Sentences with phrase «of less sea ice»

NSIDC scientists point out why we shouldn't be reading too much into one summer of less sea ice decline.

Summer of 2008 shows a large region of less sea ice than normal over the Beaufort Sea compared to 2005 which had less ice cover than normal in the Eastern Siberian Sea and Laptev Sea.

Not exact matches

Further, the less time an ice sheet has to create new layers of ice each winter, the less strong ice is created and built into centuries of previous strong sea ice, leaving ever more vulnerable and easy - to - melt sea ice.

With a shorter season of sea ice, polar bears have less access to marine mammals.

But new analyses like this, which show previously undiscovered deep canyons, suggest that a good chunk of East Antarctica's bed lies below sea level, rendering the ice sheet less stable than previously thought.

For example, Kangerdlugssuaq glacier has lost mass from melting and, in its thinner form, has less weight to speed the flow of its ice toward the sea.

«We can also combine that data with projections of sea ice, to predict how much more or less it will cost these animals to make a living over the next century,» Fischbach says.

As the Arctic summers are getting warmer we may see an acceleration of global warming, because reduced sea ice in the Arctic will remove less CO2 from the atmosphere, Danish scientists report.

In the hot spots of the Amundsen and Bellinghausen seas, the ice shelves lost 18 % of their thickness in less than 20 years.

The negative impacts of warmer winters may be less evident in Nordic countries than in places like Alaska, where people and animals like polar bears and seals are more dependent on the presence of sea ice, according to Serreze.

In addition, now that sea ice blankets the Southern Ocean off the western Antarctic Peninsula far less than before, more water is evaporating and forming precipitation, largely in the form of snow.

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.

In a study published in the actual volume of Nature Communications, geo - and climate researchers at the Alfred - Wegener Institute, Helmholtz Centre for Polar - and Marine Research (AWI) show that, in the course of our planet's history, summertime sea ice was to be found in the central Arctic in periods characterised by higher global temperatures — but less CO2 — than today.

The East Antarctic ice sheet has long been considered relatively stable because most of the ice sheet was thought to rest on bedrock above sea level, making it less susceptible to changes in climate.

The recent string of record - low winter maximums could be a sign that the large summer losses are starting to show up more in other seasons, with an increasingly delayed fall freeze - up that leaves less time for sea ice to accumulate in winter, Julienne Stroeve, an NSIDC scientist and University College London professor, previously said.

In September 2007 less sea ice covered the Arctic than at any point since the U.S. government began keeping records of its decline.

First of all, less sea ice is forming in the region, and secondly, oceanographic recordings from the continental shelf break confirm that the warm water masses are already moving closer and closer to the ice shelf in pulses,» says Dr Hartmut Hellmer, an oceanographer at the AWI and first author of the study.

During the later period, when there was less sea ice, the whales dove significantly longer and deeper than in the earlier period — presumably in search of prey as the animals, in turn, changed their habits because of different ocean conditions brought on by sea ice loss.

Chinstrap and Gentoo penguins, for example, are less dependent on sea ice for their survival and have immigrated into some of the strongholds once dominated by Adélie penguins.

Interestingly, the Antarctic Peninsula supports extremely high krill biomass and predator densities in a region that experiences less sea ice than colder, adjacent regions of the Antarctic [6].

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

The accelerating melting of land ice into the sea makes the surface of the ocean around Antarctica colder, less salty and more easily frozen, leading to extensive sea ice in some areas.

The findings suggest that while the response of Antarctic summer sea ice to human - caused climate change may be less dramatic than in the Arctic, sea ice cover may have declined by as much as 14 % over the last 100 years.

Sea ice extent has dropped precipitously as has the amount of old ice, which is less prone to breakup.

The area of summertime sea - ice during 2007 - 2009 was about 40 % less than the average prediction from IPCC AR4 climate models.

The area of summer sea ice remaining during 2007 - 2009 was about 40 % less than the average projection from the 2007 IPCC Fourth Assessment Report.

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Increased melting of sea ice did occur in the 1920s and 1930s in the Barents Sea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent yeasea ice did occur in the 1920s and 1930s in the Barents Sea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent yeaSea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent years.

During the melt season the albedo of seasonal ice is less than multiyear Seasonal ice absorbs and transmits more sunlight to ocean than multiyear Albedo evolution of seasonal sea ice has 7 phases

Its simple, winter was much smaller in extent, mimicking directly the lesser volume of Arctic sea ice.

Sea ice in the Arctic, on which arctic animals hunt, rest, and reproduce, now covers 15 % less area than it did in 1978; it has thinned to an average of 1.8 meters, compared to 3.1 meters in the 1950s.

However recently I've found myself wavering on the issue of how fast we'll see a transition to a virtually sea ice free state (less than 1M km ^ 2 off the Canadian Arctic Archipelago and the north of Greenland) and it's because of the PIOMAS volume results.

All of this reinforces the idea that the basics remain clear, including that a warming world will have less ice, and that will lead to higher seas.

Of course, during winter as the water freezes on the surface, the resulting sea - ice is less dense, so it floats.

These wildfires release soot into the atmosphere, which accelerates the rate of melting of glaciers, snow and ice it lands upon, which can lead to less reflectivity, meaning more of the sun's heat is absorbed, leading to more global warming, which leads to even more wildfires, not to mention greater sea level rise, which is already threatening coastal areas around the world.

My take is that the tug of war over what's causing today's telegenic heat waves, floods, tempests — and even Arctic sea - ice retreats — distracts from the high confidence scientists have in the long - term (but less sexy) picture: that more CO2 will lead to centuries of climate and coastal changes with big consequences for a growing human population (for better and worse in the short run, and likely mostly for the worse in the long run).

During the so - called Holocene Climate Optimum, from approximately 8000 to 5000 years ago, when the temperatures were somewhat warmer than today, there was significantly less sea ice in the Arctic Ocean, probably less than 50 % of the summer 2007 coverage, which is absolutely lowest on record.

I've been criticized by some environmentalists in recent years for writing that the long - term picture (more CO2 = warmer world = less ice = higher seas and lots of climatic and ecological changes) is the only aspect of human - caused global warming that is solidly established, and that efforts to link dramatic weather - related events to the human influence on climate could backfire should nature wiggle the other way for awhile.

Andy, yes it is true that you have been criticized for writing that the only firm impact of climate change is more CO2 = warmer world = less ice = higher seas.

The established icons of Arctic climate change are the polar bear and, to a lesser extent, those indigenous communities that are trying to maintain traditional ways in the face of slushy floes and the relentless erosion of coasts exposed to waves as sea ice retreats.

The good news is that even with a reduction to less than 50 % of the current amount of sea ice the ice will not reach a point of no return: a level where the ice no longer can regenerate itself even if the climate was to return to cooler temperatures.

If polar bears have been around for few hundred thousand years they have experienced a variety of environmental changes in the Arctic, including periods when there was more sea ice than present as well as periods when seasonal sea ice was considerably less than at present.

The Healy, a younger, larger, but less sturdy ice - breaking ship, just headed out on a surveying cruise charting new stretches of the Chukchi Cap, an extension of the continental slope off Alaska that could — if the Senate ever approves the Law of the Sea Treaty — add a big swath of Arctic Ocean seabed as a potential economic resource.

The denialist cut - paste attempts to — via logical fallacy, hand - waving and dissembling — make it appear that... that... well, who knows but it isn't germane nor does it refute eroding coastlines due to less ice, nor does the denialist cut - paste refute the facts of melting permafrost, CH4 release, warmer Arctic temps, birds moving north into the Arctic, increased freshwater flow into the northern seas, and numerous other indicators.

So here we are, still facing a clear long - term picture (more CO2 = warming world = less ice + higher seas + lots of changing climate patterns), but sufficient murk in the short run to fuel the «green noise» and «destructive interference» in climate discourse.

[Andy Revkin — On Arctic ice trends, I have a post coming shortly on the latest update from the world's leading teams of sea ice experts, showing this year's retreat is unlikely to match last year's, while the long - term trend is still heading toward ever less summer ice.

This is far from a settled story, but most of the scientists I know now have the feeling that in a high CO2 world with less sea ice, the chill from a THC shutdown would be a lot less.

There was a USGS 2010 paper by D Douglas that predicted «For the Bering Sea, median March ice extent is projected to be about 25 percent less than the 1979 — 1988 average by mid-century and 60 percent less by the end of the century» But if Bering ice is driven by the PDO I suspect that prediction will fail.

o 8000 of the 10000 years since the last ice age were warmer than now and generally had less CO2 and lower sea levels o For 3000 years (from 5000 BP to 2000 BP) world temperatures were falling whilst CO2 levels were rising o Manâ??

A scenario with this rate of ice reduction suggests that the Arctic Sea will be completely ice - free in summer time in less than two decades.