The study concludes that the current downward trend in sea ice has no precedent in duration or scale of
ice loss since 1850.
Not exact matches
This has continued ever
since and is responsible for the
ice loss we are observing today and over the last few decades.»
Aerial mapping of Kilimanjaro's summit in February 2000 revealed a 33 %
loss of
ice since the last map in 1989 and an 82 % decline
since 1912, says geologist Lonnie Thompson of Ohio State University's Byrd Polar Research Center in Columbus.
Since 2003 the GRACE satellites had measured
ice loss through variations in the earth's gravitation but only at the fuzzy resolution of hundreds of kilometers.
Scientific observations show that in the Arctic, warming temperatures have led to a 75 %
loss in sea
ice volume
since the 1980s, and recent reports suggest the Arctic Ocean will be nearly free of summer sea
ice by 2050, said Sullivan.
The new results reveal that the pattern of modern
ice loss is similar to that which has prevailed
since the end of the last
ice age.
Totten Glacier, one of East Antarctica's largest ocean outlets, is already thinning — an ominous sign,
since this single glacier drains enough
ice to raise the sea level more than all of West Antarctica's
ice loss would.
Increased melting of the Greenland
Ice Sheet and other ice losses worldwide have helped to move the North Pole several centimeters east each year since 2
Ice Sheet and other
ice losses worldwide have helped to move the North Pole several centimeters east each year since 2
ice losses worldwide have helped to move the North Pole several centimeters east each year
since 2005
Since 1979, winter sea
ice extent has decreased 3.2 percent per decade (the
loss is much more pronounced in summer at a rate of 13.4 percent per decade).
The continued swings in the Arctic Oscillation can make it difficult for climate scientists to determine how sea
ice loss is altering winter weather,
since there is so much natural variability in the system in the first place.
But from an email conversation with Francis, Vavrus, and several other atmospheric scientists this week, it became clear that there may be more questions than answers at this point, given the large amount of natural variability that affects winter weather patterns, and the very short observational record of how the atmosphere responded to extreme
losses of sea
ice (only five winters of records
since 2007).
This increase in demand — up 58 %
since 2009 — combined with antiquated infrastructure has resulted in an increasing number of brownouts and blackouts, such as the one resulting from the 2013
ice storm that caused 27 deaths,
loss of power to over a million residents and more than $ 200 million in damages.
Remember that Rochester renters insurance covers
losses due to weight of snow and
ice, which is important
since the city roughly shares a latitude with Detroit and Milwaukee, and has the sort of winters you would expect given that fact!
The increase in demand — up 58 %
since 2009 — combined by antiquated infrastructure has resulted in an increasing number of brownouts and blackouts, such as the 2013
ice storm / power outage that resulted 27 deaths,
loss of power to over a million residents and over $ 200 million in damages.
And
since you have missed this acceleration you have assumed that the rate will remain at 3.3 mm / year for the rest of this century, despite ongoing observations of increases in
ice mass
loss in Greenland and parts of Antarctica.
However, if the
loss of Arctic Sea
ice has significantly changed global atmospheric circulation patterns, then we are dealing with a different system that has only been in existence
since 2007, and we do not know how often to expect crop failures.
Since the actual
loss of
ice is similar in magnitude to this figure, I conclude that a 1 watt / sq meter forcing is «big enough» to produce the melting actually seen, whereas geothermal energy is much too small.
Although a recent downward trend in coverage is clearly visible by naked eye inspection, Goddard invites us to believe there has ``... been no net gain or
loss of polar sea
ice since records began.»
2) What relevance are small areas of open water in 2000 (or earlier) given the
loss of over 2million km ^ 2 perrenial
ice since then * (on a 3.6 M km ^ 2 baseline)?
Here's an interesting thought for the
ice experts, maybe Andy could pick this up,
since he's done a very decent job of following up on my question: I've read suggestions that increased sea emissivity from the Arctic waters would gain relative to the
loss of albedo from increasingly
ice - free seas.
Mercer further commented that the
loss of
ice shelves on the Antarctic Peninsula, as has
since been observed, would be an indicator that this process of
ice sheet
loss due to global warming was underway.
So we see a long term trend of accelerating
ice mass
loss since the 1970s.
The long term trend
since the 1970s is accelerating
ice mass
loss.
Since 2008,
ice loss from West Antarctica's unstable glaciers doubled from an average annual
loss of 121 billion tons of
ice to twice that by 2014, the researchers found.
The ongoing flux of mantle material into areas which have experienced large - scale
ice - mass
loss since the LGM looks like mass gain to GRACE.
That conclusion seems much closer to reality but may be unwelcome in some circles
since the implication is that, if true and with SLR now at 3.4 mm / annum,
loss of land - based
ice must be considerably greater than hitherto reported.
Monckton stated that «a largely unreported gain in Antarctic sea
ice since 1979 almost matches the widely reported
loss of Arctic sea
ice».
The one exception to this pattern of accelerating
ice loss is Antarctic sea
ice which has shown long term growth
since satellites began measurements in 1979.
Because the inflow of warm water has been waning
since the late 1990s, it suggested that accelerated
loss of
ice would soon wane as well.
What is unclear here is the period on which the «normal statistics» is computed,
since the past data are obviously much less known, with a considerable
loss of variance (the «constant»
ice minima are obviously wrong).
Ainley believed the DuDu colony had been unable to recover
since 1980 because global warming had caused a thinning of the sea
ice resulting in a premature
loss of sea
ice that was drowning chicks.
-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.
Everyone talks about the Arctic
ice loss and deep ocean warming, and the ocean surface not warming, but the land has warmed by nearly a degree
since 1980, without pause, and we live on land but neglect trying to explain this.
This week in the journal Nature, Csatho writes a «News and Views» analysis that comments on the latest research in this area: A new study in Nature by Kristian K. Kjeldsen, Niels J. Korsgaard, Kurt H. Kjær and colleagues, who used aerial photographs, remote - sensing observations and geological evidence to estimate the Greenland
Ice Sheet's mass
loss during three time periods
since the start of the 20th century: 1900 - 83, 1983 to 2003 and 2003 - 10.
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.
It is arguably one of the most advanced of the seven in its impacts, with a 2011 GRL report putting its warming effect as equivalent to around 30 % of atmospheric anthro - CO2, and the recent report putting albedo
loss from arctic sea -
ice decline
since»79 as providing a forcing equivalent on average to that from 25 % of the anthro - CO2 levels during the period.
No it doesn't, it just shows that beyond a certain threshold sea
ice loss has been self limiting
since 2007.
This is extreme wishful thinking on their part
since recent research finds black soot as being the major factor for polar sea
ice loss.
A lack of insulating sea
ice vastly increases energy
loss since open water loses much more energy by convection and latent heat
loss.
Most have barely a clue as to the actual rate of increase in MSL or the %
loss of the Antarctic
Ice Sheet or the actual temperature increase
since the 1860 or 1978.
«But
since the 1960's the mountain has seen more even
loss of
ice in shaded and sun - exposed
ice,» he said.
So I wonder
since it is all quiet about this year's
ice volumes that possibly the avg arctic
ice volume has recovered most of the 5500 gigatonnes of avg
loss since 1979.
This work showed that the rate of
ice loss in Antarctica has doubled
since 2010, when compared to the period from 2005 to 2010.
Air temps in arctic are almost precisely the same as the average for the past 50 years — So it is unlikely air temps have created
ice loss — BUT CONVERSELY — the increased open arctic water SHOULD be affecting the arctic air temp - but is not (large expanses of 1 degree C arctic water make it difficult for air temps to drop to minus ten C — but
since that is what is happening, then in fact there must be much more cold air around to create «normal» arctic temps for this time of the year)
Since this effect would not depend on slow rates of thermal diffusion though frozen sediments, but instead by a simple
loss of
ice, which could occur more quickly, such hydrates might be more vulnerable to destabilization than hydrates buried under permafrost.
And the decline has accelerated, becoming far more dramatic,
since about the year 2000, leading to annual average sea
ice loss of around three million square kilometers.
The Sierra Nevada's mountain peaks have risen measurably
since 2012 as the Earth's crust rebounds from the net
loss of 63 trillion gallons of water — an amount equivalent to the entire annual
ice melt of the Greenland Ice She
ice melt of the Greenland
Ice She
Ice Sheet.
What the report says about Alaskan glaciers and climate change: The collective
ice mass of all Arctic glaciers has decreased every year
since 1984, with significant
losses in Alaska.
He figured that
since humans are mostly made of water, all we have to do to fix the
loss of land - based
ice is to offset it with a much larger human population.
The very small change in ocean water temperatures
since sea
ice measurements began in 1979 does not match with gains (or
losses) in any season, not from Sept (Arctic sea
ice minimum) over through winter to March - April sea
ice maximums.