Sentences with phrase «seafloor hydrothermal»

But a talk at the AGU Chapman Conference today by palaeoclimatologist Lowell Stott of the University of Southern California suggests a radically different reservoir: pools of liquid carbon dioxide trapped in seafloor hydrothermal vents.

The UCSB scientists are making new contributions to this field of inquiry in their studies of seafloor hydrothermal fluid discharge into the Earth's oceans, which has been occurring ever since the oceans first formed four billion years ago.

Marine geological and geophysical exploration methods, ocean ridge processes, continental margin processes, slope stability, marine mineral resources, seafloor hydrothermal systems, acoustic imaging and quantification of hydrothermal flow

Not exact matches

More amazingly, we now know that beneath the crust of Enceladus is a global ocean of liquid saltwater and organic molecules, all being heated by hydrothermal vents on the seafloor.

We found that the particles seen in our images, which were droplets of ocean only hours earlier, bore evidence of large organic molecules and compounds that indicated hydrothermal activity similar to that observed at deep - sea vents on Earth's seafloor.

In Pescadero Basin, however, hydrothermal - vent fluids pass through thick layers of seafloor mud.

While hydrothermal activity can produce considerable quantities of hydrogen, in porous rocks often found under seafloors, radiolysis could produce copious amounts as well.

If some of these larvae survive long enough to reach another hydrothermal vent, they may settle on the seafloor, grow into adults, and colonize a new vent.

The authors argue that it comes from hydrothermal activity on the ocean floor, perhaps seafloor vents like those on Earth that spew H2 and support rich microbial life.

The organisms likely survive using mechanisms similar to the ever - increasing parade of creatures that have been discovered living in the total darkness of hydrothermal vents at the bottom of the ocean, deriving energy from minerals in seafloor rocks.

The second spot was Axial Seamount, an active underwater volcano, along with its associated hydrothermal vents, where the team could study the transfer of minerals from beneath the seafloor into the water and access hardy microbes that thrive in the vent fluids, which can reach 250 degrees Fahrenheit.

In the third type of vent environment, «hydrothermal seeps,» much cooler (less than 30 - 60 degrees Celsius) water trickles out of lava flows interleaved with seafloor mud.

For more than two decades, scientists studying hydrothermal circulation in the water under the seafloor have assumed that the flow is relatively stable.

Hydrothermal vents form by an analogous method: Ion - rich hot water is expelled from the seafloor and then begins to dissolve, forming a porous shell of metal extending upward.

This is partially because oxygen, which causes the iron to precipitate, had not yet entered the ocean to great depths, and also because the seafloor at that time contained abundant iron released by bursts of hydrothermal activity.

Compared with manganese nodules, the seafloor sulfides associated with hydrothermal vents have a huge advantage: They are much easier to get to.

This research was partly based on seafloor sampling at hydrothermal vent sites using the NOC maintained robotic vehicle Isis, which was launched over the side of the RRS James Cook.

Alkaline hydrothermal vents are found on the seafloor near where tectonic plates meet.

«Hydrothermal siphon» drives water circulation through seafloor: New study explains previous observations of ocean water flowing through the seafloor from one seamount to another.»

In strip - mining a bit less than 30 acres of seafloor, Nautilus will consume hydrothermal chimneys and wipe out the clusters of snails and barnacles, crab and shrimp that are nourished by their sulfide emanations.

One question that has long and intensively been discussed in research is: Where and how deep does seawater penetrate into the seafloor to take up heat and minerals before it leaves the ocean floor at hydrothermal vents?

Scientists working off the California coast use chemical - sniffing probes, robotically driven subs, and seafloor - tethered temperature sensors to watch flows of lava pave over a once - thriving ecosystem at hydrothermal vents several kilometers below the ocean's surface.

Lost Nucleotides Although Alexander S. Bradley's article «Expanding the Limits of Life» provides a fascinating account of the discovery of microbes in a previously unknown kind of hydrothermal vent ecosystem on the seafloor, it does not substantiate his claim that the findings hint that life may have originated in an environment like the Lost City hydrothermal vent.

The bizarre habitat gleamed in the lights of an underwater robotic probe as it explored the environs of a seafloor spring spewing water at superhot temperatures — known as a hydrothermal vent.

At the other extreme, searing - hot ecosystems spring up around hydrothermal vents on seafloors.

The paper from researchers with the Cassini mission, published in the journal Science, indicates hydrogen gas, which could potentially provide a chemical energy source for life, is pouring into the subsurface ocean of Enceladus from hydrothermal activity on the seafloor.

Rich ecosystems exist on our own planet's seafloor, where volcanic rifts create hydrothermal vents.

In a field study, Diane Adams, a marine biologist at Woods Hole Oceanographic Institution in Massachusetts, and her colleagues measured the currents near the seafloor along the East Pacific Rise, a submarine ridge south - southwest of Acapulco, Mexico, that sports many hydrothermal vent systems.

The rock is an extrusion from a hydrothermal vent, not seafloor sediment.

Although the evidence was subsequently contested, some single - celled microbial life lacking a nucleus that segregates their internal DNA or RNA («prokaryotes») from the surrounding cytoplasm may have flourished in darkness within cracks in Earth's seafloor crust and around deep, warm or boiling hot ocean springs (hydrothermal or volcanic vents, such as at Lost City or at black smokers) without a need for light or free oxygen in the oceans or atmosphere.

Eventually, the hot, mineral - rich fluid rises again and gushes out of openings in the seafloor — hydrothermal vents — at temperatures up to about 400 degrees Centigrade.

This cutaway view of Saturn's moon Enceladus is an artist's rendering that depicts possible hydrothermal activity that may be taking place on and under the seafloor of the moon's subsurface ocean, based on recently published results from NASA's Cassini mission.

This Website offers information and resources for studying seafloor animals, hydrothermal vents, mid-ocean ridges, axial volcano, lava flow, and tools and technology.

Scientists at Columbia's Lamont - Doherty Earth Observatory have found evidence of hydrothermal vents on the seafloor near Antarctica, formerly a blank spot on the map for researchers wanting to learn more about seafloor formation and the bizarre life forms drawn to these extreme environments.

Scientists are in the early stages of building a fiber optic network on the seafloor for observing, in real time, deep - sea hydrothermal vents — places where super-heated water and minerals spew from Earth's crust offering clues about how life on the planet may have began.

In addition to immediate release of greenhouse gases from seafloor eruptions, the subsequent increased high and low temperature hydrothermal venting may impact the CO2 output.