Sentences with phrase «decline in sea ice in»

The head - turning decline in sea ice in 2007, for example, was caused mainly by sunny skies and a prolonged dipole: high pressures over the Beaufort Sea, combined with lows near Siberia, pulled in considerable warmth from the Pacific side and increased ice export to the Atlantic.

Not exact matches

«As krill stock started to decline dramatically with the lack of sea ice in the late 1980s, so did the survival of these young,» said Trivelpiece, whose work will be published online this week by the Proceedings of the National Academy of Sciences.

Now, a new modeling study finds a link between these winters and the decline of sea ice in a part of the Arctic Ocean known as the Barents - Kara sea region, bordering Norway and Russia.

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

The increase in the amount of water vapor could be related to the decline in sea ice, they say.

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

«This shift is characterized by the persistent decline in the thickness and summer extent of sea - ice cover and by a warmer, l

After a decade with nine of the lowest arctic sea - ice minima on record, including the historically low minimum in 2012, we synthesize recent developments in the study of ecological responses to sea - ice decline.

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.

Climate sceptics point to increased sightings by indigenous Canadian communities, though that could be due to declines in sea ice driving the animals ashore.

May and June this year also saw record low sea ice levels, though the decline eased off in July.

«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.

An earlier study based on maps of the Antarctic ice produced by American weather satellites, by Joe Jacka and colleagues at the Australian Antarctic Division in Hobart, Tasmania, showed a similar decline in Antarctic sea ice.

In one of them, the bear numbers declined directly proportionally with sea ice.

He pointed to computer models he and his colleagues studied that project a 30 percent decline in sea ice by 2050.

«The Arctic is facing a decline in sea ice that might equal the negative record of 2012: Data collected by the CryoSat - 2 satellite reveal large amounts of thin ice that are unlikely to survive the summer.»

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.

The rate of decline in albedo in the sea ice zone during August was approximately 3 % per decade.

The study also determined what factors had the greatest impact on the decline in sea ice albedo.

Documented declines in sea ice and anticipation of massive melting that threatens the bears» habitat prompted the action.

The trends revealed by the data were clear: The average albedo in the northern area of the Arctic Ocean, including open water and sea ice, is declining in all summer months (May - August).

Although researchers have been generally successful at modelling the huge declines in Arctic sea ice, the extent of Antarctic sea ice has actually increased in recent years, contrary to the predictions of models.

But «while the Arctic maximum is not as important as the seasonal minimum, the long - term decline is a clear indicator of climate change,» Walt Meier, a sea ice researcher at the NASA Goddard Space Flight Center, said in a statement.

«Because these plants are photosynthetic, it's not surprising to find that as the amount of sea ice cover declined, the amount of [photosynthesis] increased,» says biological oceanographer Kevin Arrigo of Stanford University's School of Earth Sciences, who led an effort to use the MODIS (Moderate Resolution Imaging Spectroradiometer) devices on NASA's Terra and Aqua satellites to determine changes in phytoplankton growth.

What's happening in the Arctic would be impossible without a century of global warming causing a long - term decline in sea ice levels — but it is actually a short - term weather event.

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

Amstrup adds, «It fills a gap in our otherwise extensive knowledge of polar bear ecology and corroborates previous findings that the key to polar bear conservation is arresting the decline of their sea ice habitat.»

Arctic warming has caused a rapid decline in sea ice cover during the past decade that could seriously affect everything from Arctic ecosystems to shipping and oil drilling.

Researchers also tracked sea ice cover in the Arctic over these two periods and found that the ice declined substantially from the first to the second period.

Exactly how sea - ice decline might affect species interactions in this and other types of food webs on land in the Arctic is a question that deserves greater attention,» Post said.

Through satellite images, researchers have observed a steep decline in the average extent of Arctic sea ice for every month of the year.

A comprehensive review (pdf) by the US Fish and Wildlife Service concluded that shrinking sea ice is the primary cause for the decline seen in these populations, and it recently proposed listing polar bears as threatened (pdf) under the Endangered Species Act.

Projected 21st Century Decline Snow Cover Overlying the Arctic Sea Ice and Implications for the Sea Ice and Arctic Climate in CESM / CCSM Benjamin Blazey

Something that goes along with this change in atmospheric circulation is reduced sea ice in the region (while sea ice in Antarctica has been increasing on average, there have been significant declines off the West Antarctic coast for the last 25 years, and probably longer).

«So there's a definite recent decline in sea ice,» Jessica Blunden, a climatologist with ERT, Inc. at NCEI and the lead editor of the report, said.

Cvijanovic, I. & Caldeira, K. Atmospheric impacts of sea ice decline in CO2 induced global warming.

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

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.

Over in the northern hemisphere, meanwhile, Arctic sea ice has declined rapidly over the same period.

That is contributing to the quickness in overall sea ice decline.

You can see how Arctic sea ice volume has declined through the satellite record in the chart below.

Overall, though, Arctic sea ice has seen a clear decline since satellites first began monitoring it in 1979.

Notably, both the decline in sea level and the decline in temperature occurred during the so - called European «Medieval Warm Period,» providing additional evidence that the «Medieval Warm Period» and «Little Ice Age» were not globally synchronous phenomena.

Related Content As Sea Ice Declines, Winter Shifts in Northern Alaska Record Warmth in Eastern U.S., Temps Tumble in Alaska NOAA to Map Alaska's Increasingly Ice - Free Arctic Waters Coverage of 2012 Summer Heat Waves

One study, published in Proceedings of the National Academy of Sciences in January, hinted at such a mechanism when it linked sea ice decline to apparent changes in the Arctic Oscillation during several winters preceded by large sea ice losses.

However, the share of thermal expansion in global sea level rise has declined in recent decades as the shrinking of land ice has accelerated (Lombard et al 2005).

Observed decreases in arctic sea ice extent have been shown to be inconsistent with simulated internal variability, and consistent with the simulated response to human influence, but SH sea ice extent has not declined.

In contrast, the scenario in Fig. 5A, with global warming peaking just over 1 °C and then declining slowly, should allow summer sea ice to survive and then gradually increase to levels representative of recent decadeIn contrast, the scenario in Fig. 5A, with global warming peaking just over 1 °C and then declining slowly, should allow summer sea ice to survive and then gradually increase to levels representative of recent decadein Fig. 5A, with global warming peaking just over 1 °C and then declining slowly, should allow summer sea ice to survive and then gradually increase to levels representative of recent decades.

Acidity decline in Antarctic ice cores during the Little Ice Age linked to changes in atmospheric nitrate and sea salt concentratioice cores during the Little Ice Age linked to changes in atmospheric nitrate and sea salt concentratioIce Age linked to changes in atmospheric nitrate and sea salt concentrations.

Locally, declining sea ice is affecting the feeding and migration patterns of polar bears, whales, walrus and seals, and the people who live in the Arctic and rely on seasonal ice for their livelihoods.