Sentences with phrase «shallow shelf of»

Most beaches have a long, shallow shelf of sand leading into the water.

Permafrost, including the sub-sea permafrost on the shallow shelves of the Arctic Ocean, contains old organic carbon deposits.

Not exact matches

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In a shallow part of the sea floor underneath the ice shelf, a bedrock protrusion, named the Bawden Ice Rise, has served as an anchor point for the floating shelf for many decades.

A throng of reef - dwelling organisms live on the edge of the Gulf of Mexico's continental shelf some 200 kilometers offshore, from corals in the shallower regions to sponges, sea fans and other soft corals, and numerous fish species in the deep.

Previous work has estimated that more than a trillion tonnes of methane lie under the shelf, trapped inside lattices of ice known as hydrates, at depths as shallow as 20 metres.

This is not only because harvesting from relatively shallow waters is easier than in the open ocean, but also because fish are much more abundant near the coastal shelf, due to coastal upwelling and the abundance of nutrients available there.

Earlier this year an analysis of mitochondrial DNA conducted by researchers in the United States, Japan, and Taiwan estimated that the first anglerfish appeared about 160 million years ago, during the Jurassic Period, and quickly diversified as they spread into habitats ranging from shallow waters to the continental shelves to the harsh deeps.

In the shallowest part of the survey area closest to the southern side of island, the seafloor levels out into a nearly flat shelf, which is likely important in explaining the pattern of redistribution for the eroded material, Ferrini said.

Most of the shelf is too shallow for methane hydrates, Thornton says.

This, says Webb, correlates nicely with Romanowicz's observation that, of all the areas she looked at in the Pacific, the Earth's hum matched up best with waves near the Vancouver coastline, off Canada, where the shelf is shallow and the ocean waves can be enormous.

At issue is whether the shallow ocean shelf that makes up the seafloor, originally composed of submerged permafrost, is now a significant source of emissions of methane, a potent greenhouse gas.

Their effect was only to expand the world's calcium carbonate sinks from the shallow continental shelves to some of the deeper ocean (Westbroek 1991).»

The only place where melting methane hydrates appear to be releasing methane to the atmosphere is on the Siberian margin, where hydrates associated with the permafrost relict from the last glaciation release methane to the shallow water column of the shelf waters.

This increased the area of continental shelf, produced shallow seas, thereby also expanding the diversity of environmental niches in which animals could specialize and speciate.

There was a warm, stable climate with dispersed continents surounded by vast warm and shallow seas over continental shelves that provided light, oxygen, and nutrients for life to thrive in, because intense mountain - building also increased erosion and the discharge of eroded nutrients into those seas.

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.

This study compares aragonite saturation states in open pelagic waters, shallow shelf waters, and ice - bound high - latitude waters to delineate rates of change and causes of variation in carbonate mineral saturation states.

These characters are drawn shallow, while most of the plotting gets shelved for prolonged periods during each film, making way for the special effects and silly scenes of young tomfoolery to take center stage intermittently.

Managers leading the reform warned that the state must resist the easy distraction of «something shiny, shallow, and off the shelf.»

The trunk is pretty shallow with the seats up, but the hidden shelf below the load floor is clever, and there is loads of space if the seats are folded.

At one of the inspections the inspector did not get on the roof (it was a shallow pitch), did not enter or even look in the attic because 2 shelves were in the way, and did not enter the crawl space (was fully accessible).

We have more than 60 dive sites on the regular Small Hope Bay Lodge dive schedule, including colorful shallow reefs, coral gardens, wreck dives, breathtaking blue holes and stunning wall dives at the edge of the continental shelf, where the Tongue of the Ocean plunges to 6,000 feet.

Prefer to feed in coastal bays and estuaries, as well as in the shallow water along the continental shelves of the Atlantic, Pacific and Indian Oceans.

The eastern North Pacific stock of gray whales prefers shallow, coastal waters and feeds over oceanic continental shelves around the northern Bering and southern Chukchi seas between Alaska and Russia during the summer.

The main feeding habitat of the western Pacific subpopulation is the shallow (5 — 15 m (16 — 49 ft) depth) shelf off northeastern Sakhalin Island, particularly off the southern portion of Piltun Lagoon, where the main prey species appear to be amphipods and isopods.

The rock in the middle of the bay has very steep drop offs to the south and west and an amazing shelf in the north that is carpeted with wrinkled soft corals in the shallows.

The coral reefs contained within the atoll's lagoon shelter a remarkable 200 species of fish in a magical setting of shallow reefs, ledges, shelves and drop offs.

Water levels in the lagoons are very shallow with crystal clear water before sloping down to shelves at a depth of around 60 feet.

Bohol diving has a fantastic mix of dive sites, from pretty shallow shelving reefs with macro, to 30m walls to keep even the most advanced diver interested.

Little ones will enjoy the sheltered horseshoe shaped beach which shelves gently into the shallow, calm waters of the sea.

One cupboard has built - in drawers finished with blackboard paint so Mill can leave laundry instructions for the maid; sliding drawer lids are for folding shirts on; very shallow shelves behind the cupboard door neatly hold Mill's vast collection of eyewear.

Oldenburg takes trivial things — buttons, bus tickets, book matches — out of shallow boxes stacked in the customised shelves which make up an entire studio wall.

The only place where melting methane hydrates appear to be releasing methane to the atmosphere is on the Siberian margin, where hydrates associated with the permafrost relict from the last glaciation release methane to the shallow water column of the shelf waters.

The shelf (ESAS) is also characterized by the location of over 80 % of the existing submarine permafrost, as well as of the bulk of shallow water gas hydrates.

Under this scenario, most of the clathrate deposits in the arctic (both tundra and shallow continental shelf deposits) could be released into the atmosphere in a fairly short period of time (less than a century), implying a rate of outgassing that makes 100 times present estimated levels a vast underforecast.

And because surface productivity more rapidly reaches the floor of those shallow shelves, bottom dwelling organisms collectively called the «benthos,» receive over 70 % of the energy sequestered at the surface.

A cupboard with shallow shelves that includes more racks on the inside of the door means everything is easier to see and get too, saving you some frustrating digging.

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.

The West Coast continental shelf's sharp drop off to great depths makes the fixed foundations used in the shallow waters of the wide East Coast shelf impractical.

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].

Their scientific cruises on the shallow continental shelf occurred as sea ice in the Arctic Ocean was rapidly melting and as northern Siberia was earning the distinction — along with the North American Arctic and the western Antarctic Peninsula — of warming faster than any place on Earth.

Now come fears of a methane time bomb, part two, this one bursting from the sea floor of the shallow Arctic continental shelf.

Seventy - five percent (75 %) of the sea over the shelf is shallow water, less than 50 metres deep, and consequently more immediately exposed to warming trends.

There is also a wide, shallow continental shelf that makes construction of wind farms far out to sea, beyond the sight of significant opposition, relatively less difficult and costly.

Fourth, the uniform and shallow depth of the northwest shelf offers few technical complexities to construction and operation of an oceanic pipeline network.

When hydrates are present below permafrost, on land and beneath shallow marine shelves, they are also thermally buffered by the latent heat energy needed to melt the permafrost and it could take thousands of years to destabilize the gas hydrates (Taylor et al 2005).

Researchers at the University of California at San Diego will design, build, and test an electromagnetic (EM) system designed for very shallow water use and will apply the system to determine the extent of offshore permafrost on the US Beaufort inner shelf.

Coral reefs - Rock - like limestone (calcium carbonate) structures built by corals along ocean coasts (fringing reefs) or on top of shallow, submerged banks or shelves (barrier reefs, atolls), most conspicuous in tropical and sub-tropical oceans.

Research published last spring in Nature Climate Change made a convincing case that that trek is now engaged in a 40 km retreat, a movement that will only continue to accelerate as warm water laps at the shallow leading edge of the glacier and as the glacier very slowly increases its angle of descent off of the continent's land shelf.