Sentences with phrase «loss of sea ice by»

Not exact matches

Scientific observations show that in the Arctic, warming temperatures have led to a 75 % loss in sea ice volume since the 1980s, and recent reports suggest the Arctic Ocean will be nearly free of summer sea ice by 2050, said Sullivan.

In comparison, global sea levels are rising by about 3 millimetres a year, and a recent study estimated that one - third of that comes from ice loss in Antarctica and Greenland.

«I've accepted that the loss of sea ice, not subsistence [hunting of the animal] or the oil and gas industries, is the reason for the threat to the polar bears,» which are already protected by the more stringent Marine Mammal Protection Act of 1972, Kempthorne said.

«By refining the spatial pattern of mass loss in the world's second largest — and most unstable — ice sheet, and learning how that pattern has evolved, we are steadily increasing our understanding of ice loss processes, which will lead to better - informed projections of sea level rise.»

Antarctic sea ice saw an early maximum extent in 2016, followed by a very rapid loss of ice starting in early September.

He says previous predictive models of Greenland's ice loss did not adequately take into account the faster movement of its southern glaciers, which is accelerating the amount of ice entering the ocean: «Greenland is probably going to contribute more to sea level rise, and faster than predicted by these models.»

The IPCC's latest prediction for sea level rise — 0.2 to 0.6 metres by 2100 — takes this ice loss into account but it is based on the assumption that the rate of ice loss will remain constant.

Arctic sea ice loss of the magnitude expected in the next few decades could impact California's rainfall and exacerbate future droughts, according to new research led by Lawrence Livermore National Laboratory (LLNL) scientists.

Ocean waters melting the undersides of Antarctic ice shelves, not icebergs calving into the sea, are responsible for most of the continent's ice loss, a study by UC Irvine and others has found.

Complementary analyses of the surface mass balance of Greenland (Tedesco et al, 2011) also show that 2010 was a record year for melt area extent... Extrapolating these melt rates forward to 2050, «the cumulative loss could raise sea level by 15 cm by 2050 ″ for a total of 32 cm (adding in 8 cm from glacial ice caps and 9 cm from thermal expansion)- a number very close to the best estimate of Vermeer & Rahmstorf (2009), derived by linking the observed rate of sea level rise to the observed warming.

During the later period, when there was less sea ice, the whales dove significantly longer and deeper than in the earlier period — presumably in search of prey as the animals, in turn, changed their habits because of different ocean conditions brought on by sea ice loss.

The World Conservation Union projects the bears» numbers will drop by 30 % by 2050 (pdf) due to continued loss of Arctic sea ice.

Screen, J. A. & Francis, J. A. Contribution of sea ice loss to Arctic amplification is regulated by Pacific Ocean decadal variability.

The estimates of ice loss also helped them calculate the amount of sea level rise contributed by the ice sheet prior to 1990 — a number missing from the most recent Intergovernmental Panel on Climate Change report because of the lack of direct observations.

The loss of Arctic sea ice caused by climate warming is having world - wide effects on shipping, fishing, and human life.

Many scientists concede that without drastic emissions reductions by 2020, we are on the path toward a 4C rise as early as mid-century, with catastrophic consequences, including the loss of the world's coral reefs; the disappearance of major mountain glaciers; the total loss of the Arctic summer sea - ice, most of the Greenland ice - sheet and the break - up of West Antarctica; acidification and overheating of the oceans; the collapse of the Amazon rainforest; and the loss of Arctic permafrost; to name just a few.

«The region is profoundly affected by climate change — including loss of sea ice, acidification of the ocean, and increased access for industries that pose significant risks to the ocean environment.»

One study, published in Proceedings of the National Academy of Sciences in January, hinted at such a mechanism when it linked sea ice decline to apparent changes in the Arctic Oscillation during several winters preceded by large sea ice losses.

Such research is now becoming urgent as regional climate change is already impacting upon areas of West Antarctica and the Antarctic Peninsula [30] and colonies in this region may already be affected by the consequent loss of sea ice [8].

Total loss of the Arctic sea ice, caused by increasing CO2, will be catastrophic.

The motivation for this time series is to visualize the fact that the long term Arctic - wide loss of sea ice is not only happening in extent, which is well measured by satellites, but also in thickness, which isn't.

This loss is exacerbated by the intensifying Climate Destabilization (reportedly reflecting the start of the «Albedo Loss» feedback due to the decline of Arctic sea - ice and ice caps) which is suppressing subsistence farm yields and some commercial farm yields on a random basis by the impacts of extreme droughts, storms, floods, and heat and cold waloss is exacerbated by the intensifying Climate Destabilization (reportedly reflecting the start of the «Albedo Loss» feedback due to the decline of Arctic sea - ice and ice caps) which is suppressing subsistence farm yields and some commercial farm yields on a random basis by the impacts of extreme droughts, storms, floods, and heat and cold waLoss» feedback due to the decline of Arctic sea - ice and ice caps) which is suppressing subsistence farm yields and some commercial farm yields on a random basis by the impacts of extreme droughts, storms, floods, and heat and cold waves.

I don't know about the «freakout» claim, but I believe Peter Wadhams» ideas / estimates regarding the loss of arctic sea ice are going to prove to be much more accurate than the IPCC estimates that sea ice will be gone by midcentury.

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.

However, the idea is simple, and I've talked about this much in many presentations this winter: Take the amount of ice you need to get rid of from Greenland to raise sea level 2 m in the next century, reduce it by your best estimate of the amount that would be removed by surface mass balance losses, and try to push the rest out of the aggregate cross-sectional area of Greenland's marine - based outlet glaciers.

By my logic I'd apply the precautionary principle rather strongly if there was even a small chance of major effects such as near future sea ice loss...

If I understand AMEGs argument correctly, it is that we need to find engineering solutions in the Arctic to alleviate an effective emergency (on a basis of precautionary principle at very least) posed by possible majority loss of sea ice or escalation in methane release.

Although a recent downward trend in coverage is clearly visible by naked eye inspection, Goddard invites us to believe there has ``... been no net gain or loss of polar sea ice since records began.»

Average winter sea ice volume over the period, weighted by a loss of ∼ 3000 km3 between 2007 and 2008, was ∼ 14,000 km3.

Unfortunately, the tough scientific work to clarify ice and sea trends and dynamics has largely been obscured online by coverage focused on an error on Greenland ice loss that many polar scientists say made it into the new edition of the Times Comprehensive Atlas of the World (that's the British Times, just to be clear).

A typo in mine at # 25 is where 40,000 m3 should read 400,000 m3, and an addendum is the reference for the forcing from the Albedo Loss feedback shown in the satellite record: «Observational determination of albedo decrease caused by vanishing Arctic sea ice» See: http://eisenman.ucsd.edu/publications/Pistone-Eisenman-Ramanathan-2014.pdf

Combined climate / ice sheet model estimates in which the Greenland surface temperature was as high during the Eemian as indicated by the NEEM ice core record suggest that loss of less than about 1 m sea level equivalent is very unlikely (e.g. Robinson et al. (2011).

Alarmed at the pace of change to our Earth caused by human - induced climate change, including accelerating melting and loss of ice from Greenland, the Himalayas and Antarctica, acidification of the world's oceans due to rising CO2 concentrations, increasingly intense tropical cyclones, more damaging and intense drought and floods, including glacial lakes outburst loods, in many regions and higher levels of sea - level rise than estimated just a few years ago, risks changing the face of the planet and threatening coastal cities, low lying areas, mountainous regions and vulnerable countries the world over,

It's also worth noting that the area of sea ice coverage is influenced by the wind, and the rapid area loss of last summer was mainly wind - driven — but thin sea ice is more sensitive to wind forcing than thick sea ice is.

The fate of sea ice in the Arctic Ocean is determined by a complicated mix of factors, including the pressure changes, with the biggest loss of old thick ice resulting more from a great «flush» of floes than melting, Dr. Rigor and many other scientists tracking the region say.

In addition to the loss of old thick sea ice, the increased mobility of sea ice in the Beaufort Sea is consistent with the high sea ice mobility seen in the Atlantic sector by the drift of the «TARA» during the DAMOCLES experiment (Gascard, EOS, Vsea ice, the increased mobility of sea ice in the Beaufort Sea is consistent with the high sea ice mobility seen in the Atlantic sector by the drift of the «TARA» during the DAMOCLES experiment (Gascard, EOS, Vsea ice in the Beaufort Sea is consistent with the high sea ice mobility seen in the Atlantic sector by the drift of the «TARA» during the DAMOCLES experiment (Gascard, EOS, VSea is consistent with the high sea ice mobility seen in the Atlantic sector by the drift of the «TARA» during the DAMOCLES experiment (Gascard, EOS, Vsea ice mobility seen in the Atlantic sector by the drift of the «TARA» during the DAMOCLES experiment (Gascard, EOS, Vol.

The part you are missing is that in the Arctic, the loss of summer sea ice, results in a strong reduction in reflection of the sunlight, and absorption by the open ocean.

In case of achieving the 450 Scenario, that for instance requires all industrialised nations to reduce their GHG emissions by 25 - 40 percent between 1990 and 2020, Arctic summer sea ice would recover from around 2035 - quite sharply - and establish a new equilibrium state at around 2.5 million square kilometres of ice, still a loss of almost 2 million compared to the current situation.

Models created by experts said such a dramatic loss of sea ice would cause a sharp drop in the polar bear population and threaten their very survival.

Australian Antarctic Division glaciology program head Ian Allison said sea ice losses in west Antarctica over the past 30 years had been more than offset by increases in the Ross Sea region, just one sector of east Antarctisea ice losses in west Antarctica over the past 30 years had been more than offset by increases in the Ross Sea region, just one sector of east AntarctiSea region, just one sector of east Antarctica.

It has come to the point that if we continue losing mass in those areas, the loss can generate a self - reinforcing feedback whereby we will be losing more and more ice, ultimately raising sea levels by tens of feet.»

Shaye Wolf, climate science director for the Center for Biological Diversity, the conservation group that launched legal action to get Pacific walruses listed in 2008, told Earther that the agency's claim that walruses will adapt to climate change «is baseless, and simply doesn't match the science showing that walruses are being harmed by the devastating loss of their sea ice habitat.»

A rise in global mean sea level of between 0.09 and 0.88 metres by 2100 has been projected, mainly due to the thermal expansion of sea water and loss of mass from ice caps and glaciers».

By contrast atmospheric temperature amplification is not evident in the Antarctic which is insulated by relatively stable circumpolar winds, persistent sea - ice coverage and the loss of tropospheric ozonBy contrast atmospheric temperature amplification is not evident in the Antarctic which is insulated by relatively stable circumpolar winds, persistent sea - ice coverage and the loss of tropospheric ozonby relatively stable circumpolar winds, persistent sea - ice coverage and the loss of tropospheric ozone.

Provided that ocean and atmospheric conditions favor rapid melting in June and July, which we feel are still likely, it is therefore hypothesized that the 2013 fall sea ice extent will achieve values comparable to those of 2012, with regional losses governed by local wind and ice conditions and dynamics.

The divergence in timing of sea ice loss between models and data — decades as represented by ice volume in Figure 3 — is physically irreconcilable.

The International Conservation Union, in its latest red list of endangered wildlife, gave polar bears threatened status in May, projecting a decline of 30 percent by midcentury from current populations, mainly due to projected losses of sea ice in a warming world.

The northern melting will likely add to sea level rise explains lead author, Shfaqat Abbas Khan: «If this activity in northwest Greenland continues and really accelerates some of the major glaciers in the area — like the Humboldt Glacier and the Peterman Glacier — Greenland's total ice loss could easily be increased by an additional 50 to 100 cubic kilometers (12 to 24 cubic miles) within a few years.»

If both Greenland and West Antarctica shed the entirety of their ice burden, global sea levels would rise by 12 to 14 m. Although these icecaps would not disintegrate within a century, the loss of even a third of their mass — quite plausible if the rate of polar ice loss continues to double each decade — would force up the oceans by at least 4 m, with disastrous socioeconomic and environmental consequences.

-LSB-...] In fact, the global sea - ice record shows virtually no change throughout the past 30 years, because the quite rapid loss of Arctic sea ice since the satellites were watching has been matched by a near - equally rapid gain of Antarctic sea ice.