Sentences with phrase «changes in sea ice extent»

To a large extent that is because the 9 % figure also includes an effect, when anomaly temperatures are used, from changes in sea ice extent.

The prediction is initialised with the mean of the observed sea ice extent for September 2009 - 2013 and an ensemble prediction is created simply by adding all of the observed changes in the sea ice extent record from one September to the next over the historical period 1979 - 2013.

Changes in sea ice extent, timing, ice thickness, and seasonal fluctuations are already having an impact on the people, plants, and animals that live in the Arctic.

Researchers at CIRES» National Snow and Ice Data Center [About NSIDC] investigate the dynamics of Antarctic ice shelves, new techniques for the remote sensing of snow and freeze / thaw cycle of soils, the role of snow in hydrologic modeling, linkages between changes in sea ice extent and weather patterns, large - scale shifts in polar climate, river and lake ice, and the distribution and characteristics of seasonally and permanently frozen ground.

Climate changes that began ~ 17,700 years ago included a sudden poleward shift in westerly winds encircling Antarctica with corresponding changes in sea ice extent, ocean circulation, and ventilation of the deep ocean.

Here is the rate of change in sea ice extent filtered with 182 day gaussian to remove the annual cycle.

Not exact matches

We have much better — and more conclusive — evidence for climate change from more boring sources like global temperature averages, or the extent of global sea ice, or thousands of years» worth of C02 levels stored frozen in ice cores.

We emphasize that because of the significant influence of sea ice on the climate system, it seems that high priority should be given to developing ways for reconstructing high - resolution (in space and time) sea - ice extent for past climate - change events.

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.

Consistent with observed changes in surface temperature, there has been an almost worldwide reduction in glacier and small ice cap (not including Antarctica and Greenland) mass and extent in the 20th century; snow cover has decreased in many regions of the Northern Hemisphere; sea ice extents have decreased in the Arctic, particularly in spring and summer (Chapter 4); the oceans are warming; and sea level is rising (Chapter 5).

The global mean temperature rise of less than 1 degree C in the past century does not seem like much, but it is associated with a winter temperature rise of 3 to 4 degrees C over most of the Arctic in the past 20 years, unprecedented loss of ice from all the tropical glaciers, a decrease of 15 to 20 % in late summer sea ice extent, rising sealevel, and a host of other measured signs of anomalous and rapid climate change.

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...

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.

We emphasize that because of the significant influence of sea ice on the climate system, it seems that high priority should be given to developing ways for reconstructing high - resolution (in space and time) sea - ice extent for past climate - change events.

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.

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.

In my briefings to the Association of Small Island States in Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's modelIn my briefings to the Association of Small Island States in Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's modelin Bali, the 41 Island Nations of the Caribbean, Pacific, and Indian Ocean (and later circulated to all member states), I pointed out that IPCC had seriously and systematically UNDERESTIMATED the extent of climate change, showing that the sensitivity of temperature and sea level to CO2 clearly shown by the past climate record in coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's modelin coral reefs, ice cores, and deep sea sediments is orders of magnitude higher than IPCC's models.

[ANDY REVKIN comments: The Antarctic has seen no change in the extent of floating sea ice in recent years, in stark contrast to the situation in the Arctic, and all of this shows the Earth's climate system, particularly at the poles, is not simple — and thus not likely to follow a simple trajectory under a greenhouse push from humans.

By contrast, true Ice Ages drastically reshaped the planet, with much greater changes in global temperature, sea level, and ice exteIce Ages drastically reshaped the planet, with much greater changes in global temperature, sea level, and ice exteice extent.

The established icons of Arctic climate change are the polar bear and, to a lesser extent, those indigenous communities that are trying to maintain traditional ways in the face of slushy floes and the relentless erosion of coasts exposed to waves as sea ice retreats.

Our results hence show that the observed evolution of Arctic sea - ice extent is consistent with the claim that virtually certainly the impact of an anthropogenic climate change is observable in Arctic sea ice already today.»

How do you expect changes in the AMOC to relate to Arctic Sea Ice extent?

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.

All climate models tell us that it is the Arctic sea ice cover that declines first, and that Antarctic ice extent falls only later, and may even (as observed) temporarily increase in response to changing patterns of atmospheric circulation.

This finding is consistent with the expected effect of increasing greenhouse gas concentrations and with other observed evidence of a changing climate such as reductions in Arctic sea ice extent, melting permafrost, rising sea levels, and increases in heavy downpours and heat waves.

So, I was curious about your recent paper and whether there was any discussion of changes in the THC poleward of the GIS shelf vs the data from the RAPID program line located at 26.5 N. With the decline in minimum extent and volume of sea - ice, one might expect to see more THC sinking into the Arctic Ocean, with consequences for both climate and weather.

From the Archives, Oct. 2, 2009 The established icons of Arctic climate change are the polar bear and, to a lesser extent, those indigenous communities that are trying to maintain traditional ways in the face of slushy floes and the relentless erosion of coasts exposed to waves as sea ice retreats.

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

«Sea ice extent averaged over the Northern Hemisphere has decreased correspondingly over the past 50 years... The largest change has been observed in the summer months with decreases exceeding 30 %.

(09/28/2011) After the Arctic sea ice extent hit its second lowest size on record this summer — or lowest (depending on the source)-- comes another climate change shocker: in the past six years Canada's millennia - old ice shelves have shed nearly half their size.

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.

An overall warming in the 2 × CO2 experiment causes reduction of sea - ice extent by 15 %, with maximum decrease in summer and autumn, consistent with observed seasonal sea - ice changes.

Keywords: Arctic sea ice, Antarctic sea ice, passive microwave imaging, global warming, climate change, polar ice caps, sea ice extent, sea ice dispersion, trends, uncertainty in trends, statistical inference

; North Pole Cam 1 & 2; Arctic Sea Ice Extent Averaging Below 2007 Anomaly; Paleoclimate Implications for Human - Made Climate Change; UN Security Council Addresses Considers Global Security and Climate Change; New study details glacier ice loss following ice shelf collapse; Climate Change To Spawn More Wildfires; Gingrich Says 2006 Climate Change Ad He Starred In Was «Misconstrued&raqIce Extent Averaging Below 2007 Anomaly; Paleoclimate Implications for Human - Made Climate Change; UN Security Council Addresses Considers Global Security and Climate Change; New study details glacier ice loss following ice shelf collapse; Climate Change To Spawn More Wildfires; Gingrich Says 2006 Climate Change Ad He Starred In Was «Misconstrued&raqice loss following ice shelf collapse; Climate Change To Spawn More Wildfires; Gingrich Says 2006 Climate Change Ad He Starred In Was «Misconstrued&raqice shelf collapse; Climate Change To Spawn More Wildfires; Gingrich Says 2006 Climate Change Ad He Starred In Was «Misconstrued»

When shifting winds caused open water to form 50 to 70 kilometers away, accessing food became more demanding, and their breeding success plummeted.7 Yet Barbraud et al absurdly argued that a reduction in sea ice extent, for unknown reasons, had lowered the penguin's survival.9 It was catastrophic climate change speculation based on nothing more than a meaningless statistical coincidence.

On the text on the extent of Arctic sea ice, the UK asked about changes in Arctic sea ice thickness and the US about summer sea ice extent, to which the CLAs replied that this information is discussed in detail in the underlying assessment.

Stéphanie Jenouvrier, a biologist at the Woods Hole Oceanographic Institution in the US, and colleagues from France and the Netherlands report in Nature Climate Change that changes in the extent and thickness of sea ice will create serious problems for a flightless, streamlined, survival machine that can live and even breed at minus 40 °C, trek across 120 kilometres of ice, and dive to depths of more than 500 metres.

For example, let's say that evidence convinced me (in a way that I wasn't convinced previously) that all recent changes in land surface temperatures and sea surface temperatures and atmospheric temperatures and deep sea temperatures and sea ice extent and sea ice volume and sea ice density and moisture content in the air and cloud coverage and rainfall and measures of extreme weather were all directly tied to internal natural variability, and that I can now see that as the result of a statistical modeling of the trends as associated with natural phenomena.

Vinnikov et al. (1999) used the aforementioned GFDL and Hadley Centre climate models, forced by greenhouse gases and sulfate aerosols, to project how Arctic sea ice extent would change in the future.

«Unusually cold winters, a slowing in upward global temperatures, or an increase in Arctic sea ice extent are often falsely cast as here - and - now disconfirmation of the scientific consensus on climate change.

The aim of the C - SIDE working group is to reconstruct changes in sea - ice extent in the Southern Ocean for the past 130,000 years, reconstruct how sea - ice cover responded to global cooling as the Earth entered a glacial cycle, and to better understand how sea - ice cover may have influenced nutrient cycling, ocean productivity, air - sea gas exchange, and circulation dynamics.

Non-annular atmospheric circulation change induced by stratospheric ozone depletion and its role in the recent increase of Antarctic sea ice extent.

Turner, J. et al (2009) Non-annular atmospheric circulation change induced by stratospheric ozone depletion and its role in the recent increase of Antarctic sea ice extent.

The relationship between the present ice extent and earlier extents in the Barents Sea changed relative to June 2008.

Previous research has shown that global warming will cause changes in ocean temperatures, sea ice extent, salinity, and oxygen levels, among other impacts, that are likely to lead to significant shifts in the distribution range and productivity of marine species, the study notes.

The criterion adopted here for having sufficiently removed the short term variability in order to get a stable estimation of the turning point (minimum sea - ice extent) of the annual cycle, was that there shall be only one change of direction.

Previous research has shown that global warming will cause changes in ocean temperatures, sea ice extent, salinity, and oxygen levels, among other impacts, that are likely to lead to shifts in the range and productivity of marine species.

Though most of the CMIP5 models project a nearly ice - free Arctic (sea ice extent less than 1 × 106 km2 for at least 5 consecutive years) at the end of summer by 2100 in the RCP8.5 scenario (see Section 12.4.6.1), some show large changes in the near term as well.

THERE HAS BEEN A WARMING TREND FROM THE 70s THRU THE LATE 90s,... accompanied by other changes tied to a warming trend (record low arctic sea ice extent & thickness, retreating glaciers, retreating snow lines, warming ocean surface temps, increases in sea height, de-alkalinizing oceans).

There are no radical departures in this report from the previous assessment, published in 2007; just a great deal more evidence demonstrating the extent of global temperature rises, the melting of ice sheets and sea ice, the retreat of the glaciers, the rising and acidification of the oceans and the changes in weather patterns (3).