Sentences with phrase «ocean ice cover»

The Arctic regions are losing permafrost and Arctic Ocean ice cover.

The Arctic regions are losing permafrost and Arctic ocean ice cover.

We present our best estimate of the thickness and volume of the Arctic Ocean ice cover from 10 Ice, Cloud, and land Elevation Satellite (ICESat) campaigns that span a 5 - year period between 2003 and 2008.

Factors contributing to the accelerating erosion appear to be a combination of warmer air temperatures and reduced summer ocean ice cover.

Combined with a large decline in MY ice coverage over this short record, there is a reversal in the volumetric and areal contributions of the two ice types to the total volume and area of the Arctic Ocean ice cover.

Not exact matches

Telescopes spied water in ice caps at the Red Planet's poles, as well as signs of an ancient ocean covering the northern hemisphere.

Researchers have previously suggested that extreme weather in the midlatitudes might be linked to climate change's impacts on the Arctic (SN Online: 12/2/11), particularly the dramatically decreased sea ice cover in the Arctic Ocean.

Europa, meanwhile, appears to be entirely covered by an ocean, sandwiched between a rocky core and a thin ice crust.

Such conditions, probably a rarity more than two decades ago, now extend to roughly 30 percent of the ice - covered Arctic Ocean during July, researchers report March 29 in Science Advances.

He set out to explore whether a layer of ice covering early Earth's oceans might have gathered and assembled organic molecules.

So as soon as the hail of asteroids stopped, Earth may have cooled to an average surface temperature of — 40 °F and a crust of ice as much as 1,000 feet thick may have covered the oceans.

Scientists have suggested that ice sheets covering the ocean, or a hydrogen - sulfide haze, might have protected nascent life, but attempts to model these conditions have given ambiguous results.

But we also thought that this did not apply to ocean areas covered by ice, because the ice was considered impenetrable.

If the planet is covered by an immense amount of water, the pressure at the bottom of the ocean will increase to such an extent that water occurs in the form of «Ice VII,» which does not exist on Earth.

Sandy ocean sediment is associated with ice cover, and when you find it somewhere far from the ice edge, you know that at some point the ice reached that site.

From 500 feet up everything appeared in miniature except the giant ice shelves — seemingly endless expanses of ice, as thick as the length of several football fields, that float in the Southern Ocean, fringing the ice sheets that virtually cover the Antarctic landmass.

For now, the second - highest priority mission on NASA's wish list is the Jupiter Europa Orbiter, which would survey the ice - covered moon Europa and the global ocean that seems to lie beneath its frozen surface.

At the time, 2 km thick ice - cover loaded what now is the ocean floor with heavy weight.

The Antarctic ice sheet, the thick layer of ice covering much of the continent, is anchored in place by its floating fringe, shelves of ice that jut out into the surrounding ocean.

Also, the ice cover on the Arctic Ocean has grown thinner and the amount and expanse of perennial ice has decreased.

(The Arctic ice around the North Pole, on the other hand, is mostly covering ocean.)

«This highly unusual state of the atmosphere has been linked to record low sea ice cover during summer over the Arctic Ocean.

«We were also able to verify that sea ice cover does indeed impede ocean swell from reaching the coastline by showing which regions of sea ice impact the intensity of microseisms.

Subglacial lakes provide earthly analogs of ice - covered oceans deep beneath the surface of moons orbiting Jupiter and Saturn.

A second factor, and one supported by the latest report from the Intergovernmental Panel on Climate Change (IPCC), points to the melting of the ice - covered terrain of Greenland and Antarctic as well as the thermal expansion of ocean waters.

«When you remove sea ice cover, you remove insulation, so all the ocean heat can be released into the atmosphere above,» Serreze said.

Over 25 years, the proportion of the ocean covered by ice at least four years old has dwindled from 26 % to 7 %, while the remaining ice is mainly thin, the product of one winter.

With eruptions of ice and water vapor, and an ocean covered by an ice shell, Saturn's moon Enceladus is one of the most fascinating in the Solar System, especially as interpretations of data provided by the Cassini spacecraft have been contradictory until now.

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 other six, which may be covered in ice or oceans, may have more life - friendly atmospheres.

But now the discovery of animals in an isolated, ice - covered nook of the ocean seems to have jarred people's thoughts into a new space.

On the outside they are covered by a thick layer of ice, and underneath this there is an ocean surrounding a rocky core.

The volume of ice divergence has doubled since 2000 due to a more mobile ice cover as multiyear ice has declined, which can explain the drastic ice reduction in the Arctic Ocean in recent years.

Ice - covered sea areas in the Arctic Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice zoIce - covered sea areas in the Arctic Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice Ocean during summer have nearly halved since the 1970s and 1980s, raising alarm that the ocean is shifting from a multiyear to a seasonal ice ocean is shifting from a multiyear to a seasonal ice zoice zone.

Total sea ice cover on the Arctic Ocean peaked on March 7, satellite observations show, reaching a total area of 14.42 million square kilometers.

The area covered by all the green leaves on Earth is equal to, on average, 32 percent of Earth's total surface area — oceans, lands and permanent ice sheets combined.

Sea ice physicists from the Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research (AWI), are anticipating that the sea ice cover in the Arctic Ocean this summer may shrink to the record low of 2012.

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.

Over the past few years, the ice on the Arctic Ocean in late summer — covers less area than it did 30 years ago; declined but then recovered to about the same area it had 30 years ago; or covers more area than it did 30 years ago.

However, up until now the radar's «eyes» have been blind where the oceans are covered by ice.

Cracks cover the moon's crust, which suggests it has cycled material from deeper inside, so the carbon - rich debris may have been incorporated into the ice and made it into the ocean, says Bottke.

Arctic sea ice cover, made of frozen seawater that floats on top of the ocean, helps regulate the planet's temperature by reflecting solar energy back to space.

But changes in sea level and ocean currents in the ice - covered regions of the Arctic and Antarctic in particular are very difficult to detect.

We would think that if an ice sheet covered the oceans it would have had an impact on marine production or photosynthesis and we find no carbon isotopic evidence for this.

«Thanks to the sediment core data, we have clear evidence that, during the last interglacial roughly 125,000 years ago, the central Arctic Ocean was still covered with sea ice during the summer.

Nearly 30 percent of ice covering the Arctic Ocean at summer's peak is thin enough to foster sprawling phytoplankton blooms in the waters below, a recent study estimated.

The local diversity and unique geologic history (covered by neither glaciers nor oceans for the past 225 million years, the Ozarks provided refuge for migrating species during the Ice Age) explain the richness of the lichens here: some 600 named species, along with 30 recently discovered ones awaiting their official designation.

A hunger for iron rules the microscopic sea life of the Southern Ocean surrounding ice - covered Antarctica.

The area of the Arctic Ocean covered by sea ice usually hits its winter peak in early to mid-March, as the freeze season ends with the re-emergence of the sun above the horizon.

Tentatively slated for a 2022 launch, the probe will orbit Jupiter and make about 45 passes by the giant planet's moon Europa, which has a global ocean just beneath its ice - covered surface.