Sentences with phrase «measuring ice thickness»

However, they're not measuring ice thickness but ice draft, the amount of ice below the water line.

And for years nuclear submarines (Russian, American and British) have been measuring ice thickness from the bottom, using their sonar.

We find out that the weather's so cold, that it certainly isn't the air temperature that's melting any ice and that the USN has had automated bouys measuring the ice thickness, bobbing away for years.

Scientists also face shortfalls in other satellite functions that they need for monitoring the Antarctic ice: high - frequency radar for measuring the speed of glaciers and low - frequency radar for measuring ice thickness.

The study uses data from two NASA missions — Operation IceBridge, which measures ice thickness and gravity from aircraft, and Oceans Melting Greenland, or OMG, which uses sonar and gravity instruments to map the shape and depth of the seafloor close to the ice front.

And the sonar systems on Los Angelos class fast attack submarines, like the one I went under the ice on, that could measure ice thickness, were of the active variety, projecting sound and listening to the echos, and were rarely, if ever used up there.

IceBridge data are collected from aircraft that fly over the ice cover carrying a suite of instruments, including altimeters that can directly measure ice thickness above the surface.

However, the satellite never measured ice thickness.

In 1999, a second transit using US submarines measured ice thickness.

The agency's six - year Operation IceBridge mission conducts flights over the Arctic to measure ice thickness using laser instruments.

However, Radic notes that less than 1 percent of glaciers in the world have measured ice thicknesses, so it's hard to validate the study's estimates.

The team, including Dr Seymour Laxon and Andy Ridout, was the first to measure ice thickness throughout the Arctic winter, from October to March, over more than half of the Arctic.

Not exact matches

The cores, some as long as 100 - feet, were transported to Dartmouth where the research team used a light table to measure the thickness and frequency of the ice layers.

Last week, Thompson's colleagues measured the ice levels at survey poles that they had inserted last year; more than a meter of ice had melted in 12 months, out of a total thickness of 20 to 50 meters.

The thickness of the ice, and its overall volume, may be a more important measure of what is happening in the Arctic over the long term, even though it is not as simple to measure, said Overland.

«We needed measurements from an airplane to measure the thickness of the ice.

Although CryoSat - 2 is designed to measure changes in the ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and sea floor geometry and the Archimedes principle of buoyancy — which relates the thickness of floating ice to the height of its surface.

Researchers from Norway and China have collaborated on developing an autonomous buoy with instruments that can more precisely measure the optical properties of Arctic sea ice while also taking measurements of ice thickness and temperature.

In addition to the thickness of the snow cover on top of the sea ice, the buoys also measure the air temperature and air pressure.

It will use ice - penetrating radar to measure the thickness of the moon's ice shell, map its internal rifts and faults (clues to the tempo of its geologic activity) and locate pockets of water near the surface.

Ingeniously beating swords into ploughshares, Australian scientists have adapted an ageing British torpedo to measure the thickness of the Antarctic ice shelf as it zips along under the ice.

CryoSat - 2 carries a radar altimeter optimized to measure the extent and thickness of polar ice.

Barents» group measured the cold by the thickness of the ice inside the house walls — it reached a maximum of 5 centimetres.

At the moment, the only way to measure the thickness of sea ice is to drill hundreds of ice cores.

In May it approved the Jupiter Icy Moons Explorer, a probe slated for launch in 2022 that will measure the thickness of Europa's ice shell.

For their work Maksym and co-investigators Guy Williams from the University of Hobart, Tasmania and Jeremy Wilkinson of the British Antarctic Survey in Cambridge, UK, used a robot known as an autonomous underwater vehicle (AUV) to cruise under ice in three regions near the coast and measure the thickness directly over a much larger area.

Haas and his team, including Stephen Howell of Environment Canada, measured first - year and multiyear ice thickness in the Canadian Arctic Archipelago using an airplane equipped with an electromagnetic induction sounder or EM bird.

New way of measuring sea ice thickness could help assess how sea ice is affected by climate change

By measuring the thickness of the ice laid down each year, the researchers estimated annual snow accumulation for the past 300 years.

One example offered in their paper is typical: On Oct 3, 2015, an NSF / NCAR research aircraft took off from southern Chile and flew south to measure the thickness of the Antarctic ice shelf.

ICESat - 2 will add to our understanding of Arctic sea ice by measuring sea ice thickness from space, providing scientists more complete information about the volume of sea ice in the Arctic and Southern oceans.

«He has pioneered the use of AUVs (autonomous underwater vehicles) to measure under - ice topography and has worked with the Royal Navy since the 1970s in carrying out ice thickness measurement work from Navy submarines on Arctic deployments.»

The motivation for this time series is to visualize the fact that the long term Arctic - wide loss of sea ice is not only happening in extent, which is well measured by satellites, but also in thickness, which isn't.

We see another intrepid group, walking to the pole, «Tweeting» as they go, telling us they're measuring the thickness of the ice, whuic has never been done before.

In case this isn't already clear, there is simply no measure — neither thickness nor areal extent — by which Greenland can be said to have lost 15 % of its ice.

Ice volume, the product of sea ice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iIce volume, the product of sea ice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iice area and thickness, is a measure for the total loss in sea ice and the total amount of energy involved in melting the iice and the total amount of energy involved in melting the iceice.

... the confusion came most likely from a confusion in definitions of what is the permanent ice sheet, and what are glaciers, with the «glaciers» being either dropped from the Atlas entirely or colored brown (instead of white)... there is simply no measure — neither thickness nor areal extent — by which Greenland can be said to have lost 15 % of its ice.

Try ice thickness as measured by submarine, note the non linear time axis.

Sea ice thickness is also being measured since 2004 and there has been a dramatic decrease in thickness according to NASA's press release, NASA Satellite Reveals Dramatic Arctic Ice Thinning dated July, 20ice thickness is also being measured since 2004 and there has been a dramatic decrease in thickness according to NASA's press release, NASA Satellite Reveals Dramatic Arctic Ice Thinning dated July, 20Ice Thinning dated July, 2009.

There is no other reliable method to measure the thickness of snow than to step on the ice and use poles like Marc did.

The team, which Marc led and provided the logistical support for, deployed from Resolute to Nord Greenland before setting up a rustic field camp on the sea ice for six days, during which time we mechanically drilled the ice to measure thickness, measuring snow depth in a grid pattern along the flight lines as well as dragging instruments along the surface that produced the same measurements for comparison to the airborne data.

If you oversimplify things, the most accurate measurement of snow and ice thickness is done by being there — on the ice — drilling a hole and directly measuring it.

It can also be measured in thickness, and the two measures can be combined to calculate the overall volume of ice.

There are two ways to categorize the amount of ice: by measuring the extent (essentially the area of the ocean covered by ice, though in detail it's a little more complicated) or using volume, which includes the thickness of the ice.

According to the second study, which measured changes in the thickness and height of ice using radar and laser altimetry instruments flown as part of NASA's Operation IceBridge campaign, the glacier lost between 984 and 1,607 feet in thickness from 2002 to 2009.

Although CryoSat - 2 is designed to measure changes in the ice sheet elevation, these can be translated into horizontal motion at the grounding line using knowledge of the glacier and sea floor geometry and the Archimedes principle of buoyancy — which relates the thickness of floating ice to the height of its surface.

Since North Cascade glaciers rarely have ice lenses, an indicator of little internal accumulation, probing is an accurate method of measuring accumulation layer thickness.

The scientists have measured average sea ice thickness to less than a meter in the area, and observed a late start of the freeze up period.

In addition, Sentinel - 3B will as well measure sea ice thickness and significant wave heights, the latter will be assimilated into MET Norway's wave forecast model, also a contribution to the Copernicus Marine Services.

Peter Wadhams, President of the International Association on Sea Ice and Head of the Polar Ocean Physics Group / Department of Applied Mathematics and Theoretical Physics, University of Cambridge, says: «It is quite urgent that we recognize what is going on... the ice has been getting thinner over the last 40 years since I have been measuring it, and it has lost about one - half of its thickness... five years ago the shrinkage started to acceleraIce and Head of the Polar Ocean Physics Group / Department of Applied Mathematics and Theoretical Physics, University of Cambridge, says: «It is quite urgent that we recognize what is going on... the ice has been getting thinner over the last 40 years since I have been measuring it, and it has lost about one - half of its thickness... five years ago the shrinkage started to acceleraice has been getting thinner over the last 40 years since I have been measuring it, and it has lost about one - half of its thickness... five years ago the shrinkage started to accelerate.