Characterization of subsurface polycyclic aromatic hydrocarbons at the Deepwater Horizon site
Here, we report the initial observations of distributions of polycyclic aromatic hydrocarbons (PAH) in subsurface waters near the Deepwater Horizon oil well site (also referred to as the Macondo, Mississippi Canyon Block 252 or MC252 well). Profiles of in situ fluorescence and beam attenuation condu...
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| Veröffentlicht in: | Geophysical research letters 2010-10, Vol.37 (20), p.n/a |
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| creator | Diercks, Arne-R. Highsmith, Raymond C. Asper, Vernon L. Joung, DongJoo Zhou, Zhengzhen Guo, Laodong Shiller, Alan M. Joye, Samantha B. Teske, Andreas P. Guinasso, Norman Wade, Terry L. Lohrenz, Steven E. |
| description | Here, we report the initial observations of distributions of polycyclic aromatic hydrocarbons (PAH) in subsurface waters near the Deepwater Horizon oil well site (also referred to as the Macondo, Mississippi Canyon Block 252 or MC252 well). Profiles of in situ fluorescence and beam attenuation conducted during 9‐16 May 2010 were characterized by distinct peaks at depths greater than 1000 m, with highest intensities close to the wellhead and decreasing intensities with increasing distance from the wellhead. Gas chromatography/mass spectrometry (GC/MS) analyses of water samples coinciding with the deep fluorescence and beam attenuation anomalies confirmed the presence of polycyclic aromatic hydrocarbons (PAH) at concentrations reaching 189 μg L−1 (ppb). Subsurface exposure to PAH at levels considered to be toxic to marine organisms would have occurred in discrete depth layers between 1000 and 1400 m in the region southwest of the wellhead site and extending at least as far as 13 km. |
| doi_str_mv | 10.1029/2010GL045046 |
| format | Article |
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Res. Lett</addtitle><description>Here, we report the initial observations of distributions of polycyclic aromatic hydrocarbons (PAH) in subsurface waters near the Deepwater Horizon oil well site (also referred to as the Macondo, Mississippi Canyon Block 252 or MC252 well). Profiles of in situ fluorescence and beam attenuation conducted during 9‐16 May 2010 were characterized by distinct peaks at depths greater than 1000 m, with highest intensities close to the wellhead and decreasing intensities with increasing distance from the wellhead. Gas chromatography/mass spectrometry (GC/MS) analyses of water samples coinciding with the deep fluorescence and beam attenuation anomalies confirmed the presence of polycyclic aromatic hydrocarbons (PAH) at concentrations reaching 189 μg L−1 (ppb). Subsurface exposure to PAH at levels considered to be toxic to marine organisms would have occurred in discrete depth layers between 1000 and 1400 m in the region southwest of the wellhead site and extending at least as far as 13 km.</description><subject>Attenuation</subject><subject>beam attenuation</subject><subject>Beams (structural)</subject><subject>Canyons</subject><subject>CDOM fluorescence</subject><subject>Deepwater Horizon</subject><subject>Earth sciences</subject><subject>Earth, ocean, space</subject><subject>Exact sciences and technology</subject><subject>Fluorescence</subject><subject>Gas chromatography</subject><subject>Geobiology</subject><subject>Geophysics</subject><subject>Horizon</subject><subject>Marine organisms</subject><subject>Marine pollution</subject><subject>Mass spectrometry</subject><subject>Oceanography</subject><subject>oil spill</subject><subject>Polyallylamine hydrochloride</subject><subject>Polycyclic aromatic hydrocarbons</subject><subject>Water 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Subsurface exposure to PAH at levels considered to be toxic to marine organisms would have occurred in discrete depth layers between 1000 and 1400 m in the region southwest of the wellhead site and extending at least as far as 13 km.</abstract><cop>Washington, DC</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2010GL045046</doi><tpages>6</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Attenuation beam attenuation Beams (structural) Canyons CDOM fluorescence Deepwater Horizon Earth sciences Earth, ocean, space Exact sciences and technology Fluorescence Gas chromatography Geobiology Geophysics Horizon Marine organisms Marine pollution Mass spectrometry Oceanography oil spill Polyallylamine hydrochloride Polycyclic aromatic hydrocarbons Water analysis Water sampling Wellheads |
| title | Characterization of subsurface polycyclic aromatic hydrocarbons at the Deepwater Horizon site |
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