Sentences with phrase «shallow seabed»

To answer that, we need to know what kind of rates of permafrost / shallow seabed outgassing should we expect by 2050 — and could it result in an amplification of polar amplification?

Because Japan lacks much shallow seabed in which to fix standard offshore turbines, new floating turbine technology is likely the future for offshore wind there.

Not exact matches

«When the carcass of a vertebrate reaches the Mediterranean seabed and remains at shallow depths, it is free - living bacteria that degrade its bones and decompose the organic material.

Clathrate occurs in the Antarctic and particularly in the Arctic where it is abundant in the relatively shallow though very cold seabed of the vast continental shelves which almost encircle the Arctic Ocean.

These are the areas of seabed immediately surrounding a land mass, where the sea is relatively shallow compared to the open ocean beyond it.

The water is generally calm and excellent for children since it has a very shallow, flat sandy seabed.

There seem to be layers and layers of pristine yet fragile plates of coral, bedecking the Taveuni seabed, as it slopes from a sandy floor at around 30 metres up to the shallows of 8 to 10 metres.

The concern, as I understand it, is that pathways in the latter areas can bring undissolved methane up to the seabed surface, and from there it can make it way through the shallow water column into the ocean surface.

Re # 92 The carbonate compensation depth (the depth below which calcium carbonate dissolves) is shallow in polar waters, so calcium carbonate sediments are virtually absent on the arctic seabed.

[5:19 p.m. Updated Below you can also read about new federal research concluding that strong hurricanes don't just pose a threat on the surface of the Gulf of Mexico, but could threaten some of the thousands of miles of pipelines crisscrossing parts of the seabed in relatively shallow waters.]

Fresh headlines followed publication of «Ebullition and storm - induced methane release from the East Siberian Arctic Shelf,» a new Nature Geoscience paper from Natalia Shakhova, Igor Semiletov and the rest of a team tracking emissions of this important greenhouse gas from the seabed and shallow waters off Siberia.

Dec. 29, 9:28 a.m. Updated below I've been in touch with Natalia Shakhova and Igor Semiletov, the intrepid Russian researchers, based at the International Arctic Research Center in Fairbanks, Alaska, who for more than a decade have been leading an important international project analyzing methane plumes rising from the seabed in the shallow Arctic waters spreading north from eastern Siberian shores.

Postscript: Scientists at the Naval Research Laboratory, analyzing seabed currents and mud movement after the passage of Hurricane Ivan in 2004, have concluded that the underwater turbulence from hurricanes could be severe enough to cause mudslides and possibly imperil pipelines on the seafloor in shallow regions of the Gulf of Mexico.

«An ice - free Arctic could be this year, in September,» McPherson says, «and this could lead to a burst of methane at any time» from the shallow Arctic seabed.

Unlike the Atlantic Ocean, where offshore wind farms can be bolted into the seabed in relatively shallow water, the West Coast's continental shelf plunges quickly and steeply.

Scientists estimate that there are hundreds of millions of tonnes of methane gas locked away beneath the Arctic permafrost, which extends from the mainland into the seabed of the relatively shallow sea of the East Siberian Arctic Shelf.

Clathrate occurs in the Antarctic and particularly in the Arctic where it is abundant in the relatively shallow though very cold seabed of the vast continental shelves which almost encircle the Arctic Ocean.

Because the frequency of ice scour on the shelf seabed is closely linked to sea ice duration, the catastrophic disturbance of shallow biodiversity is likely to significantly increase [16].

«Previous observations have pointed to large methane plumes being released from the seabed in the relatively shallow sea off the northern coast of Siberia, but the latest findings were made far away from land in the deep, open ocean where the surface is usually capped by ice.»

As it happens, the extra heat travels into shallow seas along the continental shelf and, over time, the warming also spreads to the deep seabed, destabilizing methane hydrates and free gas trapped over millennia in the permafrost cap.

''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian Sea, developing a 1000 - year proxy temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed, as the seven scientists describe it, that «the lowest isotope values (highest temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near - surface water temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale temperature variability of 1 to 2 °C magnitude.»

> Nice paper, but no evidence for shallow hydrates: «hydrates > are not stable at at the seabed and near sub-seabed»

The basalts on land are relatively shallow, but those at sea are covered not only by water, but hundreds or thousands of feet of sediment, and appear to extend far below the seabed.