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.
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.
From whale bones, 42 Arctic driftwood, 26 and patterns of Arctic shoreline erosion, 25 we also know that during the Holocene, Arctic
summer sea ice retreated 1000 kilometers further north than seen today.
2) The water will warm rapidly due to rapid
summer sea ice retreat.
Not exact matches
Dr James Screen from the University of Exeter used a computer model to investigate how the dramatic
retreat of Arctic
sea ice influences the European
summer climate.
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.
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.
Arctic
sea ice, in
retreat for years, shrank to its lowest extent in recorded history this past
summer.
News headlines about record - breaking temperatures, disappearing
summer sea -
ice and
retreating Greenland glaciers frequently remind us that the Arctic is warming more rapidly than any other place on Earth.
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 shelv
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 shelv
Sea coast, indicating increased basal melting due to increased ocean heat fluxes in the cavities below the
ice shelves.
The vast, scrabbly sheath of
sea ice drifting on the Arctic Ocean ended its annual
summer retreat this week, and the result was sobering.
Polar bears may be endangered by hunting, but they are not endangered by the
retreat of the
summer Arctic
sea ice.
It is pushing for new oil and gas drilling in polar bear habitat while biologists for Interior Department, prodded by legal action, recommended the bear be given threatened status under the species act because of the warming of the Arctic and
summer retreat of
sea ice.
I am very well aware and have previously blogged that there are multiple factors that determine the degree of
ice lost any given year — but the literature is clear that even in 2007, global warming played «a large part» (see «What drove the dramatic
retreat of arctic
sea ice during
summer 2007?
The story focuses in part on the pushback against assertions that Arctic
sea ice is in a «death spiral» based on the extraordinary
retreat in
summer 2007.
Yesterday, the Commerce Department and University of New Hampshire released the details of last
summer's sonar survey of the
sea floor off the Alaskan coast, which was able to push nearly 200 miles farther out toward the North Pole than it had in previous years because of the extraordinary
ice retreat of 2007.
A team of scientists is pioneering new strategies for ensuring that polar bears can persist even as
summer sea ice — a vital feeding platform —
retreats under the climate change that is already in the pipeline no matter how aggressively societies tackle the greenhouse challenge.
Even with the increasing
summer retreats of
sea ice, which climate scientists say are being driven in large part by global warming caused by humans....
Fourteen research teams studying the impacts of warming on the Arctic Ocean have issued independent projections of how the
sea ice will behave this
summer, and 11 of them foresee an
ice retreat at least as extraordinary as last year's or even more dramatic.
There's also new analysis by a team from the Naval Postgraduate school, led by Wieslaw Maslowski, pointing to a complete late -
summer retreat of Arctic Ocean
sea ice by the end of this decade and possibly 2016.
Although again I challenge you to name even five polar scientists who do not think human - caused global warming is the dominant cause of «the increasing
summer retreats of
sea ice.»
Steven C. Amstrup, the federal biologist who led an analysis last year concluding that the world's polar bear population could shrink two thirds by 2050 under moderate projections for
retreating summer sea ice, is once again in the field along Alaska's Arctic coast, studying this year's brood of cubs, yearlings and mothers.
But as a starting point, I'll propose now — and I'll change this if they disagree — the names of some leading scientists in this field who would NOT say there is sufficient evidence to conclude that human - caused global warming IS the main cause of increasing
summer retreats of
sea ice (although they would say there is strong likelihood that it will eventually dominate):
On the other, however, the big recent
summer retreats of the floating
sea ice on the Arctic Ocean have created new opportunities, not just to chart possible shipping routes, but to expand surveys of the seabed that might someday lead to deep - ocean Arctic oil and gas drilling.
For the latest forecasts of this
summer's Arctic
ice retreat, have a look at Sea Ice Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum ice extent each summ
ice retreat, have a look at
Sea Ice Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum ice extent each summ
Ice Outlook 2009, an effort to collate and compare a variety of studies aiming to project the minimum
ice extent each summ
ice extent each
summer.
Even with the increasing
summer retreats of
sea ice, which polar scientists say probably are being driven in large part by global warming caused by humans....
The
retreat of
sea ice from the shores in
summer to an unprecedented distance is fostering erosion of the shore and increasing radically the amount of swimming bears must do to maintain their accustomed life partly on and partly off dry land.
Even with the increasing
summer retreats of
sea ice, which climate scientists say are being driven by global warming caused by humans....
Ms. Gormezano is not a fan of the forecasting methods used by Dr. Amstrup to conclude that a two - thirds reduction in polar bears is possible midcentury if
summer sea ice continues
retreating.
[Andy Revkin — On Arctic
ice trends, I have a post coming shortly on the latest update from the world's leading teams of
sea ice experts, showing this year's
retreat is unlikely to match last year's, while the long - term trend is still heading toward ever less
summer ice.
The effect of last
summer's wind anomaly and
ice - albedo feedback may be found in a number of publications, including ours: Zhang, J., R.W. Lindsay, M. Steele, and A. Schweiger, What drove the dramatic
retreat of Arctic
sea ice during
summer 2007?
[UPDATE, 5/20: Natalie Angier has written a nice column on the relatively unheralded walrus, which — like the far more charismatic polar bear — is having a hard time as Arctic
sea ice retreats earlier and farther each spring and
summer and forms later in the boreal fall.
I've freshly canvassed more than a dozen
sea -
ice experts to get their latest views on whether the remarkable Arctic
ice retreat of last
summer will be matched this year.
There was an eruption of assertions in recent days that the increasing
summer retreats and thinning of Arctic Ocean
sea ice might be a result not of atmospheric warming but instead all the heat from the recent discovered volcanoes peppering the Gakkel Ridge, one of the seams in the deep seabed at the top of the world.
In part because of warming and the
retreat and thinning of Arctic
sea ice in
summer, this northern
sea route is slowly becoming a reality.
And there are fresh findings on why the
sea ice around the North Pole has seen dramatic
summer retreats lately.
Historically, there had not been enough open water for polar bears in this region to swim the long distances we observed in these recent
summers of extreme
sea ice retreat.»
Arctic Ocean
Ice The latest summary of experts» projections for this summer's retreat of sea ice on the Arctic Ocean is out, and — partly because of different weather patterns than last year — the consensus for the moment is that the remarkable ice loss in 2007 will not be matched this ye
Ice The latest summary of experts» projections for this
summer's
retreat of
sea ice on the Arctic Ocean is out, and — partly because of different weather patterns than last year — the consensus for the moment is that the remarkable ice loss in 2007 will not be matched this ye
ice on the Arctic Ocean is out, and — partly because of different weather patterns than last year — the consensus for the moment is that the remarkable
ice loss in 2007 will not be matched this ye
ice loss in 2007 will not be matched this year.
As expected from my 2002 paper, the low A.O. conditions of late have sequestered quite a bit of
sea ice the Arctic, which should foster a more moderate
retreat of
sea ice extent this coming spring,
summer and fall.
[The move] is aimed at avoiding big ecological disruptions as the expanding
summer retreats of
sea ice on the Arctic Ocean expose virgin waters.
So if you apply a negative sign to the figure at the bottom of / / seaice.apl.washington.edu/AO/, I would expect colder than normal spring especially in the Eurasian Arctic, less
retreat of
sea ice this
summer, then colder than normal this fall in the Eurasian Arctic....
[1:25 p.m. Updated The National Snow and
Ice Data Center has concluded, with a couple of caveats, that the annual summer retreat of Arctic sea ice has end
Ice Data Center has concluded, with a couple of caveats, that the annual
summer retreat of Arctic
sea ice has end
ice has ended.
The same
sea -
ice experts foreseeing a new record
retreat of the Arctic Ocean coverage this
summer have explanations for the flow between Greenland and Iceland, too.]
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 occu
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 occu
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 occu
ice minimum occurs.
Zhang, J., R. Lindsay, M. Steele, and A. Schweiger (2008), What drove the dramatic
retreat of arctic
sea ice during
summer 2007?
The latest movie movie (5) shows the rapid
retreat of arctic
sea ice in
summer 2007 and 2008.
The Davis Strait polar bear subpopulation is said to be «vulnerable» to the supposed effects of global warming because, like Hudson Bay, Davis Strait
sea ice retreats every
summer, leaving polar bears on land for several months.
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...
This has never happened before because the
sea ice never
retreated very much in the
summer and the water temperature could not rise above zero because of the
ice cover... The permafrost is acting as a cap for a very large amount of methane (CH4), which is sitting in the sediments underneath in the form of methane hydrates.
The
sea ice now
retreats when it can, during
Summer which cools the Arctic Ocean.