Sentences with phrase «sea sediments about»
Lutz and Falkowski cite one study where unique chemical compounds isolated from an actinomycete strain inhabiting deep - sea sediments about 3.3 kilometers down in the South China Sea have shown potent activities against three cancerous tumor cell lines and also showed antibacterial activities.
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Inadequate flood protection infrastructure, which right now might not contain high tides in El Nino years; Lack of action on annual sediment removal from spring freshets, which each year move over 30 million m3 of sediment and leave about 3 million m3 of silt in the navigation and secondary channels of the lower reaches; and, By the end of this century sea levels at the mouth of the river could potentially rise more than one meter due to climate change overtopping the diking system.
The sediments contain extremely rich information about the climate over millions of years — including sea surface temperature.
After a portion of cliff was washed away by the sea, the team found ancient hominid footprints within the hardened clay that had been buried beneath, dating back about 900,000 years based on the vegetation preserved in the clay's sediments.
That fits with analysis of sea - floor sediments, which suggests that a dead zone of around 600 square kilometres formed here about 40,000 years ago.
Real - world data back the claim: Accumulations of calcium carbonate in deep - sea Pacific sediments show that the Pliocene ocean experienced huge shifts at the time, with waters churning all the way from the surface down to about three kilometers deep, as would be expected from a conveyor belt — type circulation.
To study the movement of vent products, the researchers set up sediment traps and current meters near the hydrothermal vents along the East Pacific Rise, an ocean ridge located about 800 kilometers off the southern coast of Mexico and a mile and a half below sea level.
Microbes such as bacteria are the most numerous organisms on Earth, and about 90 % of them live in sediments buried under the sea floor.
This picture may be about to change in light of a study of deep - sea rocks and sediments led by John Parkes, a microbiologist at Cardiff University in the U.K.. By visiting oil - drilling projects at two sites in the Pacific in 2002, Parkes and colleagues obtained samples as deep as 400 meters beneath the seafloor.
From their trawlers scraping the floors of the seas to their dams impounding sediment by the gigatonne, from their stripping of forests to their irrigation of farms, from their mile - deep mines to their melting of glaciers, humans were bringing about an age of planetary change.
A clear drop in the carbonate content of deep - sea sediments directly points towards ocean acidification as a side effect, a perturbation to the carbon cycle that lasted about 170,000 years.
The findings, presented here Wednesday (Dec. 5) at the annual meeting of the American Geophysical Union, are the result of analyzing sediments drilled from the Dead Sea that captured about 200,000 years of the salty body's history.
They analyzed marine sediment cores drilled off shore near East Antarctica and about 2.9 kilometers (1.8 miles) below sea level.
Besides the information about greenhouse - gas levels from the trapped air bubbles at Vostok, a sediment core from the bottom of the Red Sea indicates changes in sea level, which in turn give an approximation of ice sheet arSea indicates changes in sea level, which in turn give an approximation of ice sheet arsea level, which in turn give an approximation of ice sheet area.