Sentences with phrase «rapid changes in the sea ice»

As such, monitoring Arctic ice thickness may be useful for predicting rapid changes in sea ice.

Not exact matches

Its core is a flurry of recent research proposing that such extreme weather events in the midlatitudes are linked through the atmosphere with the effects of rapid climate change in the Arctic, such as dwindling sea ice.

Cryosphere Systems: How do rapid changes in cryosphere (continental and ocean ice) systems evolve with the earth system, and contribute to sea - level rise and increased coastal vulnerability?

We were particularly interested in the nature of this relationship because of the hypothesized seasonal movement of krill to inshore waters around the Antarctic Peninsula in winter, rapid changes in the climate and sea ice patterns of the Antarctic peninsula [15], [16] and the known relationships between baleen whales and krill.

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

Current changes in the ocean around Antarctica are disturbingly close to conditions 14,000 years ago that new research shows may have led to the rapid melting of Antarctic ice and an abrupt 3 - 4 metre rise in global sea level.

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.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

We propose that past abrupt climate changes were probably a result of rapid and extensive variations in sea - ice cover.

Even in the absence of huge amounts of carbon dioxide as a forcing mechanism, he said, there still appear to be trigger points that, once passed, can produce rapid warming through feedbacks such as changes in sea ice and the reflectivity of the Earth's surface.

I guess I am surprised that with better understanding of the importance of water vapor feedback, sulfate aerosols, black carbon aerosols, more rapid than expected declines in sea ice and attendant decreases in albedo, effects of the deposition of soot and dust on snow and ice decreasing albedo, and a recognition of the importance of GHGs that were probably not considered 30 years ago, that the sensitivity has changed so little over time.

From the still - violent Amazon frontier to the thawing North Pole sea ice there are signs that science, education, transparency and global communication networks can foster progress even in the face of rapid change.

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.

The end of the first half of the Holocene — between about 5 and 4 ka — was punctuated by rapid events at various latitudes, such as an abrupt increase in NH sea ice cover (Jennings et al., 2001); a decrease in Greenland deuterium excess, reflecting a change in the hydrological cycle (Masson - Delmotte et al., 2005b); abrupt cooling events in European climate (Seppa and Birks, 2001; Lauritzen, 2003); widespread North American drought for centuries (Booth et al., 2005); and changes in South American climate (Marchant and Hooghiemstra, 2004).

Sea level rise, ocean acidification and the rapid melting of massive ice sheets are among the significantly increased effects of human - induced global warming assessed in the survey, which also examines the emissions of heat - trapping gases that are causing the climate change.

«At the end of the last ice age around 11,000 years ago, the ice sheet went through a period of rapid, sustained ice loss when changes in global weather patterns and rising sea levels pushed warm water closer to the ice sheet — just as is happening today,» NASA said.

-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.

Polyak et al. (2010) looked at Arctic sea ice changes throughout geologic history and noted that the current rate of loss appears to be more rapid than natural variability can account for in the historical record.

The supposed stable configuration of geography, with relatively predictable climate patterns, coastlines and icepacks in familiar locations, and clear demarcations of territorial control on land are increasingly dubious assumptions as weather patterns change, sea levels rise and ice packs disintegrate while technological innovations, communications and global markets cause rapid fluctuations in the price in food and other essentials across boundaries.

The IPCC 2007 Fourth Assessment of climate change science concluded that large reductions in the emissions of greenhouse gases, principally CO2, are needed soon to slow the increase of atmospheric concentrations, and avoid reaching unacceptable levels.However, climate change is happening even faster than previously estimated; global CO2 emissions since 2000 have been higher than even the highest predictions, Arctic sea ice has been melting at rates much faster than predicted, and the rise in the sea level has become more rapid.

The result is a dramatic image of historic sea level change that goes beyond what is expected in the coming decades due to rapid global warming - induced ice cap melting.

The team believes the ancient tropical warming caused large, rapid atmospheric changes at the equator, the intensification of the Pacific monsoon, sea - ice loss in the north Atlantic Ocean and more atmospheric heat and moisture over Greenland and much of the rest of the Northern Hemisphere.

As sea ice declines, it becomes thinner, with less ice build - up over multiple years, and therefore more vulnerable to further melting.15 Models that best match historical trends project northern waters that are virtually ice - free by late summer by the 2030s.25, 26,12 Within the general downward trend in sea ice, there will be time periods with both rapid ice loss and temporary recovery, 27 making it challenging to predict short - term changes in ice conditions.

That estimate was based in part on the fact that sea level is now rising 3.2 mm / yr (3.2 m / millennium)[57], an order of magnitude faster than the rate during the prior several thousand years, with rapid change of ice sheet mass balance over the past few decades [23] and Greenland and Antarctica now losing mass at accelerating rates [23]--[24].

The rapid changes underway in the Arctic are partly caused by the disappearance of sea ice, which causes more light and heat to be absorbed at the ocean's surface during sunny months instead of being reflected into space.

The iconic image of rapid Arctic climate change is the dramatic reduction in sea ice.

[G] iven the rapid pace of ecological change in the Arctic, the long generation time, and the highly specialised nature of polar bears, it is unlikely that polar bears will survive as a species if the sea ice disappears completely.

Arctic summer sea ice is in rapid decline [2nd lowest extent on record after 2007, and perhaps more importantly, the lowest volume of ice ever — this, along with the methane increase, could indicate a tipping element has been crossed that will kick climate change into a higher gear]

The rapid nature of observed and predicted changes in the Arctic suggests that Arctic sea ice could possibly undergo nonlinear threshold behavior as it retreats.

Such weather patterns, which can feature relatively mild conditions in the Arctic at the same time dangerously cold conditions exist in vast parts of the lower 48, may be tied to the rapid warming and loss of sea ice in the Arctic due, in part, to manmade climate change.

For the main discussion of rapid changes in ice sheets, see the essay on Ice Sheets and Rising Seice sheets, see the essay on Ice Sheets and Rising SeIce Sheets and Rising Seas.

There must have been brief periods of very rapid temperature change mixed in there (certainly on the regional level) in addition to slower - warming periods, and I'm under the impression other data (such as Greenland ice cores and deep - sea cores) support that scenario as well.

Seems to me David's mistake is not noticing that the rapid events are internal to the climate system, not external; they may cause fast changes in albedo for example for a while; and they are modeled, see Dr. Bitz's work on Arctic sea ice, or any model including volcanos or Atlantic deep water currents etc..

If sea level begins changing more rapidly, for example due to rapid changes in ice sheet dynamics, then this simple extrapolation will likely represent a conservative lower bound on future sea - level change.

Since the TAR, increasing evidence has emerged indicating a more rapid disappearance of snow and sea - ice cover in some areas (e.g., Siberia, Alaska, the Greenland Sea), and consequent changes of albedo may be leading to further climate change (e.g., Holland and Bitz, 200sea - ice cover in some areas (e.g., Siberia, Alaska, the Greenland Sea), and consequent changes of albedo may be leading to further climate change (e.g., Holland and Bitz, 200Sea), and consequent changes of albedo may be leading to further climate change (e.g., Holland and Bitz, 2003).