Sentences with phrase «from polar ice»

«Significant loss of ice from polar ice sheets» Of course, this does not apply to floating ice (with the exception of small changes due to higher temperature and water expansion that might happen incidentally).

A contributor to the famous «hockey stick graph», he specialises in mining historic climate data from polar ice cores.

There is important research that attempts to tie global warming to carbon dioxide emissions and a long list of supporting research and observations from polar ice melting and polar bears to strength and number of exceptional storms.

Climate forcings due to past changes in GHGs and surface albedo can be computed for the past 800000 years using data from polar ice cores and ocean sediment cores.

Past changes in atmospheric greenhouse gas concentrations can be determined with very high confidence from polar ice cores.

The latitudes used for the SST anomalies in this illustration are 20N - 65N, which are latitudes that have little impact from polar ice.

Thus, the concept of increasing CO2 is causing increasing sea level rise from polar ice melt embodies two assumptions that need to be established with physical evidence: 1) the extent to which increased CO2 will cause increased temperatures, assumptions or models do not suffice; and 2) the extent to which increased temperatures will cause Antarctic ice melt.

Has anyone yet talked up designing a Mars lander that would be able to drill a core from the polar ice cap, scan it and give us another data set?

The lower trend found by our study is consistent with the median projected sums of thermal expansion and glacier mass loss, implying that no net contribution from polar ice sheets is needed over 1901 - 1990.

The British photographer manages to cover all seven continents, from polar ice under an icy - white sky to tropical waters bathed in light.

This reflection was similar to that seen from the polar ice caps of Mars and the ice - covered moons of Jupiter.

Professor Mark Williams said: «The range of environments we are working with is remarkable — from polar ice and snow layers to deep lake and sea floors to the skeletons of reef corals and stalactites in caves.

Not exact matches

(Shackleton abandoned several unopened crates of this Scotch at his Antarctic base camp in 1909, and they were miraculously recovered from under the polar ice 98 years later, in 2007.

But when tree rings, pollen counts in polar ice, and temperature records from multiple places around the world all point in the same direction, we become increasingly confident that global warming is a reality.

In nature, changes of environmental conditions arise from such sources as the melting of polar ice - caps, explosion of dwarf stars, the fall of night.

False assumptions on starvation «Unless you've been living under a rock the last few decades, you're aware that Arctic Sea ice is melting, and that this is potentially bad news for polar bears,» she said, adding that until now, the prevailing belief has been that «energy from food on land is largely inconsequential.»

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.

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.

The researchers identified several key circulation patterns that affected the winter temperatures from 1979 to 2013, particularly the Arctic Oscillation (a climate pattern that circulates around the Arctic Ocean and tends to confine colder air to the polar latitudes) and a second pattern they call Warm Arctic and Cold Eurasia (WACE), which they found correlates to sea ice loss as well as to particularly strong winters.

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

The data to assess sea - ice coverage come from polar - orbiting satellites carrying passive - microwave sensors that can see through clouds.

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 Eurasia.

But when Lavigne's team examined shards of volcanic glass from this volcano, they found that they didn't match the chemical composition of the glass found in polar ice cores, whereas the Samalas glass is a much closer match.

«With most [species], we can identify a localized threat, but the threat to the polar bear comes from global influences on sea ice.»

In August 1596, a ship from an expedition seeking a polar passage to the Far East lodged in ice off the northeastern coast of Novaya Zemlya, an island north of Russia.

If it happened in the last 100,000 years, it might be possible someday to extract traces of its effects from deep within the polar ice caps.

Geysers of vapor — a couple of hundred kilometers tall and possibly erupting at supersonic speeds — occasionally spew from the south polar regions of Europa, one of Jupiter's ice - covered moons, a new study suggests.

The research team found the evidence confirming the stability of the East Antarctic ice sheet at an altitude of 6,200 feet, about 400 miles from the South Pole at the edge of what's called the polar plateau, a flat, high surface of the ice sheet covering much of East Antarctica.

A series of robotic missions, from Viking in the 1970s to the Spirit rover still roaming Mars today, have observed ancient riverbeds and polar ice caps storing enough water to submerge the entire planet in an ocean 40 feet deep.

Although scientists have analysed gases from tiny bubbles trapped in ice cores drilled in polar ice caps, there are doubts about how closely the composition of the bubbles matches that of the atmosphere at the time they were trapped (see New Scientist, Science, 22 August).

Reviews range from simple comments such as «this is a good piece of science journalism» to detailed scientific explanations such as how «polar ice cap» fails to distinguish between land ice and sea ice.

Black carbon warms the atmosphere because of its ability to absorb radiation from the sun, but its effect can be especially pernicious in polar regions, where, falling on bright ice, the soot diminishes the regions» ability to reflect away heat.

Researchers worry that the polar bears, which are already in trouble due to retreating Arctic ice, could suffer from lack of access to prime food sources.

Rising polar temperatures caused the average thickness of winter Arctic sea ice to decrease from about 12 feet to 6 feet between 1978 and 2008, and thinner ice melts more readily.

A spent rocket stage that NASA sent hurtling into the moon last year in hopes of kicking up water from a polar crater delivered on that mission, revealing that at least a moderate portion of its target was indeed made of ice.

(This status allowed the Administration to create a special rule exempting greenhouse gas emissions — which are, through global warming, melting the artic sea ice used by the polar bears for hunting — from regulation under the Endangered Species Act.)

Because Kaktovik's polar bears seem especially susceptible to the Arctic's shrinking sea ice, researchers are concerned they may start relying more heavily on nutrient - poor food from land.

Suck up near - freezing water from under the ice and pump it directly onto the ice's surface during the long polar winter.

As their hunting behavior shifts from ice to land, the polar bears «have progressively arrived earlier and earlier to have access to more eggs,» says biologist Børge Moe, another principal author of the study who works at the Norwegian Institute for Nature Research in Kongsfjorden, where seabird egg predation is just beginning to increase.

After downloading a few files from his site and depositing them in my Celestia folder, I found myself staring at a blue planet, cloud formations swirling across its surface, its vast oceans punctuated with landmasses and polar ice caps.

We land bouncily, overshoot the runway (built, the story goes, by robots from previous unmanned missions), and nearly plummet into a deep rift near the north polar ice cap.

The IPCC has taken a crack at that, identifying 26 «key vulnerabilities» in its most recent assessment, ranging from declines in agricultural productivity to the melting of ice sheets and polar ice cover as well as determining how to judge if they are spiraling out of control.

Because of the warming, «there are some potentially catastrophic events that must be considered,» including sea level rise from melting polar ice sheets, according to the document.

Analyses of images from the New Horizon mission and modelling of the evolution of the ice cap help to explain how this polar feature was formed.

If these polar continents lose a mile or more of ice from their land surface, there will be less mass, and so some of the water now attracted to those polar land masses will dissipate, and go elsewhere.

Shipp, S.S., Wellner, J.S., and Anderson, J.B., Retreat significance of a polar ice stream: sub-glacial geomorphic features and sediments from the Ross Sea, Antarctica: J.A. Dowdeswell and C. O'Cofaigh (eds.)

The Arctic Ocean's sea ice and waters are habitat for many imperiled species, from polar bears to bowhead whales — and they all face the threat of dirty fossil - fuel development.

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 ice also provides crucial coastal protection in the Arctic, hunting grounds for local tribes, and habitats for creatures from polar bears to seals.

Mitrovica, J. X., Tamisiea, M. E., Davis, J. L. & Milne, G. A. Recent mass balance of polar ice sheets inferred from patterns of global sea - level change.