http://www.onlineathens.com/stories/070710/new_666367227.shtmlSpill's extent and the effects surprising those studying it
By Lee Shearer -
[email protected]Published Wednesday, July 07, 2010
Buzz up!
Scientists knew weeks ago that much of the oil gushing from a blown-out oil well deep in the Gulf of Mexico remained below the surface, suspended in deep, cold water.
But research they are doing now has surprised them at the extent of the spill and effects on marine life, University of Georgia oceanographer Samantha Joye said Tuesday in UGA's Marine Sciences Building. Joye, one of the leading scientists tracking the spill, spoke at a weekly update on her research team's findings.
Seawater samples the team took during a June research voyage had to be diluted before analytical machines could accurately measure the oil levels in them, she said Tuesday.
Other scientists analyzing the samples still haven't told Joye the precise concentrations of oil they've found in the water. But they've seen enough to know the levels are much higher than what was found in an earlier research cruise in May, when they measured oil contamination in parts per million or parts per billion in areas close to the spill.
The more recent water samples, many taken hundreds of feet deep in the Gulf,
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Joye's earlier research on the spill has focused on methane and similar gases spewing along with the oil from the broken well a mile deep in the Gulf near the Louisiana coast. Joye's research team measured methane concentrations in some places 100,000 times normal levels.
Much of that methane remains in the deep water, and may be causing "dead zones," where fish and other marine life have a tough time breathing. As methane-eating bacteria multiply and break down the gas, they also use up oxygen in the water.
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