Spill Is Biggest Accidental Oil Release, New U.S. Data Show. By Campbell Robertson and Clifford Krauss, NYTimes, August 3, 2010. "The BP spill is by far the world's largest accidental release of oil into marine waters, according to the most precise estimates yet of the well's flow rate, announced by federal scientists on Monday. Nearly five million barrels of oil have gushed from BP's well since the Deepwater Horizon rig exploded on April 20, according to the latest data. That amount outstrips the estimated 3.3 million barrels spilled into the Bay of Campeche by the Mexican rig Ixtoc I in 1979, previously believed to be the world's largest accidental release... 'We've never had a spill of this magnitude in the deep ocean,' said Ian R. MacDonald, a professor of oceanography at Florida State University. 'These things reverberate through the ecosystem,' he said. 'It is an ecological echo chamber, and I think we'll be hearing the echoes of this, ecologically, for the rest of my life.'...
"Federal science and engineering teams, citing data that are 'the most accurate to date,' estimated that 53,000 barrels of oil a day were pouring from the well just before BP was able to cap it on July 15. They also estimated that the daily flow rate had diminished over time, starting at about 62,000 barrels a day and decreasing as the reservoir of hydrocarbons feeding the gusher was gradually depleted. Before Monday's announcement, federal scientific teams had estimated the spill in a range from 35,000 to 60,000 barrels a day. The teams believe that the current estimates are accurate to within 10%. They also reported that of the roughly 4.9 million barrels that had been released from the well, about 800,000 had been captured by BP's containment efforts. That leaves over four million barrels that gushed into the Gulf of Mexico from April 20 to July 15."
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