Sentences with phrase «ice levels suggesting»

Cooler temperatures revived sea ice levels suggesting a rapid recovery was possible if global warming was curbed, scientists say

Not exact matches

David, after your post four days ago of a smug, smirking, fake - Beatle - esque - hairstyled Harper, I was going to suggest that such images are dangerous to one's health since blood pressure increases to unhealthy levels and said images be replaced by an ice sculpture.

But new analyses like this, which show previously undiscovered deep canyons, suggest that a good chunk of East Antarctica's bed lies below sea level, rendering the ice sheet less stable than previously thought.

The deep grooves under the massive ice sheet could facilitate flow into the ocean, which suggests sea level rise estimates for this century need to be revised upwards

But recent studies of oxygen isotopes suggest that the level of CO2 was only a tenth of that required to melt the ice.

A large area of the Greenland ice sheet once considered stable is actually shedding massive amounts of ice, suggesting that future sea - level rise may be worse than expected, a team of scientists warned yesterday in a new study.

Computer model simulations have suggested that ice - sheet melting through warm water incursions could initiate a collapse of the WAIS within the next few centuries, raising global sea - level by up to 3.5 metres.»

A recent study by Robert Kopp at Princeton University (Nature, DOI: 10.1038 / nature08686) suggests sea levels were 8 to 9 metres higher than now during the last interglacial, in part due to the west Antarctic ice sheet melting.

The results, in the October 15 Science, agree with theoretical predictions, suggesting that superconducting gravimeters can help satellites chart the earth's gravity to map changes in polar ice cap thickness, seawater levels, atmospheric density and planetary geology.

The oxygen levels also varied in step with water levels as Rosetta flew around the comet, suggesting that ice and oxygen in 67P's atmosphere are coming from the same places in its nucleus.

Recent estimates suggest the West Antarctic Ice Sheet alone could contribute 3.3 metres to long - term global sea level rise.

But in a second run, in which greenhouse gas levels stopped rising after 2020, the sea ice shrank until 2020 then recovered, suggesting no tipping point had been passed.

«These findings add to mounting evidence suggesting that there are sweet spots or «windows of opportunity» within climate space where so - called boundary conditions, such as the level of atmospheric CO2 or the size of continental ice sheets, make abrupt change more likely to occur.

TIPPING POINT A new record of the Antarctic ice sheet's formation suggests that carbon dioxide levels in the atmosphere could soon reach a tipping point that will make the ice sheet more vulnerable to melting.

Our study suggests that at medium sea levels, powerful forces, such as the dramatic acceleration of polar ice cap melting, are not necessary to create abrupt climate shifts and temperature changes.»

The findings, published yesterday in the journal Science, suggest scientists still have much to learn about the factors that govern the behavior of ice sheets — knowledge that is crucial to developing more accurate projections of future sea level rise.

The academics suggest that the melting of the ice sheet may have been caused in part by the fact that some of it rests in basins below sea level.

Later on, other scientists suggested that it was a global fall in sea levels due to growing ice sheets that cut the sea off from the Atlantic Ocean.

Molecular - level simulations suggested that these droplets almost immediately began forming two stacked layers of hexagonal 2 - D ice, a form that Zeng previously discovered and dubbed Nebraska Iice, a form that Zeng previously discovered and dubbed Nebraska IceIce.

The study also finds that the Greenland ice sheet may contain more ice, with a greater potential to raise global sea levels, than previous research has suggested — about 2.75 inches more, to be exact.

Altogether, the new study suggests that the ice sheet has the potential to raise global sea levels by about 24.3 feet, should it melt entirely.

The new evidence has the potential to alter perceptions about which planets in the universe could sustain life and may mean that humans are having an even greater impact on levels of CO2 in Earth's atmosphere than accepted evidence from climate history studies of ice cores suggests.

, using different approaches, have posited that Antarctic ice sheets could add as much as a metre to sea levels by 2100, this new evidence suggests ice loss on this scale is «implausible», the paper says.

Joughin et al. (2010) applied a numerical ice sheet model to predicting the future of PIG, their model suggested ongoing loss of ice mass from PIG, with a maximum rate of global sea level rise of 2.7 cm per century.

While some earlier studies, using different approaches, have posited that Antarctic ice sheets could add as much as a metre to sea levels by 2100, this new evidence suggests ice loss on this scale is «implausible», the paper says.

Geologic shoreline evidence has been interpreted as indicating a rapid sea level rise of a few meters late in the Eemian to a peak about 9 meters above present, suggesting the possibility that a critical stability threshold was crossed that caused polar ice sheet collapse [84]--[85], although there remains debate within the research community about this specific history and interpretation.

When there are alternative explanations for arctic ice melt (historical writings that suggest natural periods of very rapid decline, ever - increasing levels of soot that can cause and accelerate melting), how can you be so certain that the cause is CO2 - induced?

1968 Studies suggest a possiblity of collapse of Antarctic ice sheets, which would raise sea levels catastrophically.

«suggesting that Arctic warming will continue to greatly exceed the global average over the coming century, with concomitant reductions in terrestrial ice masses and, consequently, an increasing rate of sea level rise.»

But I understand sea level rise right now is actually towards the upper end of estimates so this suggests either climate sensitivity is towards the high end, or ice sheets are very sensitive to low or medium climate sensitivity.

(The recent work of Huybers and Langmuir suggests that on ice - age time scales, the loading and unloading of the planet by ice growth / shrinkage and sea - level fall / rise may weakly organize the volcanoes, but not a lot, and with nothing interesting for our time.)

In a more recent paper, our own Stefan Rahmstorf used a simple regression model to suggest that sea level rise (SLR) could reach 0.5 to 1.4 meters above 1990 levels by 2100, but this did not consider individual processes like dynamic ice sheet changes, being only based on how global sea level has been linked to global warming over the past 120 years.

We suggest that ice sheet disintegration is a highly nonlinear process and poses a danger of rapid sea level rise.

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).

ITM I am predicting that if wastewaters are cleaned up as suggested then the rest of this hurricane season will be a fizzer and the Arctic ice levels in Jan 09 will reach right up to the long term average level.

Several studies (e.g. the one quoted by the correspondent) suggest smaller ice sheets and correspondingly a sea level several meters higher than the present.

The corresponding future temperatures in Greenland are comparable to those inferred for the last interglacial period 125,000 years ago, when paleoclimatic information suggests reductions of polar land ice extent and 4 to 6 m of sea level rise.

If all of the currently available carbon resources — estimated to be around 10,000 gigatons — were burned, the Antarctic Ice Sheet would melt entirely and trigger a global sea - level rise of more than 50 meters, a new long - term modeling study suggests.

• Dynamical processes related to ice flow not included in current models but suggested by recent observations could increase the vulnerability of the ice sheets to warming, increasing future sea level rise.

Should the ice sheet start to melt in a serious way (i.e. much more significantly than current indications suggest), then lowering of the elevation of the ice sheet will induce more melting simply because of the effect of the lapse rate (air being warmer closer to sea level due to pressure effects).

Actual and projected emission levels are already at the high end of Hansen's «alternative scenario» which was suggested as an achievable outcome (based on significant control efforts) that kept forcings (including Co2, CH4 and black carbon) below a level that Hansen considered would be «dangerous» (specifically a level that would avoid the melting of any significant fraction of the WAIS or Greenland ice sheet).

The reasonable agreement in recent years between the observed rate of sea level rise and the sum of thermal expansion and loss of land ice suggests an upper limit for the magnitude of change in land - based water storage, which is relatively poorly known.

The Royal Society report includes references to Clark et al, 2016 in Nature Climate Change, suggesting the final sea level rise on millennia timescale caused by anthropogenic climate change (partly depending on future emissions) lies in a range between 29 to 55 metres and to DeConto & Pollard, 2016 in Nature, a study suggesting hydro - fracturing and ice cliff collapse around Antarctic ice sheets increases high end projection for sea level rise by 2100 to ± 2 metres.

The GRACE observations over Antarctica suggest a near - zero change due to combined ice and solid earth mass redistribution; the magnitude of our GIA correction is substantially smaller than previous models have suggested and hence we produce a systematically lower estimate of ice mass change from GRACE data: we estimate that Antarctica has lost 69 ± 18 Gigatonnes per year (Gt / yr) into the oceans over 2002 - 2010 — equivalent to +0.19 mm / yr globally - averaged sea level change, or about 6 % of the sea - level change during that period.

Data on greenhouse gas abundances going back beyond a million years, that is, beyond the reach of antarctic ice cores, are still rather uncertain, but analysis of geological samples suggests that the warm ice - free periods coincide with high atmospheric CO2 levels.

Their findings, published in Society's journal Weather, show for the first time that asperitas is a low level cloud made of water — not ice as previously suggested — which develops its characteristic form from atmospheric disturbances, such as weather fronts and storms.

While the conditions in the geological past are useful indicators in suggesting climate and atmospheric conditions only vary within a a certain range (for example, that life has existed for over 3 billion years indicates that the oxygen level of the atmosphere has stayed between about 20 and 25 % throughout that time), I also think some skeptics are too quick to suggest the lack of correlation between temperature and CO2 during the last 550 million years falsifies the link between CO2 and warming (too many differences in conditions to allow any such a conclusion to be drawn — for example the Ordovician with high CO2 and an ice age didn't have any terrestrial life).

Some estimates suggest that if Antarctica's ice sheet melts completely, it would raise sea levels by over 200 feet — enough to flood the planet's land masses.

Moreover, recent studies suggest that ice sheet loss is accelerating and that future dynamics and instability could contribute significantly to sea level rise this century.

Recent work has suggested that rapid retreat is already underway for sections of the West Antarctic ice sheet, raising the possibility of increasing contributions to sea - level rise.