Sentences with phrase «much less sea ice»

Barents Sea numbers have probably increased since 2005 and have definitely not declined despite much less sea ice cover.

For several thousand years, there was much less sea ice in the Arctic Ocean — probably less than half of current amounts....

Not exact matches

«We can also combine that data with projections of sea ice, to predict how much more or less it will cost these animals to make a living over the next century,» Fischbach says.

It had much higher sea levels, forests extended all the way to the Arctic Ocean, and there was almost certainly a lot less sea ice.

He said that sensitivity includes water vapour and arctic sea ice, but I suspect that the changes in sea ice in the models are much less than we are seeing in practice.

That is a major change in sea currents, warming, wildlife, coastal erosion, and much less solar energy being bounced back into space by ice that in not there.

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.

In his seminal 1982 book Climate, History, and the Modern World, the renown climatologist Dr. H.H. Lamb revealed that sea ice in the subarctic and Arctic regions was much less extensive during the Medieval Warm Period (9th - 13th centuries) compared to today.

The findings suggest that while the response of Antarctic summer sea ice to human - caused climate change may be less dramatic than in the Arctic, sea ice cover may have declined by as much as 14 % over the last 100 years.

If thermal expansion is no longer contributing, you would expect either less total sea level rise or a much greater contribution from melting ice.

Increased melting of sea ice did occur in the 1920s and 1930s in the Barents Sea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent yeasea ice did occur in the 1920s and 1930s in the Barents Sea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent yeaSea (Ifft, Monthly Weather Review, November, 1922, p. 589) and over the Arctic Basin (Ahlmann, 1949, Rapports et Proces - Verbaux des Revions du Conseil International pour l'Exploration de la Mer 125, 9 - 16) but it was much less so than in recent years.

Its simple, winter was much smaller in extent, mimicking directly the lesser volume of Arctic sea ice.

Simple physics dictates that with less sea ice there is magnified warming of the Arctic due to powerful albedo feedback; this in turn reduces the equator to pole temperature gradient which slows the jet stream winds causing them to become more meridional; this combined with 4 % more water vapor in the atmosphere (compared to 3 decades ago) is leading to much more extremes in weather.

It is important to note that although the sea ice has changed greatly in the past few decades, it has changed much less during the polar breeding season.

Apart from these last concerns, the WAIS is much less worrying than the GIS, because the huge thermal inertia and albedo effect of the EAIS, the antarctic continent itself, and the large amount of antarctic sea ice in the southern winter, all act to reduce the degree of warming for the WAIS (whereas the GIS is the victim of various unfortunate circumstances which amplify warming there).

Also less ice cover allows the vastly warmer sea water to warm the much colder arctic air.

Research indicates that the Arctic had substantially less sea ice during this period compared to present Current desert regions of Central Asia were extensively forested due to higher rainfall, and the warm temperate forest belts in China and Japan were extended northwards West African sediments additionally record the «African Humid Period», an interval between 16,000 and 6,000 years ago when Africa was much wetter due to a strengthening of the African monsoon While there do not appear to have been significant temperature changes at most low latitude sites, other climate changes have been reported.

If the opposite happened and there was too much sea ice, then foraging trips took longer and penguin chicks were less likely to survive.

Actually since ice is pretty much freshwater and hence less dense, when it melts in sea water the sea level will rise but only by a very small amount.

Recent evidence of faster rates of global sea - level rise suggests that these projections may be too low.3, 4,5 Given recent accelerated shrinking of glaciers and ice sheets, scientists now think that a rise of 2.6 feet (80 centimeters) is plausible — and that as much as 6.6 feet (2 meters) is possible though less likely.16

Prior to 1978, satellite measurements of sea ice extent are not available and the data is much less reliable.

Actually the argument makes more sense applied to the arctic sea ice — both in winter and summer, since it is at a much higher average latitude and therefore affects albedo much less.

When oceans get cold, and the surface of polar waters freezes, it snows much less and the sun takes away ice and limites the lower bound of temperature and sea level.

Heat from Arctic amplification over normal conditions in these regions is much smaller than on the other side of the pack because the ice covered these seas longer this year; The heat added due to Arctic amplification probably less than 6... and with most of that in the Beaufort, and not in the Chukchi and E. Siberian.

But deep water production by convection may be less, depending on how much NADW is Arctic in origin and how much is simply recirculated Antarctic bottom water (extremely dense water, formed as brine under the sea ice around polynas offshore of Antarctica and sliding down the continental shelf into the depths without much mixing, creates a giant pool of dense water extending all the way up the bottom of the Atlantic to about 60 ° N).

But the influence of the release of heat - trapping gases is much less clear with sea ice around the South Pole.

In contrast, the larger East Antarctic ice sheet sits almost entirely on bedrock above sea level, making it much less susceptible to climate change.

They found that open oceans are much less efficient than sea ice when it comes to emitting in the far - infrared region of the spectrum, a previously unknown phenomenon that is likely contributing to the warming of the polar climate.

NSIDC scientists point out why we shouldn't be reading too much into one summer of less sea ice decline.

When the climate was much warmer, sea levels would have been substantially higher, because less water would've been locked up as ice.

If sea ice cover was 50 % less 5,000 years ago and polar bears were very much alive and well, it is hard to see how claims of their extinction are credible from future ice loss.

Hansen and Sato (7) argue that the climate of the most recent few decades is probably warmer than prior Holocene levels, based on the fact that the major ice sheets in both hemispheres are presently losing mass rapidly (9) and global sea level is rising at a rate of more than 3 m / millennium (25), which is much greater than the slow rate of sea level change (less than 1 m / millennium) in the latter half of the Holocene (26).