Sentences with phrase «sea ice cover for»

These new sea ice proxy records are needed (1) to fully prove the scenarios of a succession from an extended ice shelf to polynya / open - water conditions (cf., Fig. 6), (2) to reconstruct in more detail the changes in sea ice cover for early, middle and late LIG intervals characterized by very different external forcings and related internal feedback mechanisms, and (3) to allow a more fundamental proxy data / modeling comparison that results in model improvements and better reproduction of the LIG climatic evolution and prediction of future climatic scenarios20, 21,22,23, 64.

Scientists have used satellite data to measure sea ice cover for 35 years.

your evidence for Arctic ice concentration similar in extent or lower than current is 1) your personal experience 2) a 1952 ecyclopedia entry describing changing sea ice cover for one region of the Arctic.

According to an analysis by the National Snow and Ice Data Center based on data from NOAA and NASA, sea ice cover was below average for most regions of the Arctic with near - average sea ice cover for part of the Laptev Sea.

Not exact matches

Rising temperatures have reduced the area's sea ice cover, which serves as an important habitat not just for Adelie penguins but also for krill.

«Polar regions have been changing very rapidly, providing data for our projections on sea ice, snow cover, ice sheets and sea level rise,» says David Vaughan of the British Antarctic Survey in Cambridge, UK, the lead author of the cryosphere chapter.

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.

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 20Sea 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 20sea ice cover in the Arctic Ocean this summer may shrink to the record low of 2012.

Arctic sea ice cover grows each winter as the sun sets for several months, and shrinks each summer as the sun rises higher in the northern sky.

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.

«Yet our biomarker data show acceptable living conditions for phytoplankton and sea ice algae, namely open waters and seasonal ice cover — a wide difference to kilometre - thick ice,» says Rüdiger Stein.

Even models that correctly capture cloud behavior may fail to fully account for other climate feedbacks from factors like changing snow and sea ice cover, atmospheric water vapor content, and temperature.

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

«We expressed a need for something that could provide more immediate and local observation that could be launched easily and cover enough distance to conduct reconnaissance on potential routes through drifting sea ice,» says Cyrus Unvala, a lieutenant, junior grade, who served as public affairs officer onboard the Polar Star.

The scientists theorize that a warming Arctic environment has reduced sea ice cover, allowing for more wave action that stirs up sediments and mobilizes more radium.

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.

And, as Walt Meier of NASA's Goddard Space Flight Center noted here, Antarctic sea ice already covers a huge area — it doesn't take much growth for it to set a new record.

«While more research should be done, we should be aware that an increasing number of studies, including this one, suggest that the loss of Arctic sea ice cover is not only a problem for remote Arctic communities, but could affect millions of people worldwide.»

«Reduced sea ice cover over a longer period of time over the summer could mean improved foraging for belugas,» said Hauser, who is also a researcher at the University of Alaska Fairbanks.

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

Recruitment is related to the winter sea ice cover from the previous year, as diminished sea ice cover reduces habitat available for over-wintering juvenile and adult krill and reduces the size of the food - rich marginal sea ice zone in summer.

The overall Arctic sea ice cover during June averaged 4.09 million square miles, the lowest in the satellite record for the month, according to the NSIDC.

A number of recent studies linking changes in the North Atlantic ocean circulation to sea ice extent led Yeager to think that it would also be possible to make decadal predictions for Arctic winter sea ice cover using the NCAR - based Community Earth System Model...

According to the latest Piomas data, a combination of the smallest sea ice extent and the second - thinnest ice cover on record puts total volume of sea ice in November 2016 at a record low for this time of year.

Twenty - sixteen also brought forth record - low average Arctic sea ice for much of the year, and the second lowest minimum sea ice cover reported.

Arctic sea ice extent was below normal for the 11th consecutive April this year, covering an average of 5.7 million square miles (14.7 million square kilometers) 2.1 percent below the 1979 - 2000 average extent and the 15th smallest April extent since records began in 1979.

The area of sea ice covering the Arctic ocean even stopped growing and started shrinking in the Barents Sea for a brief period in Novembsea ice covering the Arctic ocean even stopped growing and started shrinking in the Barents Sea for a brief period in NovembSea for a brief period in November.

sea ice covering the Arctic ocean even stopped growing and started shrinking in the Barents Sea for a brief period in Novembsea ice covering the Arctic ocean even stopped growing and started shrinking in the Barents Sea for a brief period in NovembSea for a brief period in November.

Join us for a unique expedition, a voyage into an ocean at the end of the world, cruise through the western and northern regions of this vast glaciated archipelago and discover snow covered mountains and glaciers, stark tundra, sea stacks and ice cliffs.

On the upper deck there is large partially covered area for enjoying a morning sea breeze or an ice cold beer in the evening.

As expected, the Arctic Ocean remains ice - free for several months, and significant sea - ice cover does not develop before November.

The first is to emphasize your point that degassing of CO2 from the oceans is not simply a matter of warmer water reducing CO2 solubility, and that important additional factors include changes in wind patterns, reduction in sea ice cover to reveal a larger surface for gas escape, and upwelling of CO2 from depths consequent to the changing climate patterns.

According to Seager et al. (2002) THC appears to account for the North America vs. Europe winter temperature difference only in the highest latitudes, north of about 60 degrees N, due to the fact that the heat transport limits sea ice cover there.

While methane is short - lived, all it has to do is shift the global energy balance for a while, to trigger irreversible loss of tundra methane, loss of Arctic sea ice cover and more calthrate loss, then loss of ice sheets and everything else Hansen et al promise.

If the heat transport by the Atlantic thermohaline circulation suddenly increases for some reason (we'll come to that), Greenland suddenly gets warm (an effect amplified by receding sea ice cover of the seas near Greenland) and Antarctica starts to cool.

This is perhaps the least newsworthy item for readers here, given how much The Times has covered the mix of issues arising as summer sea ice retreats in the Arctic and pressures grow to exploit new shipping routes and northern resources.

However, I've never seen a single media article in any U.S. press outlet that covered these issues — the large - scale evidence for global warming (melting glaciers, warming poles, shrinking sea ice, ocean temperatures) to the local scale (more intense hurricanes, more intense precipitation, more frequent droughts and heat waves) while also discussing the real causes (fossil fuels and deforestation) and the real solutions (replacement of fossil fuels with renewables, limiting deforestation, and halting the use of fossil fuels, especially coal and oil.)

This study suggests that natural variability is a likely cause, with reduced sea ice cover being crucial for the warming.

(57j) For surface + tropospheric warming in general, there is (given a cold enough start) positive surface albedo feedback, that is concentrated at higher latitudes and in some seasons (though the temperature response to reduced summer sea ice cover tends to be realized more in winter when there is more heat that must be released before ice forms).

Updated, Nov. 25, 10:41 a.m. Ruth Teichroeb, the communications officer for Oceans North: Protecting Life in the Arctic, an initiative of the Pew Charitable Trusts, sent a note this evening about new steps related to an issue I've covered here before — the rare and welcome proactive work by Arctic nations to ban fishing in the central Arctic Ocean ahead of the «big melt» as summer sea ice retreats more in summers in a human - heated climate.

There are several things that are well proven and simple to understand — for example, global termperature increase, sea level rise, polar ice cover, glacier retreat, and snow cover.

As noted above, the recent warming «is seen in the oceans, the atmosphere, in Arctic sea ice retreat, in glacier recession, earlier springs, reduced snow cover etc.» Another «inconvenient truth» for denialists to avoid mentioning or acknowledging while overblowing the UHI issue.

The IPCC said:» Ice extent data from Russian sources have recently been published (Polyakov et al., 2003), and cover essentially the entire 20th century for the Russian coastal seas (Kara, Laptev, East Siberian and Chukchi).

The Arctic sea ice, for instance, has timescales of around 5 years to a decade, and so a collapse of summer ice cover could conceivably be reversed in a «cooling world» after only a decade or so (interactions with the Arctic ocean stratification may make that take a little longer though).

The continued heating of the seas and melting ice caps does not bode well for ice cover in the arctic.

Lastly, there is significant independent evidence for warming in the oceans, snow cover and sea ice extent changes.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

If all of the currently attainable carbon resources [estimated to be between 8500 and 13.600 GtC (4)-RSB- were burned, the Antarctic Ice Sheet would lose most of its mass, raising global sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the ice - covered area is depicted in white (ice - free bedrock in browIce Sheet would lose most of its mass, raising global sea level by more than 50 m. For the 125 GtC as well as the 500, 800, 2500, and 5000 GtC scenarios, the ice - covered area is depicted in white (ice - free bedrock in browice - covered area is depicted in white (ice - free bedrock in browice - free bedrock in brown).

Meanwhile the people predicting a return to the ice cover that existed since the Holocene maximum according to sea floor sediment cores have no physical process to account for their assertions of returning ice.

Satellite evidence for an Arctic sea ice cover in transformation.