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.
I have followed ice news closely over the last 3 years and I am worried about
future ice loss.
This movement is important for understanding current ice loss on the continent, and predicting
future ice loss.»
Kuhn, from Germany's Alfred Wegener Institute, added, «This gives confidence in the predictions of the current generation of ice sheet models which are used to forecast
future ice loss from Antarctica and resulting sea - level rise.»
As models improved, the Fifth Assessment Report, released in 2013, was able to provide numerical estimates of
future ice loss but still based on the informal judgment of a limited number of participants.
But DeConto says that Hindmarsh's work predicts
future ice loss based on what's happened so far, and doesn't take into account processes like ice surface melt that haven't kicked in yet.
This gives confidence in the predictions of the current generation of ice - sheet models which are used to forecast
future ice loss from Antarctica and resulting sea - level rise.»
Not exact matches
However, a number of studies have indicated that climate models underestimate the
loss of Arctic sea
ice, which is why the models might not be the most suitable tools to quantify the
future evolution of the
ice cover.
After two decades of rapid
ice loss, concerns are arising over how much more
ice will be lost to the ocean in the
future.
They then used the satellite record of Arctic sea
ice extent to calculate the rates of sea
ice loss and then projected those rates into the
future, to estimate how much more the sea
ice cover may shrink in approximately three polar bear generations, or 35 years.
Glaciologists worldwide use these and other maps in modeling the rate of
ice loss in Greenland and projecting
future losses.
The next step is to use estimates of
future sea
ice loss to make predictions of how further melting could influence summer rainfall in Europe in the years to come.
The researchers warn, however, that the
future evolution of the AMO remains uncertain, with many factors potentially affecting how it interacts with atmospheric circulation patterns, such as Arctic sea
ice loss, changes in solar radiation, volcanic eruptions and concentrations of greenhouse gases in the atmosphere.
Arctic sea
ice loss of the magnitude expected in the next few decades could impact California's rainfall and exacerbate
future droughts, according to new research led by Lawrence Livermore National Laboratory (LLNL) scientists.
'' [S] ea -
ice loss of the magnitude expected in the next decades could substantially impact California's precipitation, thus highlighting another mechanism by which human - caused climate change could exacerbate
future California droughts,» the study says.
Dr Ian Joughin at the University of Washington, author of a recent study simulating
future Antarctic
ice sheet
losses added: «This study does a nice job of revealing the strong thinning along the Amundsen Coast, which is consistent with theory and models indicating this region is in the early stages of collapse.»
And if
ice loss continues to accelerate in the warming Arctic, this effect may only become more pronounced in the
future.
The results highlight how the interaction between ocean conditions and the bedrock beneath a glacier can influence the frozen mass, helping scientists better predict
future Antarctica
ice loss and global sea level rise.
Here is the title: «
Future loss of Arctic sea -
ice cover could drive a substantial decrease in California's rainfall ``.
Computational models that simulate the climate such as CAM5, which is the atmosphere component of the Community Earth System Model used in the Intergovernmental Panel on Climate Change 5th Assessment, are used to predict
future climate changes, such as the Arctic sea
ice loss.
This report describes simulations of
future sea -
ice extent using the NCAR CCSM3, which point to the possible complete
loss of sea -
ice at the end of the melt season as soon as 2040.
Gladstone et al. (2012) also investigated the
future of PIG, and they too found ongoing
ice mass
loss to be likely under a «business as usual scenario» (IPCC), with full collapse of the main trunk of PIG during the 22nd century still a possibility.
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.
Judah Cohen, a climate forecaster at Atmospheric and Environmental Research in Massachusetts, who issues seasonal snowfall forecasts several months in advance for his company's clients, said the relationship between sea
ice loss and the Arctic Oscillation is a key area for
future research to focus on.
By my logic I'd apply the precautionary principle rather strongly if there was even a small chance of major effects such as near
future sea
ice loss...
After finishing my post on the inevitability of substantial long - term sea - level rise from Antarctic
ice loss, I sent this question to Curt Stager, a paleoclimatologist and author of «Deep
Future,» Kim Stanley Robinson, the novelist focused on «cli fi» before that term was conceived, and the astrobiologist David Grinspoon:
The report itself states that this
ice loss is due to a recent acceleration of flow, and that in 2005 it was already higher, and that in
future the numbers could be several times higher — or they could be lower.
This report describes simulations of
future sea -
ice extent using the NCAR CCSM3, which point to the possible complete
loss of sea -
ice at the end of the melt season as soon as 2040.
That seems questionable, as is the suggestion that some 50 % of
future SLR could come from
ice mass loss from the East Antarctic Ice She
ice mass
loss from the East Antarctic
Ice She
Ice Sheet.
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.
The available record (Fig. 2) is too brief to provide an indication of the shape of
future ice mass
loss, but the data will become extremely useful as the record lengthens.
While this is unlikely for the foreseeable
future, even a partial
loss of these huge
ice masses could have a significant effect on coastal areas.
The graph shows IPCC model runs projecting arctic sea
ice loss into the
future.
Future loss of Arctic sea -
ice cover could drive a substantial decrease in California's rainfall... — coauthored by Benjamin D. Santer
The latest published research suggests that «
ice shelves may have an important role in stabilizing the
ice sheet in Antarctica, and imply that the
future loss of the largest
ice shelves in the Antarctic could eventually cause accelerated and dramatic sea level rise,» Rapley said.
Since current
ice melt data could indicate variable climate trends and aren't necessarily part of an accelerating trend, the study warned that predictions of
future sea - level rise should not be based on measurements of glacial
loss» Daily Mail.
Future forecasts from the CESM DP indicate that we should expect a pause in decadal Atlantic winter sea
ice loss over the next 5 to 10 years.
The largest uncertainty in the
future radiative forcing caused by sea -
ice loss is related to how clouds in the Arctic will change.
Scientists embarked on a 6 - month expedition in the Arctic Ocean to study the thinning sea
ice cover, improve our understanding of sea
ice loss effects, and help predict
future changes.
«I think it's naive and presumptuous,» Taylor said, referring to a recent report by the U.S. government warning that computer models predict a dire
future for the bears due to projected
ice loss...
Furthermore, significant warming during the satellite sea surface temperature record (1982 — 2009) is mainly limited to the summer months... we speculate that Bering Sea primary productivity is likely to rise under conditions of
future warming and sea
ice loss.»
Our results stress the importance of considering
loss of sea
ice thickness in
future climate change assessments.
However, there remains uncertainty in the rate of sea
ice loss, with the models that most accurately project historical sea
ice trends currently suggesting nearly
ice - free conditions sometime between 2021 and 2043 (median 2035).12 Uncertainty across all models stems from a combination of large differences in projections among different climate models, natural climate variability, and uncertainty about
future rates of fossil fuel emissions.
Develop community - relevant scenarios of sea
ice loss, permafrost degradation, coastal erosion, and other environmental change that will affect communities into the
future.
Regardless of when icefree conditions are actually reached, it is clear that rapid Arctic sea
ice loss is already underway and will continue for the foreseeable
future.
Judah Cohen, a climate forecaster at Atmospheric and Environmental Research in Massachusetts, who issues seasonal snowfall forecasts several months in advance for his company's clients, said the relationship between sea
ice loss and the Arctic Oscillation is a key area for
future research to focus on.
Projections from climate models suggest that
ice loss will continue in the
future, with a possibility of September
ice - free conditions later this century (e.g., Stroeve et al., 2012b; Massonnet et al., 2012).
The researchers also examined 92 recent scientific papers that addressed the evidence for sea
ice loss and its impact on
future polar bear populations.
Observing - network design studies, focused on the issue of abrupt sea
ice loss, can be used to inform
future observing needs.
That paper, which was not peer - reviewed, argued that because polar bear numbers have remained relatively stable despite faster - than - expected sea
ice loss over the past decade, scientists» predictions of
future population declines are flawed.