Sentences with phrase «summer melt of sea ice»

As the sun begins its seasonal descent in the Arctic sky and temperatures drop, the summer melt of sea ice is slowing down.

Not exact matches

The discovery is incredibly important, though, because it shows scientists exactly why the most vulnerable parts of Greenland's ice are melting so quickly — each summer since 1997, melting ice that would usually be captured and refrozen the next winter is now flowing straight out to sea.

But Arctic sea ice has been consistently below the long - term average since 2003 and the summer melts of 2007, 2008 and 2009 were the three largest melts recorded.

Due to global warming, larger and larger areas of sea ice melt in the summer and when sea ice freezes over in the winter it is thinner and more reduced.

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.

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

Dr Screen said: «The results of the computer model suggest that melting Arctic sea ice causes a change in the position of the jet stream and this could help to explain the recent wet summers we have seen.

The next step is to use estimates of future sea ice loss to make predictions of how further melting could influence summer rainfall in Europe in the years to come.

It is likely that several other factors, combined with the impact of melting Arctic sea ice, explain the recent run of wet summers.

During a record melting jag this past summer, the Greenland ice sheet lost 552 billion tons (19 billion tons lower than the previous low), and the volume of sea ice fell to half the volume it had four years ago.

The melting and retreating of Arctic sea ice in the summer months also has allowed PWW to move further north than in the past when currents pushed it westward toward the Canadian archipelago.

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.

There has been a huge increase in the amount of sea ice melting each summer, and some are now predicting that as early as 2030 there will be no summer ice in the Arctic at all.

That helped drive last summer's near - record thaw of Arctic sea ice, second only to the dramatic melt observed in 2007.

It has also decreased the amount of the oldest, thickest Arctic sea ice, leaving polar waters dominated by thinner ice that forms in the fall and melts in the summer.

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.

«There must have been significant melt - back of sea ice each summer even at the height of the last ice age to have sea ice formation on the shelves each year.

Virtually all of Antarctica's sea ice melts or gets blown away every summer.

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.

Greenland's ice sheet melted nearly 19 billion tons more than the previous high mark, and the volume of Arctic sea ice at summer's end was half what it was just four years ago, according to new NASA satellite data obtained by the Associated Press (AP).

The spring melt began a month earlier than normal, and though the pace of decline slowed some over the summer, the Bering and Chukchi Seas along Alaska's coast remained ice - free longer into the fall than ever before.

and the examples that he thinks have the potential to be large scale tipping elements are: Arctic sea - ice, a reorganisation of the Atlantic thermohaline circulation, melt of the Greenland or West Antarctic Ice Sheets, dieback of the Amazon rainforest, a greening of the Sahara, Indian summer monsoon collapse, boreal forest dieback and ocean methane hydratice, a reorganisation of the Atlantic thermohaline circulation, melt of the Greenland or West Antarctic Ice Sheets, dieback of the Amazon rainforest, a greening of the Sahara, Indian summer monsoon collapse, boreal forest dieback and ocean methane hydratIce Sheets, dieback of the Amazon rainforest, a greening of the Sahara, Indian summer monsoon collapse, boreal forest dieback and ocean methane hydrates.

Since IPCC (2001) the cryosphere has undergone significant changes, such as the substantial retreat of arctic sea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelvsea ice, especially in summer; the continued shrinking of mountain glaciers; the decrease in the extent of snow cover and seasonally frozen ground, particularly in spring; the earlier breakup of river and lake ice; and widespread thinning of antarctic ice shelves along the Amundsen Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelvSea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the ice shelves.

The volume of sea ice left at the end of the summer melt season seems to vary more from year to year than had perhaps been previously appreciated; after declining for several years, sea ice volume shot up after the unusually cool summer of 2013, the data revealed.

Rapid Arctic sea - ice decline: Summer - time melting of Arctic sea - ice has accelerated far beyond the expectations of climate models.

For example, the area of summer sea - ice melt during 2007 - 2009 was about 40 % greater than the average projection from the 2007 IPCC Fourth Assessment Report.

As to the melting of sea ice, the theory has predicted summer melt would increase on average over time.

Rising temperatures cause the sea ice to melt earlier in the year, driving the bears to shore before they have built sufficient fat reserves to survive the period of scarce food in the late summer and early fall.

4:37 p.m. Updated below In his predictable assault on my piece on past and future sea ice patterns, causes and consequences, Joe Romm proposed a bet on the state of Arctic Ocean sea ice (presumably the peak summer melt):

In addition, with the increase in summer melting of Arctic sea ice, human activity is increasing.

The point here isn't that anybody can prove that there has never been this extent of Greenland melting at some prior time in the Holocene, but that all of these indicators taken together (Arctic temperatures, low sea ice extent in summer * and * winter, permafrost melting, decreased snow cover, Greenland melting) indicate that the Arctic as a whole really is warming in an exceptional way.

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.

Having said that, it is a really small effect — if the entire Arctic summer sea ice pack melted (average thickness 2 metres, density ~ 920 kg / m3, area 3 × 10 ^ 6 km ^ 2 (0.8 % total ocean area) = > a 4.5 cm rise instantly which implies a global sea level rise of 0.36 mm.

The record melting of Arctic sea ice observed this summer and fall led to record - low levels of ice in both September and October, but a record - setting pace of re-freezing in November, according to the NASA Earth Observatory.

Of course, sea ice wouldn't have that difficulty but there is only 5,000 cu km of summer sea ice left, it having been melting away for a few decades now when BNO (S) requires not melting but the freezing of 360,000 cu kOf course, sea ice wouldn't have that difficulty but there is only 5,000 cu km of summer sea ice left, it having been melting away for a few decades now when BNO (S) requires not melting but the freezing of 360,000 cu kof summer sea ice left, it having been melting away for a few decades now when BNO (S) requires not melting but the freezing of 360,000 cu kof 360,000 cu km.

Any existing ice this year will form the basis of the multi-year ice, yes — but the sea forms at the bottom, in contact with sea water, and melts at the top — so at the end of next summer, all of this year's ice could have melted off the top, leaving only the new ice beneath, possibly thinner than this year.

Today, the National Snow and Ice Data Center announced that the annual summer retreat of Arctic Ocean sea ice had reached a new low for the 33 - year satellite era of careful monitoring (1.58 million square miles, or 4.1 million square kilometers), and there is still another week or two of melting before the typical summer ice minimum occuIce Data Center announced that the annual summer retreat of Arctic Ocean sea ice had reached a new low for the 33 - year satellite era of careful monitoring (1.58 million square miles, or 4.1 million square kilometers), and there is still another week or two of melting before the typical summer ice minimum occuice had reached a new low for the 33 - year satellite era of careful monitoring (1.58 million square miles, or 4.1 million square kilometers), and there is still another week or two of melting before the typical summer ice minimum occuice minimum occurs.

The National Snow and Ice Data Center released its summary of summer sea - ice conditions in the Arctic on Tuesday, noting a substantial expansion of the extent of «second - year ice» — floes thick enough to have persisted through two summers of meltiIce Data Center released its summary of summer sea - ice conditions in the Arctic on Tuesday, noting a substantial expansion of the extent of «second - year ice» — floes thick enough to have persisted through two summers of meltiice conditions in the Arctic on Tuesday, noting a substantial expansion of the extent of «second - year ice» — floes thick enough to have persisted through two summers of meltiice» — floes thick enough to have persisted through two summers of melting.

The sea ice at the end of this summer's period of melting is predicted to match or beat the all - time record low of 2007 and one research group at the University of Bremen in Germany has already announced that the ice this year has already set a record.

In recent years, Greenland's ice has been melting more and flowing faster into the sea — a record amount of ice melted from the frozen mass this summer, according to recently released data — and Earth's rising temperatures are suspected to be the main culprit.

Scientists at the National Snow and Ice Data Center, in Boulder, Colorado measured the sea ice at the end of the 2012 summer period of melting and the measurements do not bode well for the extraordinary wildlife, ecology and cultures of the regiIce Data Center, in Boulder, Colorado measured the sea ice at the end of the 2012 summer period of melting and the measurements do not bode well for the extraordinary wildlife, ecology and cultures of the regiice at the end of the 2012 summer period of melting and the measurements do not bode well for the extraordinary wildlife, ecology and cultures of the region.

OK, so apart from the Hockey stick graph, the disappearance of the Himalayan glaciers, the melting of summer Arctic sea ice, the lack of hurricane activity, the erroneous relationship between malaria and global warming, the resilience of corals, the obstinacy of Tuvalu and the Maldives to disappear to the sea, the manipulation of instrumental temperature data... (Gasp for breath!)

As we near the final month of summer in the Northern Hemisphere, NASA scientists are watching the annual seasonal melting of the Arctic sea ice cover.

(08/31/2009) If current melting trends continue, the Arctic Ocean is likely to be free of summer sea ice by 2015, according to research presented at a conference organized by the National Space Institute at Technical University of Denmark, the Danish Meteorological Institute and the Greenland Climate Center.

Only during interglacials, like the one we are in now, does some of the sea ice melt during summer, when the top of the planet is oriented a bit more towards the Sun and receives large amounts of sunlight for several summer months.

So a shift to this pattern for end of summer 2012 is likely to enhance melt and shrink sea ice even further.

The Arctic's sea ice pack thawed to its third - lowest summer level on record, up slightly from the seasonal melt of the past two years but continuing an overall decline symptomatic of climate change, U.S. scientists said on Thursday.

My question still stands: why was there a large arctic sea ice melt in 2008 and 2009 and not in 1998, given that 1998, for whatever reason, was a year of high summer temperatures in the Northern Hemisphere?

«Based on relationships established in previous studies, the extreme negative phase of the Arctic Oscillation (AO) that characterized winter of 2009/2010 should have favored retention of Arctic sea ice through the 2010 summer melt season.

And remember, the satellite data are one small part of a vast amount of data that overwhelmingly show our planet is warming up: retreating glaciers, huge amounts of ice melting at both poles, the «death spiral» of arctic ice every year at the summer minimum over time, earlier annual starts of warm weather and later starts of cold weather, warming oceans, rising sea levels, ocean acidification, more extreme weather, changing weather patterns overall, earlier snow melts, and lower snow cover in the spring...