Weathering of field-collected floating and stranded Macondo oils during and shortly after the Deepwater Horizon oil spill
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Weathering of field-collected floating and stranded Macondo oils during and shortly after the Deepwater Horizon oil spill

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  • Journal Title:
    Marine Pollution Bulletin
  • Personal Author:
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  • Description:
    Chemical analysis of large populations of floating (n = 62) and stranded (n = 1174) Macondo oils collected from the northern Gulf of Mexico sea surface and shorelines during or within seven weeks of the end of the Deepwater Horizon oil spill demonstrates the range, rates, and processes affecting surface oil weathering. Oil collected immediately upon reaching the sea surface had already lost most mass below n-C-8 from dissolution of soluble aliphatics, monoaromatics, and naphthalenes during the oil's ascent with further reductions extending up to n-C-13 due to the onset of evaporation. With additional time, weathering of the floating and stranded oils advanced with total PAH (TPAH(50)) depletions averaging 69 +/- 23% for floating oils and 94 +/- 3% for stranded oils caused by the combined effects of evaporation, dissolution, and photo-oxidation, the latter of which also reduced triaromatic steroid biomarkers. Biodegradation was not evident among the coalesced floating oils studied, but had commenced in some stranded oils. (C) 2016 Elsevier Ltd. All rights reserved.
  • Source:
    Marine Pollution Bulletin, 105(1), 7-22.
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  • Document Type:
    Journal Article
  • Rights Information:
    Accepted Manuscript
  • Rights Statement:
    The NOAA IR provides access to this content under the authority of the government's retained license to distribute publications and data resulting from federal funding. While users may legally access this content, the copyright owners retain rights that govern the reproduction, redistribution, and re-use of this work. The user is solely responsible for complying with applicable copyright law.
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    Submitted
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