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Phase distribution of hydrocarbons in the water column after a pelagic deep ocean oil spill
Authors:Saioa Elordui-Zapatarietxe  Núria Moraleda  Joan Albaigés
Institution:a Institute of Environmental Science and Technology, Universitat Autònoma de Barcelona, Bellaterra 08193, Catalonia, Spain
b College of Oceanic and Atmospheric Sciences, Oregon State University, Corvallis, Oregon, United States
c ICREA, Passeig Lluís Companys, 23, Barcelona 08010, Catalonia, Spain
d Marine Environment Laboratories, International Atomic Energy Agency, 4 quai Antoine 1er, MC 98000, Monaco
e Institute of Environmental Assessment and Water Research, CSIC, Jordi Girona 18, Barcelona 08034, Catalonia, Spain
Abstract:Spills from wrecks are a potential major source of pollution in the deep ocean. However, not much is known about the fate of a spill at several kilometers depth, beyond the oceans continental shelves. Here, we report the phase distribution of hydrocarbons released from the wrecks of the Prestige tanker, several years after it sank in November 2002 to depths between 3500 and 3800 m. The released oil reached the surface waters above the wrecks without any signs of weathering and leaving an homogenous signature throughout the water column. At depths of several kilometers below the sea surface, the occurrence and spread of the deep sea oil spill could be evaluated better by quantifying and characterizing the dissolved hydrocarbon signature, rather than just the investigation of hydrocarbons in the suspended particulate matter.
Keywords:Prestige  Northeastern Atlantic  Deep sea oil spill  PAHs  Dissolved phase  Hydrocarbons
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