Sentences with phrase «rapid sea ice melt»

The summer of 2012 witnessed periods of extremely rapid sea ice melt.

MacKinnon says the lack of sea ice changes the dynamics of that process by enabling the ocean to absorb more heat, creating a positive - feedback loop that begets more rapid sea ice melting.

Not exact matches

It also reviews recent scientific literature on «worst - case» global average sea - level projections and on the potential for rapid ice melt in Greenland and Antarctica.

In Greenland this doesn't happen much because the water drains away through big channels like the mega-canyon, so melting ice sheets there tend not to drive rapid sea level rises.

Melting can be rapid: as the last ice age ended, the disappearance of the ice sheet covering North America increased sea level by more than a metre per century at times.

In the Antarctic, where the summer season just wrapped up, rapid ice melt led to the lowest sea ice minimum ever recorded for the area.

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.

During the last deglaciation, and likely also the three previous ones, the onset of warming at both high southern and northern latitudes preceded by several thousand years the first signals of significant sea level increase resulting from the melting of the northern ice sheets linked with the rapid warming at high northern latitudes (Petit et al., 1999; Shackleton, 2000; Pépin et al., 2001).

We see early indications of this effect in the massive and unanticipated rapid melting of the Arctic sea ice.

Jacobson has also said that soot from diesel engines, coal - fired power plants and burning wood is a «bigger cause of global warming than previously thought, and is the major cause of the rapid melting of the Arctic's sea ice».

By Kenneth Richard Geophysicist and tectonics expert Dr. Aftab Khan has unearthed a massive fault in the current understanding of (1) rapid sea level rise and its fundamental relation to (2) global - scale warming / polar ice melt.

This is because it is grounded below sea level, and marine ice sheets such as these are susceptible to rapid melting at their base.

The ice sheet in this area is grounded up to 2000 m below sea level, making it intrinsically unstable6 and susceptible to rapid melting at its base, and to rapid migration of the grounding line up the ice stream7 (see Marine Ice Sheet Instabilitice sheet in this area is grounded up to 2000 m below sea level, making it intrinsically unstable6 and susceptible to rapid melting at its base, and to rapid migration of the grounding line up the ice stream7 (see Marine Ice Sheet Instabilitice stream7 (see Marine Ice Sheet InstabilitIce Sheet Instability).

Just last year, for example, the UK had its second - coldest March since records began, prompting the Met Office to call a rapid response meeting of experts to get to grips with whether melting Arctic sea - ice could be affecting British weather.

Main results show that ice cap melt on Greenland and / or Antarctica injects fresh water into oceans near respective continents causing rapid sea level rise and shuts down AMOC and / or SMOC leading to enormous global climate disruption, including massive storms.»

Melting permafrost outgasses CO2 and methane, and the decrease in sea ice allows oceanic CO2 to mix back into the atmosphere; taken together, these processes greatly amplify the effect of increased sunlight, driving a relatively rapid exodus from the ice age.

So, the positive feedback between melt and velocities implies that more melt leads to higher velocities, which bring in more ice from cold regions to warm regions which increases the melt and hence the velocity etc, with as a final result a rapid loss of ice and hence an enhanced increased sea level.

And how that contributes to the rapid rate of sea - ice melting.

The rapid melting of Arctic ice would raise sea levels and render low - lying areas such as Miami and New Orleans more vulnerable to coastal flooding.

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.

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.

The rapid warming and increased solar radiation absorption have combined to result in younger, thinner Arctic sea ice, which therefore melts more easily, making record low extents more likely to occur.

Some mechanisms for that are hypothesized, e.g. methane release from polar regions, increased melting of Greenland leading to stopping the Gulf Stream, rapid reduction of Arctic sea - ice and its positive feedback, collapse of Antarctic ice shelves, loss of the Amazon, large volcanoes, asteroid impacts, unexpected solar variation.

Although there is a general consensus among models that rising CO2 will drive warming and continued ice melt into the future, IPCC models failed to predict the current level of rapid sea ice reduction.

Global warming has led to the rapid melting of Arctic sea ice.

The likelihood of the complete loss of Arctic summer sea ice by 2030, faster melting of the vast Greenland ice sheets, and the rapid and quickening thaw of permafrost regions indicate that the window for arresting climate change before tipping points are reached is rapidly closing.

The rapid melting of the Arctic sea ice, then, illuminates the difficulty of modelling the climate — but not in a way that brings much comfort to those who hope that fears about the future climate might prove exaggerated.

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.

Sea level will increase slowly at first,... but as Greenland and West Antarctic ice is softened and lubricated by melt - water and as buttressing ice shelves disappear due to a warming ocean, the balance will tip toward ice loss, thus... causing rapid ice sheet disintegration.

And older climate models did not include dynamic ice sheet vulnerabilities — like high latent - heat ocean water coming into contact with the submerged faces of sea - fronting glaciers, the ability of surface melt water to break up glaciers by pooling into cracks and forcing them apart (hydrofracturing), or the innate rigidity and frailty of steep ice cliffs which render them susceptible to rapid toppling.

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.

Scientists: Warming causes Antarctic ice sheet growth, and lower sea levels By Kenneth Richard While many scientists are projecting rapid sea level rise as a result of a warmer Antarctica and consequent ice sheet melting, other scientists are projecting that the surface of the Antarctic ice sheet will gain in mass because a warmer Antarctica means snow and ice accumulation will outpace the -LSB-...]

There is no evidence of a rapid rise in sea level caused by melting ice / warming waters and the 12 foot referenced above is sheer fantasy

If today's worst - case global warming scenarios of catastrophic melting of glaciers and ice sheets come to pass, sea levels could rise rapidly, wreaking all sorts of geological havoc «comparable with the most rapid increases in sea level that we've seen in the last 15,000 years,» McGuire said.

We know it from direct measurements of land and water, from shifts in where animals and plants live, from rapid increases in glacier and ice sheet melt, from sea level rise (due less to melting ice, and more to expansion as the water warms).

Scientists have been alarmed by the increasingly rapid melting of Arctic sea ice, which reached a new record minimum this year and, if melting continues at similar rates, could be ice free in summer by the end of the decade.

With Arctic sea ice reaching its lowest level in the satellite record after an astonishingly rapid summer melt, the question of whether disappearing sea ice might lead to more extreme winters in Europe and North America needs more scrutiny.

The rapid melt of small glaciers and mountain ice caps will be the main source of sea level rise over the next century, according to a new study.

Melting ice sheets because of global warming turns out to be a much more rapid and potentially worrisome source of sea level rise.

I understand that melting sea ice does not contribute to sea level rise, but the fact that Antarctic sea ice is at record high levels seems inconsistent with proposed rapid melting of Antarctic ice sheets.

The loss of sea ice is interesting, but the melt of permafrost with subsequent, rapid biological evolution of CH4 is a really big story.

For example, the rapid melting of glaciers, the collapse of these glaciers and shrinking sea ice in winter, everything seems to have an impact on marine life.

Rapid warming in the Arctic has already led to the rapid decline of summer sea ice and melting of glaciers.

Although high concentrations of sea ice still remain in the central section of the passage, Howell predicts that this ice will melt out by September if above normal air temperatures and the rapid rate of decline observed in July persists through August.

A panel of the world's leading climate scientists strongly asserted Friday that «it is extremely likely that human influence has been the dominant cause» of global warming since 1950 and warned of more rapid ice melt and rising seas if governments do not aggressively act to reduce the pace of greenhouse gas emissions.