Sentences with phrase «sea ice time»

Because of the limitations of near - real - time data, they should be used with caution when seeking to extend a sea ice time series, and should not be used for operational purposes such as navigation.

Come with me to the sea ice some time, or simply to the University of Alaska, Fairbanks, or an Arcus meeting, and let me introduce you to 20 or 30 scientists working incredibly hard to clarify that Arctic Ocean pixel point in the climate picture.

See the Winton 2011 reference for an attempt to assess whether or not the observed sea ice time series fits with expected declines from the coupled models.

The net, developed by AWI's Dutch partner IMARES, is about the size of a car and designed so that its large frame quickly sinks beneath the sea ice every time it's cast.

Not exact matches

In March 2017, sea ice around the North and South Poles reached record lows for that time of year.

Further, the less time an ice sheet has to create new layers of ice each winter, the less strong ice is created and built into centuries of previous strong sea ice, leaving ever more vulnerable and easy - to - melt sea ice.

Lavender Sea Salt Shortbread Cookies with Grapefruit Icing are classically simple, fragrant treats that you will want to make time and time again.

Because the martian air pressure is very low — 100 times lower than at sea level on Earth — ice on Mars does not melt and become liquid when it warms up.

The Arctic now has seven times less old sea ice than it did 30 years ago.

But is it a secret that satellites and ground observations show a meltdown in Arctic sea ice that will open new shipping lanes — and security concerns — for the first time in recorded history?

At this time of the year, the Weddell Sea usually is covered with a thick layer of sea iSea usually is covered with a thick layer of sea isea ice.

The team found that species of foraminifera living on the sea floor around the time of the ice age contained more carbon than those that floated at the surface (Science, DOI: 10.1126 / science.1188605).

As glaciologist Richard Alley of Pennsylvania State University notes: «The ice sheet is losing mass, this loss has increased over time, [and] it is not the dominant term in sea - level rise — but it matters.»

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.

The risk is real: we know that the West Antarctic ice sheet has collapsed many times in the past, raising sea levels at least 3 metres.

«We are in awe that an animal that spends most of its time on the surface of sea ice could swim constantly for so long in water so cold.»

«The full sea - level rise would ultimately be up to 80 times bigger than the initial melting of the ice cork,» says co-author Anders Levermann.

NUI took its first dip in the Arctic in July, exploring the under — sea ice environment and relaying environmental data and video back to its operators in real time.

These big ice sheets have frozen and melted many times in the past (producing ice ages with low sea levels and warm periods with high sea levels).

«At 1.5 degrees Celsius, half of the time we stay within our current summer sea ice regime whereas if we reach 2 degrees of warming, the summer sea ice area will always be below what we have experienced in recent decades.»

During that time, temperatures were less than 1 °C warmer than they are today, but sea level stood about 5 to 9 meters higher due to large - scale ice sheet melt.

Pettersen is hopeful that, with more data analysis over longer periods of time, researchers will find more answers yet to account for the melting ice sheet and the subsequent sea level rise that has already had an impact on regions across the planet.

«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.

This marks the first time that Norwegian and Chinese researchers have collaborated on a project to study Arctic sea ice and snow cover.

«The unmanned SRB buoy we built made it possible for the first time to generate continuous data on albedo and other properties of sea ice over a long period,» says Dr Gerland.

Interior Secretary Dirk Kempthorne, however, made clear several times during a press conference announcing the department's decision that, despite his acknowledgement that the polar bear's sea ice habitat is melting due to global warming, the ESA will not be used as a tool for trying to regulate the greenhouse gas emissions blamed for creating climate change.

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.

«If there were a link, it would be more likely to occur in fall [when the Arctic sea ice is at a low and the region is warm] than it would in January [when the Arctic is ice - covered and cold], so from that point of view, it's not a compelling candidate at this time of year,» Hoerling said.

Melting can be rapid: as the last ice age ended, the disappearance of the ice sheet covering North America increased sea level by more than a metre per century at times.

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

The summer minimum Arctic sea ice extent has decreased by 40 percent during the same time period.

Time - lapse visualizations of temperature, precipitation, receding sea ice, and collapsing ice shelves create a vivid experience of the natural pulses of the planet and the shifts brought on by climate change.

At the same time, there is considerable public interest in dependable predictions concerning Arctic sea ice development over the next few decades, so as to have a basis for long - term strategic planning.

Hawkings and his collaborators spent three months in 2012 and 2013 gathering water samples and measuring the flow of water from the 600 - square - kilometer (230 - square - mile) Leverett Glacier and the smaller, 36 - square - kilometer (14 - square - mile) Kiattuut Sermiat Glacier in Greenland as part of a Natural Environment Research Council - funded project to understand how much phosphorus, in various forms, was escaping from the ice sheet over time and draining into the sea.

If the East Antarctic ice sheet, which is 10 times larger than the western ice sheet, melted completely, it would cause sea levels worldwide to rise almost 200 feet, according to Kathy Licht, an associate professor in the Department of Earth Sciences in the School of Science at IUPUI.

You know, a new ocean is being created for the first time since the Ice Age [in the Arctic with the meltdown of sea icIce Age [in the Arctic with the meltdown of sea iceice].

«Sea ice is critical for Arctic marine mammals because events such as feeding, giving birth, molting, and resting are closely timed with the availability of their ice platform,» Laidre said.

The sea ice reached its maximum winter extent unusually early this year and has been falling fast, to a new record low for this time of year (see graph below).

The recent string of record - low winter maximums could be a sign that the large summer losses are starting to show up more in other seasons, with an increasingly delayed fall freeze - up that leaves less time for sea ice to accumulate in winter, Julienne Stroeve, an NSIDC scientist and University College London professor, previously said.

«However, we know that sea level fluctuated even during times when there were no ice sheets on Earth.

«Later, the sea ice gradually expanded from the very high Arctic before reaching, for the first time, what we now see as the boundary of the winter ice around 2.6 million years ago,» says Jochen Knies, who is also attached to CAGE, the Centre for Arctic Gas Hydrate, Environment and Climate at the University of Tromsø, the Arctic University of Norway.

A graph showing global sea ice levels hitting unprecedented lows for this time of year has caused a social media storm.

When the planet's big ice sheets collapsed at the end of the last ice age, their melting caused global sea levels to rise as much as 100 meters in roughly 10,000 years, which is fast in geological time, Mann noted.

Climate Cruise Arctic sea ice vanished from the Northwest Passage this summer, letting the cruise ship Crystal Serenity take about 1,000 tourists from Alaska to New York for the first time.

At this time of year, sea ice should be growing rapidly as winter sets in.

Antarctic sea ice extent reached a record high this year on 22 September, topping 20 million square kilometers for the first time since 1979, according to the National Snow and Ice Data Centice extent reached a record high this year on 22 September, topping 20 million square kilometers for the first time since 1979, according to the National Snow and Ice Data CentIce Data Center.

As a result of atmospheric patterns that both warmed the air and reduced cloud cover as well as increased residual heat in newly exposed ocean waters, such melting helped open the fabled Northwest Passage for the first time [see photo] this summer and presaged tough times for polar bears and other Arctic animals that rely on sea ice to survive, according to the U.S. Geological Survey.

The study marks the first time that human influence on the climate has been demonstrated in the water cycle, and outside the bounds of typical physical responses such as warming deep ocean and sea surface temperatures or diminishing sea ice and snow cover extent.

Though technically considered a temperate species, the whales are spending more time in Arctic waters each summer because there is more plankton and a longer period without sea ice.

«The influence of rising oceans is even greater than the overall amount of sea level rise because of storm surge, erosion and inundation,» said Carlson, who studies the interaction of ice sheets, oceans and the climate system on centennial time scales.