Sentences with phrase «of polar sea»

30 March, 2017 — NASA scientists say that in the last six months the world has lost an area of polar sea ice that is bigger than Mexico.

Since 2010, the European Space Agency's CryoSat satellite has circled the Earth and monitored the state of the polar sea ice, along with the ice sheets that cover Antarctica and Greenland.

They found that the circulation of air — and its temperature and humidity — could contribute 60 % of the polar sea ice decline since 1979.

There is a widespread idea that there are actual and robust measurements of polar bear populations, the extent of glaciers, the rate of sea - level rise, and the extent of polar sea ice.

Have any studies appeared on coupling of AMOC variation and that of polar sea albedo from E. hux, Nitzschia and other plankton blooms?

Although a recent downward trend in coverage is clearly visible by naked eye inspection, Goddard invites us to believe there has ``... been no net gain or loss of polar sea ice since records began.»

«MODIS observations of polar sea ice were combined with observations of Antarctica made by the National Oceanic and Atmospheric Administration's AVHRR sensor — the Advanced Very High Resolution Radiometer.»

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.

Not exact matches

One initiative Canada could push is the creation of an international Arctic fisheries agreement, which would protect the fragile polar ecosystem from unregulated commercial fishing in the high seas of the Arctic.

The sea is just 5 ° north of the Martian equator and would be the first discovery of a large body of water beyond the planet's polar ice caps.

Female polar bears prowling springtime sea ice have extreme weight swings, some losing more than 10 percent of their body mass in just over a week.

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

Scientists with Cassini's radar investigation will be looking this week at their final set of new radar images of the hydrocarbon seas and lakes that spread across Titan's north polar region.

A new University of Washington study, with funding and satellite data from NASA and other agencies, finds a trend toward earlier sea ice melt in the spring and later ice growth in the fall across all 19 polar bear populations, which can negatively impact the feeding and breeding capabilities of the bears.

«This study shows declining sea ice for all subpopulations of polar bears,» said co-author Harry Stern, a researcher with the UW's Polar Science Center.

According to guidelines based on several years — and $ 10 million — of environmental - impact research, the Navy is not permitted to use the low - frequency sonar within 12 nautical miles of any coastline, in any marine sanctuary, near any marine - mammal «biologically important area,» or in polar seas.

The polar bear, also known as the white bear, northern bear, sea bear, or nanuq in some Inuit languages, is a species of bear that is native to the Arctic and the apex predator within its range.

Scientists now believe that the projected decreases in the polar sea ice due to global warming will have a significant negative impact or even lead to extinction of this species within this century.

POLAR BEAR VLOGS Wild female polar bears wore collars with a video camera and other instruments for a little over a week as the bears roamed sea ice off the coast of Alaska during spPOLAR BEAR VLOGS Wild female polar bears wore collars with a video camera and other instruments for a little over a week as the bears roamed sea ice off the coast of Alaska during sppolar bears wore collars with a video camera and other instruments for a little over a week as the bears roamed sea ice off the coast of Alaska during spring.

The analysis shows that the critical timing of the sea ice break - up and sea ice freeze - up is changing in all areas in a direction that is harmful for polar bears.

Such erosion can result from any number of factors, including the simple inundation of the land by rising sea levels resulting from the melting of the polar ice caps.

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.

Sea ice - associated decline in body condition leads to increased concentrations of lipophilic pollutants in polar bears (Ursus maritimus) from Svalbard, Norway.

The International Union for the Conservation of Nature (IUCN), which maintains the international «Red List» of threatened species, considers the polar bear «vulnerable» due to climate change - induced retreating sea ice.

It sits in Ligeia Mare, a sea made of methane, ethane and nitrogen in Titan's northern polar region.

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

Mori et al. identified two circulation patterns that drove winter temperatures in Eurasia from 1979 to 2013: the Arctic Oscillation (which confines colder air to the polar latitudes) and a pattern dubbed «Warm Arctic and Cold Eurasia» (WACE), which correlated both to sea - ice loss in the Barents - Kara Sea and to particularly cold winters; its impact has more than doubled the probability of severe winters in central Eurassea - ice loss in the Barents - Kara Sea and to particularly cold winters; its impact has more than doubled the probability of severe winters in central EurasSea and to particularly cold winters; its impact has more than doubled the probability of severe winters in central Eurasia.

The combination of polar and nonpolar ice combined to raise sea levels by more than a millimeter in the last decade

The Bering Strait is a sea strait between Cape Dezhnev, Russia, the easternmost point (169 degrees 43» W) of the Asian continent and Cape Prince of Wales, Alaska, the westernmost point (168 degrees 05» W) of the North American continent, with latitude of about 65 degrees 40» North, slightly south of the polar circle.

As contemporary signs of global warming, Schneider and his colleagues point to rapidly melting polar icecaps, ocean acidification, loss of coral reefs, longer - lasting droughts, more devastating wildfires, and rising sea level.

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.

An international «Red List» of threatened species says that the polar bear is vulnerable to extinction because of a projected decline in its habitat linked to climate change that is melting sea ice in the Arctic.

The rule in question was finalized by the Bush administration in December, six months after the polar bear was declared a threatened species due to the melting of its sea - ice habitat.

«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.»

«For the first time, we've been able to use a special net directly below the sea ice to catch a large number of polar cod, and therefore to estimate their prevalence over a large area.

Fox accompanies a team of NASA scientists as they drive a refurbished orange Humvee across a frozen channel in the Canadian High Arctic, facing melting sea ice, mechanical breakdown, and the threat of marauding polar bears.

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.

«That means the rapid retreat of Arctic sea ice poses an especially serious threat for polar cod.

If the polar cod population in the Barents Sea actually does shrink, the juvenile fish under the ice of the Eastern Arctic could become even more important — especially in order to make up for losses elsewhere.

In 2004, during an aerial survey of bowhead whales in the Beaufort Sea north of Alaska, Monnett and his colleague Jeffrey Gleason observed four dead polar bears.

«We must do all we can to help the polar bear recover, recognizing that the greatest threat to the polar bear is the melting of Arctic sea ice caused by climate change,» Salazar said.

«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.

The U.S. Department of the Interior Wednesday listed the polar bear as a threatened species under the Endangered Species Act (ESA) of 1973 based on evidence that the animal's sea ice habitat is shrinking and is likely to continue to do so over the next several decades.

«I've accepted that the loss of sea ice, not subsistence [hunting of the animal] or the oil and gas industries, is the reason for the threat to the polar bears,» which are already protected by the more stringent Marine Mammal Protection Act of 1972, Kempthorne said.

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.

In some parts of the Arctic, sea ice loss is causing polar bears to spend longer periods on shore each summer.

«On short time scales, we can have variable responses to the loss of sea ice among subpopulations of polar bears,» Laidre said.

«For example, in some parts of the Arctic, such as the Chukchi Sea, polar bears appear healthy, fat and reproducing well — this may be because this area is very ecologically productive, so you can lose some ice before seeing negative effects on bears.

U.S. District Court Judge Claudia Wilken in Oakland, Calif., on April 29 ordered the Bush administration to stop dragging its feet on the fate of polar bears and decide by May 15 whether declining sea ice in the Arctic threatens their existence.