Sentences with phrase «as ice sheet collapse»

abrupt climate change occurring «over periods as short as decades or years,» which could be brought on by positive feedbacks triggered by such events as ice sheet collapse on a large scale, the collapse of part of the Gulf Stream, dieback of the Amazon forest, or coral reef die - off.

The longer global warming continues, the greater the risk of «waking the sleeping giants» — major feedbacks such as ice sheet collapse, methane «burps,» or ecosystem collapse — that could ignite abrupt or runaway warming beyond our control.

Not exact matches

The precariously moored West Antarctic ice sheet probably won't collapse into the ocean all in one go as the climate warms.

As climate warmed, and the ice sheet collapsed, enormous amounts of methane were abruptly released.

«Ice - cliff collapse has been debated as a theoretical process that might cause West Antarctic Ice Sheet retreat to accelerate in the future,» said co-author Dr Robert Larter, from the British Antarctic Survey.

SPEED UP The collapse of West Antarctica's glaciers may be unavoidable, and the ice sheet's demise could raise global sea level by as much as 4 meters, researchers reported.

While some may see evidence of rapid glacier thinning in the past and again today as evidence that the West Antarctic Ice Sheet is nearing a collapse driven by human - caused climate change, Steig said at this point, scientists just don't know whether that is the case.

When the planet's big ice sheets collapsed at the end of the last ice age, their melting caused global sea levels to rise as much as 100 meters in roughly 10,000 years, which is fast in geological time, Mann noted.

During the last ice age, much of North America was covered by a giant ice sheet that many scientists believe underwent several catastrophic collapses, causing huge icebergs to enter the North Atlantic — phenomena known as Heinrich events.

BANGLADESH is one of the countries at most risk from climate change, as it is low - lying and could be swamped by rising seas — particularly if they rise by several metres (see «Ice sheets on course for collapse «-RRB-.

For example, some exciting work being done by David Pollard and Rob DeConto suggests that processes such as ice - cliff collapse and ice - shelf hydrofracturing may play important roles in future ice sheet behavior that have not been well incorporated into most ice sheet models.

Many scientists concede that without drastic emissions reductions by 2020, we are on the path toward a 4C rise as early as mid-century, with catastrophic consequences, including the loss of the world's coral reefs; the disappearance of major mountain glaciers; the total loss of the Arctic summer sea - ice, most of the Greenland ice - sheet and the break - up of West Antarctica; acidification and overheating of the oceans; the collapse of the Amazon rainforest; and the loss of Arctic permafrost; to name just a few.

As more ice are removed near the ice margin, more intraplate earthquakes are induced and this positive feedback may explain the fast collapse of ice sheets.

Ice shelf collapse and glacier recession here, in front of the large ice streams such as Pine Island Glacier and Thwaites Glacier, would have potential to raise sea levels by tens of centimetres to a metre, through the process of marine ice sheet instabilityIce shelf collapse and glacier recession here, in front of the large ice streams such as Pine Island Glacier and Thwaites Glacier, would have potential to raise sea levels by tens of centimetres to a metre, through the process of marine ice sheet instabilityice streams such as Pine Island Glacier and Thwaites Glacier, would have potential to raise sea levels by tens of centimetres to a metre, through the process of marine ice sheet instabilityice sheet instability23.

Geologic shoreline evidence has been interpreted as indicating a rapid sea level rise of a few meters late in the Eemian to a peak about 9 meters above present, suggesting the possibility that a critical stability threshold was crossed that caused polar ice sheet collapse [84]--[85], although there remains debate within the research community about this specific history and interpretation.

However, in periods in the past, say around 8,200 years ago, or during the last ice age, there is lots of evidence that this circulation was greatly reduced, possibly as a function of surface freshwater forcing from large lake collapses or from the ice sheets.

Are there any studies done to model a worst case ice sheet collapse, such as WAIS collapse causing a mega tsunami?

Some headlines are completely overwrought — as with this NBC offering: «West Antarctic Ice Sheet's Collapse Triggers Sea Level Warning.»

This prediction was seized upon by global warming advocates as «proof» that the South Pole's unprecedented warming would melt sea ice and cause melting ice sheets to collapse, raising ocean levels and thus submerging worldwide coastal areas.

Since the ice sheet collapse are not demonstrated, global warming as modeled means less intense storms.

The Thwaites Glacier «drains the so - called weak underbelly of the West Antarctic Ice Sheet» (Alley et al. 2015) and this glacier was identified in 1981 as the most likely conduit for collapse of the ice sheIce Sheet» (Alley et al. 2015) and this glacier was identified in 1981 as the most likely conduit for collapse of the ice sSheet» (Alley et al. 2015) and this glacier was identified in 1981 as the most likely conduit for collapse of the ice sheice sheetsheet.

New studies released on Monday show that a large portion of the West Antarctic Ice Sheet may have begun a slow but «unstoppable» collapse, with the demise of these glaciers taking place sometime during the next few centuries to as many as 1,000 years from now.

Change arising from some sources, such as volcanic eruptions or the West Antarctic Ice Sheet collapsing, may be abrupt — but they don't flip back just as quickly, centuries later.

If Antarctica's ice sheets collapse, it would expose these hydrates, inundating them with seawater as the ocean washed over portions of the continent.

The report predicts that half of the world's identified tipping points — such as the collapse of polar ice sheets and the drying out of the Amazon rainforest — would be crossed under 2 ℃ warming, compared with 20 % of them at 1.5 ℃.

Well, you might now be wondering if that imminent, catastrophic Antarctica ice sheets melting and collapse are still imminent... as predicted.

These approaches, however, haven't taken into account some physical processes that can quickly increase ice sheet discharge, such as the collapse of terminal ice cliffs and the breakup of floating ice shelves caused by a process known as hydrofracturing.

He notes that ice sheet experts say we must consider a collapse of the Antarctic sheet as a significant probability by the end of the century.

As he frames the question: «Which is the more environmentally sensitive thing to do: let the Greenland ice sheet collapse and polar bears become extinct, or throw a little sulfate in the stratosphere?

The scamsters have settled on collapse of the West Antarctic Ice Sheet (WAIS) as the key to getting us ignorant little people to fork over their money and freedom.

They did not account for modern observations in calibrating marine ice - sheet instability, or probe rates of ice - cliff collapse as fast as the fastest currently seen in Greenland.

Scientists are also exploring the possibility that if the Greenland Ice Sheet (pictured above) collapses quickly, the infusion of fresh melt water could short - circuit the ocean's conveyor belt known as the meridional overturning circulation.

Abrupt climate changes, such as the collapse of the West Antarctic Ice Sheet, the rapid loss of the Greenland Ice Sheet or large - scale changes of ocean circulation systems, are not considered likely to occur in the 21st century, based on currently available model results.

Younger dryas could have been caused by the collapse of the north american ice sheets as the last glaciation ended but there are other theories, but what does that have to do with quantum mechanics?

Two teams of scientists say the long - feared collapse of the West Antarctic Ice Sheet has begun, kicking off what they say will be a centuries - long, «unstoppable» process that could raise sea levels by as much as 15 feet.

While the IPCC projected a maximum 23 - inch sea - level rise before 2100 as a result of rising temperatures, Gore's statement predicted a 20 - foot rise in sea levels if the Greenland or West Antarctic ice sheets were to melt or collapse at an indefinite point in the future.

«Many scientists concede that without drastic emissions reductions by 2020, we are on the path toward a 4C rise as early as mid-century, with catastrophic consequences, including the loss of the world's coral reefs; the disappearance of major mountain glaciers; the total loss of the Arctic summer sea - ice, most of the Greenland ice - sheet and the break - up of West Antarctica; acidification and overheating of the oceans; the collapse of the Amazon rainforest; and the loss of Arctic permafrost; to name just a few.

For example, the weakening of the THC under 1 degree of warming, a risk of collapse for 3 degrees, risk of irreversible melting of the Greenland Ice sheet at 2 degrees warming, sea level changes of 5 — 12 meters over several centuries, — these eventualities are debatable, and should certainly be viewed as the «adverse tail» of possible impacts.

As climate warmed, and the ice sheet collapsed, enormous amounts of methane were abruptly released.