Sentences with phrase «ocean shelf waters»

While anthropogenic warming should accelerate the thawing of offshore permafrost via warming of Arctic Ocean shelf waters, this impact should be considered additive to a broader thawing trend that has been underway for thousands of years.

Not exact matches

During this time, precipitation and meltwater seeped into the exposed shelf areas and filled water tables, which were then covered up by the ocean as sea levels rose again.

They found that western Antarctica has recently seen warmer, saltier water being driven under the shelf — the part of the ice sheet that sticks out over the ocean (Science, doi.org/xkx).

«The new data set will allow us to check if our ocean models can correctly represent changes in the flow of warm water under ice shelves,» he added.

But warming ocean waters have been eating away at the underside of these ice shelves, thinning them in many places and reducing their ability to buttress the ice.

A plague of oxygen - deprived waters from the deep ocean is creeping up over the continental shelves off the Pacific Northwest and forcing marine species there to relocate or die.

«Strong El Niño events cause large changes in Antarctic ice shelves: Oscillations of water temperature in the tropical Pacific Ocean can induce rapid melting of Antarctic ice shelves.»

Still, there are definitely mechanisms by which this rift could be linked to climate change, most notably through warmer ocean waters eating away at the base of the shelf.»

After further analysis of the data, the scientists found that although a strong El Niño changes wind patterns in West Antarctica in a way that promotes flow of warm ocean waters towards the ice shelves to increase melting from below, it also increases snowfall particularly along the Amundsen Sea sector.

Glaciers deliver that ice from the inner reaches of the continent to the ocean, where massive frozen shelves float atop the water.

Warm ocean waters are carving away the undersides of Antarctica's ice shelves, which will speed their melting

Warm ocean waters, driven inland by winds, are undercutting an ice shelf that holds back a vast glacier from sliding into the ocean, researchers report November 1 in Science Advances.

Even Whole Foods has gotten onboard; in 2016 the upscale grocer added lionfish to the shelves and started promoting it as «an invasive species» in the Atlantic Ocean and Caribbean Sea, «far from its native waters.»

Meanwhile, ocean water seeps beneath the ice shelf and washes up against the base of the glacier.

The scientists also identified carbon fluxes where further research would be needed to reduce uncertainties, including the exchange of carbon between shelf waters and the open ocean.

According to the study, the west Florida shelf and the entire offshore Texas coast could be on the verge of seeing dramatically high densities of lionfish, based on ocean conditions (water flow, etc.,) which help spread the invasive species and concentrate them to new areas.

But scientists increasingly attribute much of the observed grounding line retreat — particularly in West Antarctica — to the influence of warmer ocean water seeping beneath the ice shelves and lapping against the bases of glaciers, melting the ice from the bottom up.

The study, published in the American Geophysical Union's Geophysical Research Letters, is the first to document fine - scale changes taking place on the ice shelf that help maintain its natural balance with the surrounding ocean waters.

At the edge of the Pacific continental shelf, deeper, nutrient - rich waters rise to the ocean's surface.

The glacier is currently experiencing significant acceleration, thinning and retreat that is thought to be caused by «ocean - driven» melting; an increase in warm ocean water finding its way under the ice shelf.

When that edge moves off the continental shelf into deep open ocean waters, the productivity drops off and the marine organisms that feed larger wildlife are out of reach, scientists say.

The Chinese icebreaker Xuelong has been studying multiyear sea ice in the Arctic Ocean, and the U.S. Coast Guard is sounding waters to determine the extent of the Alaskan continental shelf.

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.

The researchers find that «ocean - driven melt is an important driver of Antarctic ice shelf retreat where warm water is in contact with shelves, but in high greenhouse - gas emissions scenarios, atmospheric warming soon overtakes the ocean as the dominant driver of Antarctic ice loss.»

«When we included projected Antarctic wind shifts in a detailed global ocean model, we found water up to 4 °C warmer than current temperatures rose up to meet the base of the Antarctic ice shelves,» said lead author Dr Paul Spence from the ARC Centre of Excellence for Climate System Science (ARCCSS).

GA maps the land masses below the ocean's surface through basic geological work and seismic and bathymetric analysis (measuring water depth at various places in a body of water) to better define and legally extend Australia's continental shelf for a submission to the United Nations under the UN Convention on the Law of the Sea.

If the water remained in the channel, the water would eventually cool to a point where it was not melting much ice, but the channels allow the water to flow out to the open ocean and warmer water to flow in, again melting the ice shelf from beneath.

Warm ocean water, not warm air, is melting the Pine Island Glacier's floating ice shelf in Antarctica and may be the culprit for increased melting of other ice shelves, according to an international team of researchers.

«A lot of what we are seeing right now in the coastal regions is that warming ocean waters are melting Antarctica's glaciers and ice shelves, but this process may just be the beginning,» Shevenell said.

Its floating front edge, the Totten ice shelf, sticks out like a tongue over the water and acts as a buttress for the giant glacier, slowing its movement toward the ocean.

When the researchers compared the timing of upwelling ocean water with ice shelf changes, they found a pattern.

In the study, the researchers use an ice - ocean model created in Bremerhaven to decode the oceanographic and physical processes that could lead to an irreversible inflow of warm water under the ice shelf — a development that has already been observed in the Amundsen Sea.

About 19 months after the wind churned the ocean, cycling warm deep waters upward and sending the cold surface waters down, the Totten ice shelf was noticeably thinner and had sped up.

«Continued monitoring of shelf inputs to Arctic surface waters is therefore vital to understand how the changing climate will affect the chemistry, biology, and economic resources of the Arctic Ocean,» the study's authors wrote.

Ocean waters melting the undersides of Antarctic ice shelves, not icebergs calving into the sea, are responsible for most of the continent's ice loss, a study by UC Irvine and others has found.

If they begin to melt, however — particularly as they're exposed to warmer ocean water — the shelves become thinner and the grounding line begins to retreat backward, causing the glacier to become less stable and making the ice shelf more likely to break.

During the past 11,000 years, wind patterns have pushed warm waters from the deep ocean onto Antarctica's continental shelf

While calving is a natural process, it can be driven into overdrive by the warm ocean waters that are lapping away at the ice shelves that fringe Antarctica.

Warmer ocean waters are eating away at the base of the shelf, according to McGrath of Colorado State University.

Ice shelves (the floating front edges of glaciers that extend tens to hundreds of miles offshore) melt more because of contact with ocean water below them than they do because of sunlight.

«Where mid-depth waters from the deep ocean intrude onto the continental shelf and spread towards the coast, they bring heat that causes the glaciers to break up and melt.

The waves that run along shallow continental shelves are much larger than those over the deep ocean, and so the force applied by the standing waves is also larger in shallow water.

When ice shelves get thinner or collapse all together, glaciers speed up and dump more water into the ocean, raising sea levels.

The findings, published yesterday in the journal Nature, show that during the past 11,000 years, wind patterns have driven relatively warm waters from the deep ocean onto Antarctica's continental shelf, leading to significant and sustained ice loss.

Coastal and boundary current systems with a focus on processes that link the nearshore and continental shelf to the open ocean, such as along - and across - shore transport processes, stirring and mixing of water masses, and the coastal response to larger - scale forcing events; long - duration, high - resolution observations using autonomous underwater gliders.

The Amazon plume, the area where fresh water from the river mixes with the salty Atlantic Ocean, creates gaps in the reef distribution along the tropical shelves, making it difficult for the corals to grow.

Rather, warm water melting the ice at the ice / ocean interface is causing rapid changes, including ice - shelf collapse, and acceleration and recession of Pine Island Glacier.

During glaciation, water was taken from the oceans to form the ice at high latitudes, thus global sea level drops by about 120 meters, exposing the continental shelves and forming land - bridges between land - masses for animals to migrate.

Around the Antarctic Peninsula, changes in ocean currents, and in particular, changes in circumpolar deep water flowing onto the continental shelf, is melting ice shelves from below.

Ice shelves are important, because they play a role in the stability of the Antarctic Ice Sheet and the ice sheet's mass balance, and are important for ocean stratification and bottom water formation; this helps drive the world's thermohaline circulation.