Sentences with phrase «massive ice sheets»

Here the land is sinking as the continent adjusts to the removal of massive ice sheets, but it appears the sea is rising.

One major influence is the slow rebound of crust that was weighed down by massive ice sheets during the last ice age that have since melted away.

This is where land which was formerly pressed down by massive ice sheets, rebounds now that the ice sheets are gone.

Last summer, James Hansen — the pioneer of modern climate science — pieced together a research - based revelation: a little - known feedback cycle between the oceans and massive ice sheets in Antarctica and Greenland might have already jump - started an exponential surge of sea levels.

The sediment cores used in this study cover a period when the planet went through many climate cycles driven by variations in Earth's orbit, from extreme glacial periods such as the Last Glacial Maximum about 20,000 years ago, when massive ice sheets covered the northern parts of Europe and North America, to relatively warm interglacial periods with climates more like today's.

As massive ice sheets retreated during past ice ages, their weight on the land below lifted and the land rebounded.

Clues in seafloor sediments reveal that relatively warm water beneath western Antarctic ice shelves, a major factor in today's massive ice sheet retreat, also fueled some past ice loss.

Early studies by geologists and glaciologists attempted to find a climate mechanism to explain the evidence of massive ice sheets during the recent Ice Age.

Massive ice sheets grew across the Antarctic continent, major animal groups shifted, and ocean temperatures decreased by as much as 5 degrees.

Greenland and Antarctica's massive ice sheets exert a strong gravitational pull on the waters around them, but as they melt, the attraction weakens, causing nearby sea levels to fall.

Antarctica's massive ice sheet acts as a global heat sink.

How soon humanity will have to move inland to escape rising seas depends in great part on how quickly West Antarctica's massive ice sheet shrinks.

However, it's quite a different matter melting a long - lived massive ice sheet up to 1.5 km thick that covers over 70 % of the land surface (as happened at the end of the last glacial period), from melting isolated and much thinner ice caps / sheets that only cover about 11 % of the land surface (i.e. present - day).»

After a cool spring kept Greenland's massive ice sheet mostly solid, a (comparatively) warm late June and early July have turned half the ice sheet's surface into liquid, well outside the range of normal for this time of year.

During the past decade, Antarctica's massive ice sheet lost twice the amount of ice in its western portion compared with what it accumulated in the east, according to Princeton University researchers.

All ice types, including massive ice sheets, mountain glaciers and Arctic sea ice (frozen sea - surface), are for the most part melting far faster than predicted three years ago.

They also explain how the «sea ice extent around Antarctica» is very different from the sea ice in the Arctic because the Arctic is not covered by land, but by ocean, albeit mostly frozen most of the time, whereas Antarctica is a vast continent covered by massive ice sheets with the South Pole at its center.

Some of the recent modelling would say that if you can limit warming to 1.5 C, or ultimately lower, you're going to be able to limit and reduce or even prevent massive ice sheet disintegration.

Glaciers can be found on every continent on Earth, but only three massive ice sheets exist in the world today: the Greenland ice sheet, the West Antarctic ice sheet, and the East Antarctic ice sheet.

Greenland's massive ice sheet contains enough ice to raise global sea level by about 20 feet.

(Longer - term forecasts depend on how rapidly Antarctica's own massive ice sheets deteriorate.)

Sea level rise, ocean acidification and the rapid melting of massive ice sheets are among the significantly increased effects of human - induced global warming assessed in the survey, which also examines the emissions of heat - trapping gases that are causing the climate change.

Massive ice sheets cover much of your Arctic world.

The long lag time has always puzzled scientists: Why did Antarctica become covered by massive ice sheets 34 million years ago, while the Arctic Ocean acquired its ice cap only about 3 million year ago?

One massive ice sheet, more than 3 kilometres thick in places, grew in fits and starts until it covered almost all of Canada and stretched down as far as Manhattan.

Several recent studies, most based on satellite data, have concluded that warming has accelerated ice loss from Greenland's massive ice sheet.

The deep grooves under the massive ice sheet could facilitate flow into the ocean, which suggests sea level rise estimates for this century need to be revised upwards

Parts of the massive ice sheet once considered stable have been shown to be melting in new research

Either those people had no dogs, or they and their furry companions stayed on the land bridge, possibly blocked by two massive ice sheets, until rapidly moving inland around 10,000 years ago (SN: 2/16/08, p. 102), Perri said.

Greenland's massive ice sheet has melted at a record - setting pace this year — and summer isn't over yet

Melting of glaciers and the massive ice sheets of Greenland and Antarctica will combine for a rise in sea levels of 25 meters, or about 80 feet.

The findings, to be published in the June 14 issue of Science, will help scientists improve projections of how Antarctica, which holds about 60 percent of the planet's fresh water locked in its massive ice sheet, will respond to a warming ocean and contribute to sea level rise.

Massive ice sheets are destabilized.

Many older models of Greenland assumed that its massive ice sheet sat on bedrock that was relatively flat, even though scientists did not know the full thickness of the ice.

Some 450,000 years ago, a massive ice sheet spanned Scandinavia, reaching down into northern Europe and much of what are today the British Isles.

Ice loss from the massive ice sheets covering Greenland and Antarctica is accelerating, according to a new study.

Using 50 million laser readings from a NASA satellite, scientists for the first time calculated changes in the height of the vulnerable but massive ice sheets and found them especially worse at their edges.

Today the only place we have massive ice sheets is in the East Antarctic and to a lesser extent the West Antarctic, but now the world is twice as hot.

The long - term stability of the massive ice sheets of Antarctica, which have the potential to raise sea levels by hundreds of meters, has been called into question with the discovery of fast - moving rivers of water sliding beneath their base.

Of the last great meltwater effects between 10,000 and 20,000 years ago there was massive sea level rises (5 meters per century) because there was massive ice sheets that stretched out to its continental shelf, before breaking off and scarring the edge of the shelf itself.

It appears the earth's climate is unstable when it cools a few degrees, as that starts the formation of the massive ice sheets in the Northern Hemisphere.

That connection, between short term factors like El Niño and long term, large scale change in West Antarctica is especially important if we want to predict how this massive ice sheet will respond to human - driven warming.

The ice shelves themselves are already floating, but they are attached to land and play a critical role in slowing the ocean - bound ice flow from the massive ice sheets behind them.

GRACE - FO and ICESat - 2 will use radically different techniques to observe how the massive ice sheets of Greenland and Antarctica are changing over time and how much they are contributing to sea level rise.

Scientists just uncovered eight, massive ice sheets on Mars hidden below the surface.

Of the last great meltwater effects between 10,000 and 20,000 years ago there was massive sea level rises (5 meters per century) because there was massive ice sheets that stretched out to its continental shelf, before breaking off and scarring the edge of the shelf itself.

Today the only place we have massive ice sheets is in the East Antarctic and to a lesser extent the West Antarctic, but now the world is twice as hot.