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| Titel |
Occurrence, sources and transport pathways of natural and anthropogenic hydrocarbons in deep-sea sediments of the eastern Mediterranean Sea |
| VerfasserIn |
C. Parinos, A. Gogou, I. Bouloubassi, R. Pedrosa-Pàmies, I. Hatzianestis, A. Sanchez-Vidal, G. Rousakis, D. Velaoras, G. Krokos, V. Lykousis |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1726-4170
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| Digitales Dokument |
URL |
| Erschienen |
In: Biogeosciences ; 10, no. 9 ; Nr. 10, no. 9 (2013-09-24), S.6069-6089 |
| Datensatznummer |
250085336
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| Publikation (Nr.) |
 copernicus.org/bg-10-6069-2013.pdf |
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| Zusammenfassung |
| Surface sediments collected from deep basins (1018–4087 m depth) of the
eastern Mediterranean Sea (Ionian Sea, southern Aegean Sea and northwestern
Levantine Sea) were analyzed for aliphatic and polycyclic aromatic
hydrocarbons as tracers of natural and anthropogenic inputs. Concentrations
of total aliphatic hydrocarbons, n-alkanes and the unresolved complex mixture
(UCM) of aliphatic hydrocarbons varied significantly, ranging from 1.34 to
49.2 μg g−1, 145 to 4810 ng g−1 and 0.73 to
36.7 μg g−1,
respectively, while concentrations of total polycyclic aromatic
hydrocarbons (PAHs) ranged between 11.6 and 223 ng g−1. Molecular
profiles of determined hydrocarbons reflect a mixed contribution from both
natural and anthropogenic sources in deep-sea sediments of the eastern
Mediterranean Sea, i.e., terrestrial plant waxes, degraded petroleum
products, unburned fossil fuels and combustion of grass, wood and coal.
Hydrocarbon mixtures display significant variability amongst sub-regions,
reflecting differences in the relative importance of inputs from various
sources and phase associations/transport pathways of individual hydrocarbons
that impact on their overall distribution and fate. Hydrocarbon
concentrations correlated significantly with the organic carbon content of
sediments, indicating that the latter exerts an important control on their
transport and ultimate accumulation in deep basins. Additionally, water
masses' circulation characteristics also seem to influence the regional
features and distribution patterns of hydrocarbons. Our findings highlight
the role of deep basins/canyons as repositories of both natural and
anthropogenic chemical species. |
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