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Researchers have discovered a huge “bag” of gas trapped in underwater that could be a huge, untapped natural resources and is a potential “ticking time bomb” of a, the emission of greenhouse gases.
The problem with this? Scientists don’t know what it is just yet.
The study, which was published in the journal Geophysical Research Letters, shows that there is a discovery at the bottom of the Okinawa Trough, off Japan, and perhaps as many as 100 million tonnes, or methane, which can be used as a potential source of energy, carbon dioxide, which LiveScience describes as “a ticking time bomb.” It can also be a combination of the two, according to LiveScience.
Researchers at the Kyushu University, a major gas reservoir, the bottom of a shaft more, based on an automatic method for the derivation of the dynamic pressure wave velocity from seismic reflection data. The reservoir can be seen in the two-dimensional seismic velocity mapping, which extends to a depth of about 3.5 km below the sea level, and at a distance of approximately 6.5 miles, as a dark-blue zone of low velocity in the open spaces of the high speed. (Credit: Takeshi Tsuji, Kyushu University)
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“While a lot of people are focusing on the greenhouse gas emissions from human activity are a wide variety of resources are available,” study co-author, Takeshi Tsuji, said in a statement. “Large-scale gas reservoirs, along with a more as another source of greenhouse gas emissions, we need to have to keep our eyes on. Or, they could be a valuable resource.”
In an interview with LiveScience, Tsuji said, as if the unknown gas was carbon dioxide, and he estimated it to be 50-million-ton [about 45 million tons] – it would be on a “similar order to the annual CO2 emissions of all passenger cars in Japan (about 100 million tons [907 million metric tons] per year).”
For the generation of seismic waves, in an attempt to determine how much natural gas is stored in an area of the atlantic ocean, and the researchers are sailing into the middle of the tank, and then used an air gun to make the waves.
“Seismic pressure waves in general travel more slowly through gases than through solids,” study co-author, Andri Hendriyana, will be added to the list. So, in the estimation of the velocity of seismic pressure waves through the earth, we can identify underground reservoirs, and even get information on how saturated they are. In this case, we found that a low-velocity pockets along the rifting axis is in the vicinity of the Iheya North Knoll in the mid Okinawa Trough, with an indication of the areas which have been filled up with gas.”
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In turn, the researchers discovered that as the velocity of the wave is slowed down in some areas, this has meant that the presence of the gas in the bag.
But as far as the gas pocket has been created, it is of great interest, in view of the fact that it has a significant impact on climate change, on the assumption that it is carbon dioxide.
Tsuji added that it is likely to be more areas like this in existence, so further research is needed.
“Areas such as we have seen, are not uncommon along the gorge, so I would expect that such reservoirs exist elsewhere in the Okinawa Trough, as well as the other sediment-covered continental back-arc basins around the world,” he said.
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