Sentences with phrase «sea ice levels as»

But this year, a big spring meltdown in October and November suddenly reversed that trend and has led to continued record low sea ice levels as the summer melt season progressed.

Sea ice levels as low as current ones would have stunned scientists even a decade ago.

But this year, a big spring meltdown in October and November suddenly reversed that trend and has led to continued record low sea ice levels as the summer melt season progressed.

Not exact matches

And in many, many cases — such as with ocean temperatures, rising sea levels, or ice shelf traveling speeds — scientists have recorded the data for decades, systematically, consistently, and with precision.

The warming temperatures have caused ice caps to melt, and sea levels to rise, scientific agencies such as the National Oceanic and Atmospheric Administration say.

The second cause of sea level increase is the melting of land ice — such as glaciers and ice sheets.

One is changed environmental conditions for a discrete subpopulation of the original population, such as when ice ages cause dramatic changes in sea levels, cutting species into subgroups.

If one part of an ice shelf starts to thin, it can trigger rapid ice losses in other regions as much as 900 kilometres away — contributing to sea level rise

The sea level around a melting ice cap will fall even as distant shores are inundated

The first of these pathways, marine ice sheet instability, has been studied for decades, but the second, marine ice cliff instability, has only recently been considered as an important contributor to future sea level change.

As glaciologist Richard Alley of Pennsylvania State University notes: «The ice sheet is losing mass, this loss has increased over time, [and] it is not the dominant term in sea - level rise — but it matters.»

As it melts, sea levels around it will fall, say Natalya Gomez and Jerry Mitrovica of Harvard University and colleagues: with the mass of ice shrinking, its gravitational pull on the seawater will be weaker.

Alaskan and the Canadian Arctic land - based glacier melt ranks with that of the Greenland Ice Sheet as important contributors to global sea - level rise that is already underway.

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.

The geologic record shows that the differences in ice cover, sea level and precipitation as well as in plant and animal populations were quite dramatic between the ice ages and the warm interglacials.

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.

The slipperiness helps determine how quickly the ice sheet will slide into the sea as the climate warms — and thus how quickly sea levels will rise.

New understanding of how big ice sheets on Greenland and Antarctica might break up has forced the IPCC to almost double its estimates of likely sea level rise by the end of the century — to as much as 1 metre.

Within a few hundred years sea levels in some places had risen by as much as 10 meters — more than if the ice sheet that still covers Greenland were to melt today.

But as long as greenhouse gases continue to build up in the atmosphere unabated, the scales are heavily weighted toward more record heat, ever lower sea ice levels and ever higher seas.

Glaciers around the world are melting and contributing to sea level rise, but scientists still don't quite understand how exactly glaciers give birth to icebergs as they flow into the ocean and lose ice.

All told, if the eastern and western Antarctic ice shelves were to melt completely, they would raise sea levels by as much as 230 feet (70 meters); the collapse of smaller shelves like Larsen B has sped up the flow of glaciers behind them into the sea, contributing to the creeping up of high tide levels around the world.

Your feature on uneven global distribution of sea level rise as ice sheets melt highlights a double whammy for northern...

The material on Amazon forest dieback was in the IPCC assessment as were the numbers on recent sea level (thought the IPCC did not use the information on recent contributions from land ice in their estimate for 21st century warming.)

The slipperiness, caused by films of water spread over large areas, helps ascertain how quickly a melting ice sheet will slide into the sea as the climate warms — and thus how quickly sea levels will rise.

Greenland is more than twice as large as Texas and if the entire ice sheet melted, scientists estimate global sea levels would rise roughly 24 feet.

Melting can be rapid: as the last ice age ended, the disappearance of the ice sheet covering North America increased sea level by more than a metre per century at times.

The impacts of climate change include global warming, rising sea levels, melting glaciers and sea ice as well as more severe weather events.

Political divisions are less apparent with factual questions that do not infer climate change, such as whether the melting of Greenland and Antarctic land ice, or of Arctic sea ice, could potentially do the most to raise sea levels.

Global warming causes mountain glaciers to melt, which, apart from the shrinking of the Greenlandic and Antarctic ice sheets, is regarded as one of the main causes of the present global sea - level rise.

Totten Glacier, the largest glacier in East Antarctica, is being melted from below by warm water that reaches the ice when winds over the ocean are strong — a cause for concern because the glacier holds more than 11 feet of sea level rise and acts as a plug that helps lock in the ice of the East Antarctic Ice Sheice when winds over the ocean are strong — a cause for concern because the glacier holds more than 11 feet of sea level rise and acts as a plug that helps lock in the ice of the East Antarctic Ice Sheice of the East Antarctic Ice SheIce Sheet.

During glacial periods, sea level falls as water gets locked up in the ice sheets, and in extreme cases the Bering Strait connecting the Bering Sea to the Arctic Ocean closes and becomes a land bridsea level falls as water gets locked up in the ice sheets, and in extreme cases the Bering Strait connecting the Bering Sea to the Arctic Ocean closes and becomes a land bridSea to the Arctic Ocean closes and becomes a land bridge.

Global average sea level has risen by roughly 0.11 inch (3 millimeters) per year since 1993 due to a combination of water expanding as it warms and melting ice sheets.

Many of the projected effects of climate change on the world's oceans are already visible, such as melting polar ice caps and rising sea levels.

A March study shows that one large swath of the ice sheet sits on beds as deep as 8,000 feet below sea level and is connected to warming ocean currents.

Too much debate treats temperature (and especially the most recent global average) as the sole indicator, whereas many other factors are at play including sea levels, ocean acidity, ice sheets, ecosystem trends, and many more.

But, as the world's glaciers recede, melting ice is also contributing to the rise in sea levels.

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.

Sea levels would creep up nearly six inches as a result of that extra heat, with any additional rise due to melting ice sheets unaccounted for in the study's calculations.

Sea levels have been rising worldwide over the past century by between 10 and 20 centimetres, as a result of melting land - ice and the thermal expansion of the oceans due to a planetary warming of around 0.5 degreeC.

Our study suggests that at medium sea levels, powerful forces, such as the dramatic acceleration of polar ice cap melting, are not necessary to create abrupt climate shifts and temperature changes.»

The succession of temperature records has also been accompanied by other notable climate records, including thebiggest ever year - to - year jump in carbon dioxide levels at the Mauna Loa observatory in Hawaii, as well as a record low winter Arctic sea ice peak.

A relatively small amount of melting over a few decades, the authors say, will inexorably lead to the destabilization of the entire ice sheet and the rise of global sea levels by as much as 3 meters.

The melting of Greenland contributes to the global sea level, but the loss of mass also means that the ice sheet's own gravitational field weakens and thus does not attract the surrounding sea as strongly.

The reduced gravitational attraction of the Greenland ice sheet will result in lower sea levels as far away as 2000 km from Greenland in Ireland, Scotland and Norway.

A new study shows that as a glacier's ice melts, bubbles of pressurized ancient air escape into the water, leading to noise levels even louder than those beneath rain - pounded seas heaving with 6 - meter waves.

A working group known as PALSEA2 (Paleo constraints on sea level rise) used past records of local change in sea level and converted them to a global mean sea level by predicting how the surface of the Earth deforms due to changes in ice - ocean loading of the crust, along with changes in gravitational attraction on the ocean surface.

That's bad news for global sea levels as well as would - be ice dwellers.

Because so much water was stored on land as ice sheets, sea levels were likely 120 meters lower than today, exposing the bottom of what is now the English Channel.

When you're talking about global warming and melting ice caps, as everyone seems to be, a five - millimeter adjustment in the modeled diameter of the Earth could be the difference between sea levels appearing to rise from any given year to the next and then appearing to drop.