Sentences with phrase «polar sea ice at»

Is polar sea ice at a record low this winter of 2017/18?

Not exact matches

That corresponds to a roughly 3 1/2 week shift at either end — and seven weeks of total loss of good sea ice habitat for polar bears — over the 35 years of Arctic sea ice data.

The case of this one polar bear and the failure of her offspring to survive in the new environmental conditions of the Arctic doesn't bode well for the future of the species, especially as Arctic sea ice continues to retreat at a record pace.

The Interior Department lists the polar bear as a «threatened» species — one at risk of becoming endangered — due to dangerous declines in their sea ice habitat

At a hamlet on the southern end of Ellesmere called Grise Fiord, whose Inuit name means «the place that never thaws out,» the Inuit have watched the sea ice that supports their traditional seal, polar bear and whale hunting decrease every year.

«Billions of juvenile fish under the Arctic sea ice: New under - ice net used in large - scale study on the prevalence of polar cod at the ice underside.»

«When we look forward several decades, climate models predict such profound loss of Arctic sea ice that there's little doubt this will negatively affect polar bears throughout much of their range, because of their critical dependence on sea ice,» said Kristin Laidre, a researcher at the University of Washington's Polar Science Center in Seattle and co-author of a study on projections of the global polar bear population.

This past September the National Snow and Ice Data Center in Boulder, Colo., which collects polar and ice information for the government, announced that there was less sea ice covering the Arctic Ocean than at any time since satellite measurements began in 19Ice Data Center in Boulder, Colo., which collects polar and ice information for the government, announced that there was less sea ice covering the Arctic Ocean than at any time since satellite measurements began in 19ice information for the government, announced that there was less sea ice covering the Arctic Ocean than at any time since satellite measurements began in 19ice covering the Arctic Ocean than at any time since satellite measurements began in 1979.

The research is timely given the extreme winter of 2017 - 2018, including record warm Arctic and low sea ice, record - breaking polar vortex disruption, record - breaking cold and disruptive snowfalls in the United States and Europe, severe «bomb cyclones» and costly nor'easter s, said Judah Cohen, director of seasonal forecasting at AER and lead author of the study.

Sea ice is a crucial part of the ecosystems at both poles, providing habitat and influencing food availability for penguins, polar bears and other native species.

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.»

A new review analyzing three decades of research on the historic effects of melting polar ice sheets found that global sea levels have risen at least six meters, or about 20 feet, above present levels on multiple occasions over the past three million years.

«This paper ties it all together and shows a very clear relationship between the disappearance of sea ice and increasing predation intensity on seabirds,» says Andrew Derocher, a polar bear specialist and Arctic ecologist at the University of Alberta in Edmonton, Canada.

The P - 3 Orion, based at NASA's Wallops Flight Facility in Virginia, will carry IceBridge's most comprehensive instrument suite: a scanning laser altimeter that measures surface elevation, three types of radar systems to study ice layers and the bedrock underneath the ice sheet, a high - resolution camera to create color maps of polar ice, and infrared cameras to measure surface temperatures of sea and land ice.

«People have been talking about the possible link between winds and Antarctic sea ice expansion before, but I think this is the first study that confirms this link through a model experiment,» commented Axel Schweiger, a polar scientist at the UW Applied Physics Lab.

When the model held the polar winds at a constant level, the sea ice increased only 20 percent as much.

More collaboration and direct dialogue between polar researchers at venues and conferences will facilitate joint studies in Arctic forests, tundra, and sea ice.

Climate change is pushing temperatures up most rapidly in the polar regions and left the extent of Arctic sea ice at 1.79 million square miles at the end of the summer melt season.

Impact of ice melt on storms Freshwater injection onto the North Atlantic and Southern Oceans causes increase of sea level pressure at middle latitudes and decrease at polar latitudes.

And especially now with human development and climate change, the world is being altered at an incredible pace — from rising seas, disappearing polar ice, to our major rivers and estuaries and how they have been changed by us.

These are increasingly impactful, intersecting phenomena for densely populated coastal areas that are being developed at the same time that melting polar ice is causing sea levels to rise.

At a time when melting polar sea ice is causing so many to focus on which political power will place its flag over the Arctic, controlling the Northwest Passage shipping lanes and the petroleum resources beneath the sea ice, Miami artist Xavier Cortada has developed a project that engages people across the world below to plant a green flag and native tree to help address global climate change.

Her work showed that polar bears, while best known for their life at sea or on sea ice pursuing seals, have been able, at least in some circumstances, to gain significant nutrition on land as well, scarfing down geese and goose eggs, grasses and other fare when sea ice is in retreat.

Now the polar research group at the University of Washington, which annually deploys the sea ice instruments and autonomous cameras providing the imagery that flooded the «Instanet,» has posted a helpful primer.

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.

Sea ice is critical for polar marine ecosystems in at least two important ways: (1) it provides a habitat for photosynthetic algae and nursery ground for invertebrates and fish during times when the water column does not support phytoplankton growth; and (2) as the ice melts, releasing organisms into the surface water [3], a shallow mixed layer forms which fosters large ice - edge blooms important to the overall productivity of polar seas.

This change speed is dizzying us in the Arctic, even snow buntings come back very early this spring, and polar bears are seen on the thin enough sea ice for seals at the North Pole.

You can get a fresh look at the sea ice by clicking here to check out the North Pole Webcams left behind in April by the polar research team.

At an average height of 13,000 feet above sea level, they make up the largest area of ice outside the polar regions, nearly a sixth of the world's total.

Dr. Will Chapman's Cryosphere Today web page offers an archive of daily polar sea ice cap concentrations (1979 — present) at:

It is not that the polar regions are amplifying the warming «going on» at lower latitudes, it is that any warming going on AT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...&raquat lower latitudes, it is that any warming going on AT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...&raquAT THE POLES is amplified through inherent positive feedback processes AT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...&raquAT THE POLES, and specifically this is primarily the ice - albedo positive feedback process whereby more open water leads to more warming leads to more open water, etc. *** «Climate model simulations have shown that ice albedo feedbacks associated with variations in snow and sea - ice coverage are a key factor in positive feedback mechanisms which amplify climate change at high northern latitudes...&raquat high northern latitudes...»

The findings reinforce suggestions that strong positive ice — temperature feedbacks have emerged in the Arctic15, increasing the chances of further rapid warming and sea ice loss, and will probably affect polar ecosystems, ice - sheet mass balance and human activities in the Arctic...» *** This is the heart of polar amplification and has very little to do with your stated defintion of amplifying the effects of warming going on at lower latitudes.

The ACIA report described how the retreat of the sea ice has devastating consequences for polar bears, whose very survival may be at stake.

We do not have to lose the polar ice - caps for disastrous sea - level rise to occur, given the number of major cities situated at or close to sea - level.

Just look at the polar sea ice graph.

For example, conditions at the poles affect how much heat is retained by the earth because of the reflective properties of ice and snow, the world's ocean circulation depends on sinking in polar regions, and melting of the Antarctic and Greenland ice sheets could have drastic effects on sea level.

If both Greenland and West Antarctica shed the entirety of their ice burden, global sea levels would rise by 12 to 14 m. Although these icecaps would not disintegrate within a century, the loss of even a third of their mass — quite plausible if the rate of polar ice loss continues to double each decade — would force up the oceans by at least 4 m, with disastrous socioeconomic and environmental consequences.

Yet, Polar Bears International («Save Our Sea Ice»)-- who were surely in and around Churchill in 2010 and 2006 watching polar bears — just posted an alarming statement about local conditions, implying that slow freeze - up of Hudson Bay this year is a reflection of the fact that «sea ice is at a record low across the Arctic.&raqSea Ice»)-- who were surely in and around Churchill in 2010 and 2006 watching polar bears — just posted an alarming statement about local conditions, implying that slow freeze - up of Hudson Bay this year is a reflection of the fact that «sea ice is at a record low across the Arctic.&raqIce»)-- who were surely in and around Churchill in 2010 and 2006 watching polar bears — just posted an alarming statement about local conditions, implying that slow freeze - up of Hudson Bay this year is a reflection of the fact that «sea ice is at a record low across the Arctic.&raqsea ice is at a record low across the Arctic.&raqice is at a record low across the Arctic.»

At least a dozen polar bears that besieged a remote Russian weather station on an island in the Kara Sea during the first two weeks of September prompted a few media pundits to suggest that loss of summer sea ice due to global warming may be forcing polar bears to hunt humans for foSea during the first two weeks of September prompted a few media pundits to suggest that loss of summer sea ice due to global warming may be forcing polar bears to hunt humans for fosea ice due to global warming may be forcing polar bears to hunt humans for food.

A map of sea ice extent at the climax of the Last Glacial Maximum (both perennial and seasonal ice), prepared with the help of a colleague, makes it possible to discuss what genetic and fossil evidence can tell us about the probable effects of glacial conditions on polar bears and ringed seals.

At this time of year, sea ice extent numbers are meaningless for polar bears.

Today, I'll take a look at sea ice and ringed seal habitat in the Gulf of Boothia and M'Clintock Channel, as well as information from a study on polar bear diets, which together shine some light on why the Gulf of Boothia is such a great place for polar bears.

Sea ice minimum levels are falling at the rate of 14 % a decade in the Arctic, and polar bears have been feeling the loss.

Bottom line: Barents Sea polar bears are loyal to this region because the eastern portion has the habitat they require to thrive even when sea ice cover in the western portion essentially disappears for thousands of years at a tiSea polar bears are loyal to this region because the eastern portion has the habitat they require to thrive even when sea ice cover in the western portion essentially disappears for thousands of years at a tisea ice cover in the western portion essentially disappears for thousands of years at a time.

This summer school is aimed at postgraduate students and early career scientists who would like to obtain a solid grounding in polar climate system science, with a particular focus on the atmosphere, ocean and sea ice and their interactions.

Researchers at CIRES» National Snow and Ice Data Center [About NSIDC] investigate the dynamics of Antarctic ice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grouIce Data Center [About NSIDC] investigate the dynamics of Antarctic ice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grouice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grouice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen grouice, and the distribution and characteristics of seasonally and permanently frozen ground.

For more on the terrestrial foods topic, see my detailed discussion in this previous post, and this recent (March 30) ScienceNews report on yet another, largely anecdotal «polar bears resort to bird eggs because of declining sea ice» story (see photo below, based on a new paper by Prop and colleagues), which was also covered March 31 at the DailyMail («Polar bears are forced to raid seabird nests as Arctic sea ice melts — eating more than 200 eggs in two hours,» with lots of hand - wringing and sea ice hype but little mention of the fact that there are many more bears now than there were in the early 1970s around Svalbard or that the variable, cyclical, AMO (not global warming) has had the largest impact on sea ice conditions in the Barents Sesea ice» story (see photo below, based on a new paper by Prop and colleagues), which was also covered March 31 at the DailyMail («Polar bears are forced to raid seabird nests as Arctic sea ice melts — eating more than 200 eggs in two hours,» with lots of hand - wringing and sea ice hype but little mention of the fact that there are many more bears now than there were in the early 1970s around Svalbard or that the variable, cyclical, AMO (not global warming) has had the largest impact on sea ice conditions in the Barents Sesea ice melts — eating more than 200 eggs in two hours,» with lots of hand - wringing and sea ice hype but little mention of the fact that there are many more bears now than there were in the early 1970s around Svalbard or that the variable, cyclical, AMO (not global warming) has had the largest impact on sea ice conditions in the Barents Sesea ice hype but little mention of the fact that there are many more bears now than there were in the early 1970s around Svalbard or that the variable, cyclical, AMO (not global warming) has had the largest impact on sea ice conditions in the Barents Sesea ice conditions in the Barents SeaSea).

Southern polar sea ice reached its peak at the end of August, and November, December, January and February all saw rapid declines.

For the year 2016, sea ice extent in both polar regions was at levels well below what is typical of the past several decades.

In the polar regions, where few such storms occur, heating by greenhouse gases remains at the surface, and is exacerbated by the melting of bright sea ice that exposes more of the dark ocean surface and causes more sunlight to be absorbed.