Natural background and anthropogenic inputs of polycyclic aromatic hydrocarbons (PAH) in sediments of South-Western Barents Sea

International audience Polycyclic aromatic hydrocarbons (PAH) were measured in sediment cores from 13 locations in South-Western Barents Sea as part of a detailed study of the Norwegian seabed under the MAREANO program. The generally low PAH levels found, an average around 200 ng g dry weight for su...

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Bibliographic Details
Published in:Marine Environmental Research
Main Authors: Boitsov, Stepan, Jensen, Henning Keiding Bjerregård, Klungsøyr, Jarle
Other Authors: Institute of Marine Research Bergen (IMR), University of Bergen (UiB)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2009
Subjects:
PAH
TOC
sediments
radiodating
petrogenic
biogenic
pyrogenic
human impact
marine environment
MAREANO
Barents Sea
Online Access:https://hal.archives-ouvertes.fr/hal-00563089
https://hal.archives-ouvertes.fr/hal-00563089/document
https://hal.archives-ouvertes.fr/hal-00563089/file/PEER_stage2_10.1016%252Fj.marenvres.2009.06.013.pdf
https://doi.org/10.1016/j.marenvres.2009.06.013
Description
Summary:International audience Polycyclic aromatic hydrocarbons (PAH) were measured in sediment cores from 13 locations in South-Western Barents Sea as part of a detailed study of the Norwegian seabed under the MAREANO program. The generally low PAH levels found, an average around 200 ng g dry weight for sum PAH, indicate low inputs of petroleum hydrocarbons to the marine environment in the area. Differences in PAH composition and various PAH ratios indicate a natural, mostly petrogenic origin of PAH in sediments from the open sea locations, while the fjord locations show higher pyrogenic PAH contents with an increase towards upper sediment layers, indicating low inputs from human activities. Petrogenic PAH levels increase in deeper sediments at open sea locations, also when normalised to total organic carbon (TOC) contents, suggesting natural leakages of oil-related hydrocarbons in the area.

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