Sentences with phrase «more sea ice cover»

Polar bears had more sea ice cover and better hunting this year in Hudson's Bay than in other recent years.

They then used the satellite record of Arctic sea ice extent to calculate the rates of sea ice loss and then projected those rates into the future, to estimate how much more the sea ice cover may shrink in approximately three polar bear generations, or 35 years.

Not exact matches

Although the ice cover has increased over the past few years, the Arctic's sea ice is now much thinner than it was just a few years ago, making it more vulnerable to future warming.

«One societally relevant implication is that more storminess probably means more erosion of Arctic coastlines, especially in tandem with declines in buffering sea ice cover and increases in thawing coastal permafrost,» concluded Dr. Vavrus.

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.

«If there were a link, it would be more likely to occur in fall [when the Arctic sea ice is at a low and the region is warm] than it would in January [when the Arctic is ice - covered and cold], so from that point of view, it's not a compelling candidate at this time of year,» Hoerling said.

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 scientists were able to use a test scenario in the Greenland Sea to demonstrate that ALES + returns water levels for ice - covered and open ocean regions which are significantly more precise than the results of previous evaluation methods.

«Historically, the Arctic had a thicker, more rigid sea ice that covered more of the Arctic basin, so it was difficult to tell whether El Niño had any effect on it,» said Richard Cullather, a climate modeler at Goddard.

«We expressed a need for something that could provide more immediate and local observation that could be launched easily and cover enough distance to conduct reconnaissance on potential routes through drifting sea ice,» says Cyrus Unvala, a lieutenant, junior grade, who served as public affairs officer onboard the Polar Star.

Sea ice and snow cover loss create a feedback look that can accelerate global warming; with fewer reflective surfaces on the planet, more sunlight can thereby be absorbed, driving surface temperatures even higher, the scientists explained.

The scientists theorize that a warming Arctic environment has reduced sea ice cover, allowing for more wave action that stirs up sediments and mobilizes more radium.

«While more research should be done, we should be aware that an increasing number of studies, including this one, suggest that the loss of Arctic sea ice cover is not only a problem for remote Arctic communities, but could affect millions of people worldwide.»

The knock - on effects of such a transition would be huge — they would cause marked increase of warming at the pole, since open water absorbs more of the sun's energy than ice - covered seas.

Since the Artics» sea - ice cover is shrinking due to global warming, the polar region takes up more heat.

Leaving aside the collapse of the Larsen - B ice shelf and other ice shelves in Antarctica, is it too simplistic to expect that dramatic changes should be anticipated first in the Arctic because it is sea covered by a few meters of sea ice and therefore more susceptible to change, in comparison to Antarctica (which is obviously land covered by glacial ice up to several kilometers thick in places)?

Whilst it's natural to start with air temperatures, a more thorough examination should be as inclusive as possible; snow cover, ice melt, air temperatures over land and sea, even the sea temperatures themselves.

Related Content A Closer Look at Arctic Sea Ice Melt and Extreme Weather «Astonishing» Ice Melt May Lead to More Extreme Winters Globe Records Fourth Warmest August as Arctic Ice Melts Video: Extreme Weather and Rapid Arctic Warming Arctic Has Lost Enough Ice to Cover Canada and Texas

a) Satellite image showing fast disintegration of sea ice over a polar continental shelf; b) Zoobenthos on an Antarctic continental shelf; c) Examples of sea mosses (specimens on the left are from an open - water location and hence have had more plankton to feed on); and d) Dead bryozoan and other benthic skeletons covering the seabed, most likely to be buried, sequestering their blue carbon in the seabed.

«Sea level is rising much faster and Arctic sea ice cover shrinking more rapidly than we previously expectSea level is rising much faster and Arctic sea ice cover shrinking more rapidly than we previously expectsea ice cover shrinking more rapidly than we previously expected.

Rather than projecting out to the mid-twenty-first century, it is clear that the Arctic Ocean already has crossed a threshold with open water during the summer and first - year sea ice during the winter covering more than 50 percent of its area.

Leaving aside the collapse of the Larsen - B ice shelf and other ice shelves in Antarctica, is it too simplistic to expect that dramatic changes should be anticipated first in the Arctic because it is sea covered by a few meters of sea ice and therefore more susceptible to change, in comparison to Antarctica (which is obviously land covered by glacial ice up to several kilometers thick in places)?

He notes that the sat photos show that cloud cover remains low and that the ice is very mobile at a time when the pack should be most firm (not really a surprise since ocean temps are much more important than air temps, and apparently it's the ocean temps that have been the largest factor in the recent sharp sea ice reduction).

While methane is short - lived, all it has to do is shift the global energy balance for a while, to trigger irreversible loss of tundra methane, loss of Arctic sea ice cover and more calthrate loss, then loss of ice sheets and everything else Hansen et al promise.

However, I've never seen a single media article in any U.S. press outlet that covered these issues — the large - scale evidence for global warming (melting glaciers, warming poles, shrinking sea ice, ocean temperatures) to the local scale (more intense hurricanes, more intense precipitation, more frequent droughts and heat waves) while also discussing the real causes (fossil fuels and deforestation) and the real solutions (replacement of fossil fuels with renewables, limiting deforestation, and halting the use of fossil fuels, especially coal and oil.)

There are subtle effects such as the planet losing more heat from the open sea than from ice - covered region (some of this heat is absorbed by the atmosphere, but climates over ice - covered regions are of more continental winter character: dry and cold).

Maue discussed how «two camps» of researchers claim to have increased predictability of such weather events over periods of a month or more by using clues either in the Arctic, related to the extent of sea ice and snow cover, or in the temperature of surface waters across the Pacific Ocean.

(57j) For surface + tropospheric warming in general, there is (given a cold enough start) positive surface albedo feedback, that is concentrated at higher latitudes and in some seasons (though the temperature response to reduced summer sea ice cover tends to be realized more in winter when there is more heat that must be released before ice forms).

Updated, Nov. 25, 10:41 a.m. Ruth Teichroeb, the communications officer for Oceans North: Protecting Life in the Arctic, an initiative of the Pew Charitable Trusts, sent a note this evening about new steps related to an issue I've covered here before — the rare and welcome proactive work by Arctic nations to ban fishing in the central Arctic Ocean ahead of the «big melt» as summer sea ice retreats more in summers in a human - heated climate.

Re 9 wili — I know of a paper suggesting, as I recall, that enhanced «backradiation» (downward radiation reaching the surface emitted by the air / clouds) contributed more to Arctic amplification specifically in the cold part of the year (just to be clear, backradiation should generally increase with any warming (aside from greenhouse feedbacks) and more so with a warming due to an increase in the greenhouse effect (including feedbacks like water vapor and, if positive, clouds, though regional changes in water vapor and clouds can go against the global trend); otherwise it was always my understanding that the albedo feedback was key (while sea ice decreases so far have been more a summer phenomenon (when it would be warmer to begin with), the heat capacity of the sea prevents much temperature response, but there is a greater build up of heat from the albedo feedback, and this is released in the cold part of the year when ice forms later or would have formed or would have been thicker; the seasonal effect of reduced winter snow cover decreasing at those latitudes which still recieve sunlight in the winter would not be so delayed).

This would certainly explain why arctic sea ice cover has been absolutely crashing in recent years while the HARDCRU / GISS global average temps had been increasing more modestly.

«Higher northern latitudes are getting warmer, Arctic sea ice and the duration of snow cover are diminishing, the growing season is getting longer and plants are growing more,» said Ranga Myneni of Boston University's Department of Earth and Environment.

Should it be attained, this state would be more «symmetric» than the present climate, with comparable areas of ice / sea - ice cover in each hemisphere, and would represent the culmination of 50 million years of evolution from bipolar nonglacial climates to bipolar glacial climates.

Related Content A Closer Look at Arctic Sea Ice Melt and Extreme Weather «Astonishing» Ice Melt May Lead to More Extreme Winters Globe Records Fourth Warmest August as Arctic Ice Melts Video: Extreme Weather and Rapid Arctic Warming Arctic Has Lost Enough Ice to Cover Canada and Texas

The warming of approximately 0.1 — 0.2 °C per decade that has resulted is very likely the primary cause of the increasing loss of snow cover and Arctic sea ice, of more frequent occurrence of very heavy precipitation, of rising sea level, and of shifts in the natural ranges of plants and animals.

(William: Come on man, the sun is causing what is observed) Phenomena such as the Younger Dryas and Heinrich events might only occur in a «glacial» world with much larger ice sheets and more extensive sea ice cover.

If all of the currently attainable carbon resources [estimated to be between 8500 and 13.600 GtC (4)-RSB- were burned, the Antarctic Ice Sheet would lose most of its mass, raising global sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the ice - covered area is depicted in white (ice - free bedrock in browIce Sheet would lose most of its mass, raising global sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the ice - covered area is depicted in white (ice - free bedrock in browice - covered area is depicted in white (ice - free bedrock in browice - free bedrock in brown).

However, even a smaller figure (I had calculated about 0.17 W / m ^ 2 based on your inflated figure for total planetary albedo, but you can check it out) is still significant when compared with the total flux imbalance, which I think is a more informative comparison than an arbitrarily selected change in cloud cover, because it compares the sea ice reduction with the effects of all climate variations that have been operating in recent years..

Additionally, the less sea ice covers the surface of the ocean, the more sunlight is absorbed by the water, which scientists warn could accelerate the Arctic's warming.

Many more of Monckton's claims — including others about snow cover and sea - ice — are being diligently examined against the peer - reviewed science — yet again — by SkepticalScience, which has begun a series looking at his debating points in detail.

Using satellites we can estimate both sea ice area, which is the area of the sea which is ice - covered, and ice extent, which is the area of ocean which has 15 % or more ice cover.

In simulations with no ponds or aerosols in sea ice, the Arctic ice is over a meter thicker and retains more summer ice cover.

Increasing greenhouse gases should, by simple physics, strengthen the polar vortex, but what favors weakening is the loss of sea ice and more snow cover in Eurasia, Those work together to force this weakening of the polar vortex that we're seeing.»

When Arctic sea ice opens up more it exposes more water to evaporative and radiative cooling both of which are nullified when ice covers the water.

And remember, the satellite data are one small part of a vast amount of data that overwhelmingly show our planet is warming up: retreating glaciers, huge amounts of ice melting at both poles, the «death spiral» of arctic ice every year at the summer minimum over time, earlier annual starts of warm weather and later starts of cold weather, warming oceans, rising sea levels, ocean acidification, more extreme weather, changing weather patterns overall, earlier snow melts, and lower snow cover in the spring...

Scientists at NASA Goddard Space Flight Center have also reported that satellite measurements show that sea ice now covers about 2 percent more area around Antarctica than it did two decades ago, another suggestion of recent cooling.

Recently published research by Barber and colleagues shows that the ice cover was even more fragile at the end of the melt season than satellite data indicated, with regions of the Beaufort and Chukchi Seas covered by small, rotten ice floes.

Disappearing Arctic sea ice — summer ice extent was at its lowest level in recorded history in 2007 and almost hit that level in 2008 — also will warm the Arctic Ocean, since a dark, ice - free sea absorbs more solar radiation than a white, ice - covered one.

Heavy sea ice is a bigger threat to bearded seals, so they avoid regions where sea ice cover is more than 90 %.

Furthermore, the Arctic has warmed more than twice as fast as the global average, a phenomenon known as Arctic amplification, and stimulated by the combined increasing Arctic temperatures and rapid loss of sea ice in all seasons along with declining snow cover in the spring and early summer.