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Παρασκευή 18 Ιουνίου 2010

OH MY GOD!!!!

Oil gushes from the bottom of the Gulf of Mexico is full of methane gas, new estimates show, intensifying concerns about the formation of a giant "dead zone" without oxygen.
Meanwhile, dolphins and sharks are unusually concentrated in shallow waters off the beaches of Florida while trying to avoid a spill. Fish and invertebrates collected off the coast of Alabama, and birds covered with oil unsteady mire in Louisiana not to occur again.

    
This is the biggest release of methane in modern history
Many animals seem unable to escape from the disaster site, but their future is uncertain: the shallow water where collected do not provide enough food, and scientists worry that will come later to die en masse. The decomposition by aerobic bacteria could exhaust the oxygen and water stagnation.
Methane
The same effect could be methane wells in large quantities along with oil. A gigantic bubble of methane are believed also to have caused the sinking of the platform DeepWater Horizon on April 21.
New research at the University of Texas A & M finds now that the oil contains 40% methane, compared with 5% in most oil fields.
"This is the biggest release of methane in modern history," said Jon Kessler, head of the study.
Methane is an invisible, odorless and flammable gas is a key component of natural gas. Often the excess methane is burned next to oil. So does the BP oil collected from the Gulf.
Methane and oil are decomposed by microbes that live in the ocean and using oxygen to digest the hydrocarbons.
As microbes are increasing due to the influx of oil, the dissolved oxygen in the sea would be exhausted. This will lead to two problems: The natural decomposition of the oil will stop and generate large anoxic zones.
So far, however, the record of dead animals in the Gulf region seems low compared with other similar events: 738 birds, 353 mammals and 41 turtle-numbers pale compared with the 250,000 birds and otters killed in 2800 by a very less than the Exxon Valdez spill in Alaska in 1989.
But the situation in the Gulf of Mexico is worse than it seems: According to Greenpeace and the American Fish and Wildlife, the more dead animals were not identified because they lost the mire, drifting in the ocean or sink to the bottom.

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