminants (PAHs, PCB, HCB) in four sediment cores collected from the Barents Sea.We assess the influence of temporal variations in contaminant supplies and post-depositional reworking on contaminant distribution. Anthropogeniclevels of ∑12 PAH reached 95 ng g-1, higher inventories dominated by BKF were observed at southern stations, while northern stations exhibitedlower inventories with PHE as the dominant compound. The PCB composition was similar at all stations dominated by CB 101, 138 and 153. ∑7 PCBconcentrations were higher at northern stations. The observed composition and spatio-temporal pattern of organic contaminants is in accordance withlong-range transport supplies.

Keywords

• Arctic
• Organic contaminants
• POPs
• Sediment accumulation