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2014-10-27

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de

Am 27. Oktober 2014 veröffentlichte das wissenschaftliche Fachmagazin Proceedings of the National Academy of Sciences (PNAS) eine Studie, die aufzeigt, wo ein Teil des ausgetretenen Öls nach der Explosion der Ölbohrplattform Deep Water Horizon im April 2010 geblieben ist. Nach Schätzungen der US-Regierung sollen bei der Katastrophe bis zu 5 Millionen Barrels ins Meer gelangt sein. BP bestreitet die Menge und geht von geschätzten 3.26 Millionen Barrels aus. Die Ergebnisse der Studie zeigen nun auf, dass gut zwei Millionen Barrel am Meeresboden rund um das Macondo-Ölfeld abgelagert haben. Durch Analysen von über 3.000 Sedimentproben von 543 Stellen des Meeresbodens konnten die Wissenschaftler nun zuverlässige Daten über die Menge des ausgetretenen Öls erheben. Eine Fläche von 3.200 Quadratkilometern in einer Tiefe von 1.000 bis 1.300 Metern sind mit dem Öl kontaminiert.

en

Due to the environmental disaster’s unprecedented scope, assessing the damage caused by the 2010 Deepwater Horizon spill in the Gulf of Mexico has been a challenge. One unsolved puzzle is the location of 2 million barrels of submerged oil thought to be trapped in the deep ocean. Scientists from the University of California, Santa Barbara and from the Woods Hole Oceanographic Institute and University of California, Irvine have been able to describe the path the oil followed to create a footprint on the deep ocean floor. The findings appeared on 27 October 2014 in the Proceedings of the National Academy of Sciences. For this study, the scientists used data from the Natural Resource Damage Assessment process conducted by the National Oceanic and Atmospheric Administration. The United States government estimates the Macondo well’s total discharge — from the spill in April 2010 until the well was capped that July — to be 5 million barrels. By analyzing data from more than 3,000 samples collected at 534 locations over 12 expeditions, they identified a 1,250-square-mile patch of the deep sea floor upon which 2 to 16 percent of the discharged oil was deposited. The fallout of oil to the sea floor created thin deposits most intensive to the southwest of the Macondo well. The oil was most concentrated within the top half inch of the sea floor and was patchy even at the scale of a few feet.

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2016-11-21