Sentences with phrase «sea ice season in»

Satellite observations made from 1979 to 2016 show that the annual sea ice season in the greater Station Obama area has become 3 - 4 months shorter over the last 38 years.

Not exact matches

UAF has worked extensively with both institutional and commercial partners in Alaska and in recent years, using drones to monitor sea lion populations in the Aleutian Islands, conduct ice flow and environmental surveying missions for NASA and National Oceanic and Atmospheric Administration, inspect pipelines for oil and gas giant BP and assist a Russian tanker during a dangerous late - season fuel delivery to the remote Alaskan outpost of Nome.

Rising temperatures and receding sea ice have opened more of the Northwest Passage's interconnecting waterways in recent seasons.

Satellite data show that, between 1979 and 2013, the summer ice - free season expanded by an average of 5 to 10 weeks in 12 Arctic regions, with sea ice forming later in the fall and melting earlier in the spring.

It might seem counterintuitive to link Arctic sea ice that disappears in the summer to a colder winter in the northeastern U.S. and Europe, but scientists have reason to believe the connection is real and will make itself felt this upcoming season.

«This knowledge about how Arctic sea ice melts over the course of the summer season will be valuable in further research,» he says.

Data collected by ship and model simulations suggest that increased Pacific Winter Water (PWW), driven by circulation patterns and retreating sea ice in the summer season, is primarily responsible for this OA expansion, according to Di Qi, the paper's lead author and a doctoral student of Liqi Chen, the lead PI in China.

Starting next week, NASA's Operation IceBridge, an airborne survey of polar ice, will be carrying science flights over sea ice in the Arctic, to help validate satellite readings and provide insight into the impact of the summer melt season on land and sea ice.

In the case of Arctic whales, the changes in sea ice might benefit their populations, at least in the short term: the loss and earlier retreat of sea ice opens up new habitats and, in some areas of the Arctic, has also led to an increase in food production and the length of their feeding seasoIn the case of Arctic whales, the changes in sea ice might benefit their populations, at least in the short term: the loss and earlier retreat of sea ice opens up new habitats and, in some areas of the Arctic, has also led to an increase in food production and the length of their feeding seasoin sea ice might benefit their populations, at least in the short term: the loss and earlier retreat of sea ice opens up new habitats and, in some areas of the Arctic, has also led to an increase in food production and the length of their feeding seasoin the short term: the loss and earlier retreat of sea ice opens up new habitats and, in some areas of the Arctic, has also led to an increase in food production and the length of their feeding seasoin some areas of the Arctic, has also led to an increase in food production and the length of their feeding seasoin food production and the length of their feeding season.

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.

The sea ice fringing Antarctica also set a record low for its annual summer minimum (with the seasons opposite in the Southern Hemisphere), though this was in sharp contrast to the record highs racked up in recent years.

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.

Research led by Eric Post, a professor of biology at Penn State University, has linked an increasingly earlier plant growing season to the melting of arctic sea ice, a relationship that has consequences for offspring production by caribou in the area.

But this year, a big spring meltdown in October and November suddenly reversed that trend and has led to continued record low sea ice levels as the summer melt season progressed.

Climate change is pushing temperatures up most rapidly in the polar regions and left the extent of Arctic sea ice at 1.79 million square miles at the end of the summer melt season.

In the Antarctic, where the summer season just wrapped up, rapid ice melt led to the lowest sea ice minimum ever recorded for the area.

The sea ice that caps the Arctic Ocean naturally waxes and wanes with the seasons, reaching its maximum area at the end of winter, before the reemergence of the sun in spring starts off the melt season.

Meanwhile, in Antarctica, sea ice has already reached its minimum extent following the summer melt season.

This new group of scientists find some weather disturbances were not from the El Nino, La Nina cycle, but apparently regulated by conditions in the Arctic — things like low sea ice, low or shorter season snow cover, and even «sudden stratospheric warming».

This process should be independent of the season of the year and the fresher water flowing out on the surface may help to explain the increase in sea ice.

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The high anomalies up in the Arctic continue for a third month in GISTEMP and the question of the maximum Arctic Sea Ice Extent is surely now only by how much this freeze season will be below the record low set in 2017.

The lag between decreases in sea ice extent during late summer and changes in the mid-latitude atmospheric circulation during other seasons (when the recent loss of sea ice is much smaller) needs to be reconciled with theory.

Long term trends in all seasons are towards less Arctic sea ice.

The lag between decreases in sea ice extent during late summer and changes in the mid-latitude atmospheric circulation during other seasons (like autumn and winter, when the recent loss of sea ice is much smaller) have been demonstrated empirically, but have not been captured by existing dynamical models.

No one is predicting an end to sea ice in other seasons.

Even as the long - term trend in the Arctic is toward less sea ice in summers, for decades to come — and routinely in other seasons — any nation with interests in the far north will need to be able to navigate in heavy ice.

These include increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the ocean and on lakes and rivers, earlier snowmelt, and alterations in river flows.

Re # 49 & # 82 The limitations on the growth of algae in the arctic varies with the season, the effect of sea - ice melting is not as certain as Harold would have us believe: http://www.agu.org/pubs/crossref/2005/2005JC002922.shtml http://www.nurp.noaa.gov/Spotlight/ArcticIce.htm

(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).

It's tough enough to predict what Arctic sea ice will do in a particular season, but humans are orders of magnitude more unpredictable.

Among these physical changes are increases in heavy downpours, rising temperature and sea level, rapidly retreating glaciers, thawing permafrost, lengthening growing seasons, lengthening ice - free seasons in the oceans and on lakes and rivers, earlier snowmelt and alterations in river flows.

It is important to note that although the sea ice has changed greatly in the past few decades, it has changed much less during the polar breeding season.

ScienceDaily (Oct. 3, 2008)-- Arctic sea ice extent during the 2008 melt season dropped to the second - lowest level since satellite measurements began in 1979, reaching the lowest point in its annual cycle of melt and growth on Sept. 14, according to researchers at the University of Colorado at Boulder's National Snow and Ice Data Center.&raqice extent during the 2008 melt season dropped to the second - lowest level since satellite measurements began in 1979, reaching the lowest point in its annual cycle of melt and growth on Sept. 14, according to researchers at the University of Colorado at Boulder's National Snow and Ice Data Center.&raqIce Data Center.»

Some other sea ice scientists (Jennifer Francis at Rutgers and Ignatius Rigor at the University of Washington) told me they are not ready to call it a season, noting that atmospheric pressure and some other conditions over the basin could lead to further shrinkage of ice extent in the next week or so.

For much of the season, the sea ice was tracking close to long - term norms, though it had a precipitous decline in July, and is now almost two standard deviations away from the long - term average.

Abstract: «Comparison of sea - ice draft data acquired on submarine cruises between 1993 and 1997 with similar data acquired between 1958 and 1976 indicates that the mean ice draft at the end of the melt season has decreased by about 1.3 m in most of the deep water portion of the Arctic Ocean, from 3.1 m in 1958 — 1976 to 1.8 m in the 1990s...»

According to a study commissioned by Canada's National Energy Board and based on 20 years of Beaufort Sea data, three of the most widely - used oil spill containment methods — burning spilled oil in - situ, deploying booms and skimmers, and aerial application of dispersants — would be impossible due to bad weather or sea ice 20 - 84 percent of the brief, June - to - November open - water seasSea data, three of the most widely - used oil spill containment methods — burning spilled oil in - situ, deploying booms and skimmers, and aerial application of dispersants — would be impossible due to bad weather or sea ice 20 - 84 percent of the brief, June - to - November open - water seassea ice 20 - 84 percent of the brief, June - to - November open - water season.

A few stay on the ice all year round, but southerly populations survive ashore in the summer, and it is the seasonal winter feast upon seals and other sea mammals that gives them the nourishment to make it to the next breeding season.

Composite satellite measurements of sea surface temperature (SST) and real - color land and sea ice images for the end of the summer 2011 season in the Pacific Arctic.

While sea ice in the Arctic grows and shrinks with the seasons, there is an overall declining trend, as north pole has warmed roughly twice as fast as the global average.

This causes increased erosion due to permafrost melt, increased flooding due to the warmer temperatures, and intensified storms because the sea ice forms later in the season and is unable to provide a natural barrier for our coastal communities.

In both the Arctic and the Antarctic «natural causes» (the seasons) are responsible for the seasonal decrease / increase in sea ice extent, which are, of course, much larger than the average annual changIn both the Arctic and the Antarctic «natural causes» (the seasons) are responsible for the seasonal decrease / increase in sea ice extent, which are, of course, much larger than the average annual changin sea ice extent, which are, of course, much larger than the average annual change.

This warming means that the sea ice, which naturally increases and decreases during the winter and summer seasons, is sticking around for 100 fewer days per year than it did in 1978.

Recent changes in Arctic sea ice melt onset, freeze - up, and melt season length.

In fact, although climate models predict that Arctic sea ice will decline in response to greenhouse gas increases, the current pace of retreat at the end of the melt season is exceeding the models» forecasts by around a factor of 3 (Stroeve 2007In fact, although climate models predict that Arctic sea ice will decline in response to greenhouse gas increases, the current pace of retreat at the end of the melt season is exceeding the models» forecasts by around a factor of 3 (Stroeve 2007in response to greenhouse gas increases, the current pace of retreat at the end of the melt season is exceeding the models» forecasts by around a factor of 3 (Stroeve 2007).

With two to three more weeks left in the melt season, sea ice continues to track below 2007 daily extents.

Changes in Arctic melt season and implications for sea ice loss.

[17] Before the advent of satellite - based imagery in 1973, sea ice concentration data for the Antarctic are not available, and sea ice extent data are not readily available for indi - vidual months, seasons or years, although some visible and infrared data do exist for 1966 — 1972 [Zwally et al., 1983] and some undigitized charts reside in national archives (e.g., V. Smolyanitsky, personal communication, 2002).

Currently, the NASA IceBridge mission supplies both sea ice thickness and snow depth measurements in spring, providing timely information on the state of the ice cover as the melt season begins.