Update
for Global Sea Ice Area spiral for Jan 31 2017.
Not exact matches
We have much better — and more conclusive — evidence
for climate change from more boring sources like
global temperature averages, or the extent of
global sea ice, or thousands of years» worth of C02 levels stored frozen in
ice cores.
According to the Center
for Remote Sensing of
Ice Sheets (CReSIS), an NSF Science and Technology Center led by the University of Kansas, the melt from Greenland's ice sheet contributes to global sea level rise at a rate of 0.52 millimeters annual
Ice Sheets (CReSIS), an NSF Science and Technology Center led by the University of Kansas, the melt from Greenland's
ice sheet contributes to global sea level rise at a rate of 0.52 millimeters annual
ice sheet contributes to
global sea level rise at a rate of 0.52 millimeters annually.
Oceanography postgraduates,
for example, might study how coastal dynamics affect amphibious warfare, or how decreasing polar
sea ice might influence
global climate patterns.
GREENLAND lost 1500 cubic kilometres of
ice between 2000 and 2008, making it responsible
for one - sixth of
global sea - level rise.
Scientists from Rice University and Texas A&M University - Corpus Christi's Harte Research Institute
for Gulf of Mexico Studies have discovered that Earth's
sea level did not rise steadily but rather in sharp, punctuated bursts when the planet's glaciers melted during the period of
global warming at the close of the last
ice age.
«If our results are representative, then
sea ice plays a greater role than expected, and we should take this into account in future
global CO2 budgets,» says Dorte Haubjerg Søgaard, PhD Fellow, Nordic Center
for Earth Evolution, University of Southern Denmark and the Greenland Institute of Natural Resources, Nuuk.
Whereas most studies look to the last 150 years of instrumental data and compare it to projections
for the next few centuries, we looked back 20,000 years using recently collected carbon dioxide,
global temperature and
sea level data spanning the last
ice age.
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.
«
Global warming «pause» may last
for 20 more years, and Arctic
sea ice has already started to recover,» the Daily Mail says.
Your feature on uneven
global distribution of
sea level rise as
ice sheets melt highlights a double whammy
for northern...
Interior Secretary Dirk Kempthorne, however, made clear several times during a press conference announcing the department's decision that, despite his acknowledgement that the polar bear's
sea ice habitat is melting due to
global warming, the ESA will not be used as a tool
for trying to regulate the greenhouse gas emissions blamed
for creating climate change.
It could lead to a massive increase in the rate of
ice sheet melt, with direct consequences
for global sea level rise.»
In a study published in the actual volume of Nature Communications, geo - and climate researchers at the Alfred - Wegener Institute, Helmholtz Centre
for Polar - and Marine Research (AWI) show that, in the course of our planet's history, summertime
sea ice was to be found in the central Arctic in periods characterised by higher
global temperatures — but less CO2 — than today.
The grim bottom line (
for those emerging from recently melted
ice caves): Bring carbon dioxide emissions under control within the next few years or face serious consequences, including rising
sea levels, reduced agricultural productivity and a
global economic downturn.
Global warming has caused big problems
for polar bears, which depend on
sea ice for access to the ocean so they can hunt seals and other prey.
A graph showing
global sea ice levels hitting unprecedented lows
for this time of year has caused a social media storm.
It's a research approach new to glaciology that could lead to more accurate predictions
for ice - mass loss and
global sea - level rise.
(This status allowed the Administration to create a special rule exempting greenhouse gas emissions — which are, through
global warming, melting the artic
sea ice used by the polar bears
for hunting — from regulation under the Endangered Species Act.)
That's bad news
for global sea levels as well as would - be
ice dwellers.
The
sea ice in the Arctic is considered a critical element in climate processes, and a valuable early - warning system
for global warming.
The consequences of
global sea level rise could be even scarier than the worst - case scenarios predicted by the dominant climate models, which don't fully account
for the fast breakup of
ice sheets and glaciers, NASA scientists said today (Aug. 26) at a press briefing.
The Greenland
ice sheet is thought to be one of the largest contributors to
global sea level rise over the past 20 years, accounting
for 0.5 millimeters of the current total of 3.2 millimeters of
sea level rise per year.
Current projections of
global sea level rise do not account
for the complicated behavior of these giant
ice slabs as they interact with the atmosphere, the ocean and the land.
The Nature article comes as climate scientists published what they said today was the «best ever» collection of evidence
for global warming, including temperature over land, at
sea and in the higher atmosphere, along with records of humidity,
sea - level rise, and melting
ice.
Scientists naturally suspect
global warming is responsible
for both Antarctica's surprising increase and the Arctic's long - term dwindling of
sea ice.
As of January 17,
for instance, the
global extent (area) of
sea ice is at its smallest point in potentially thousands of years.
Reinhard was awarded
for his work in investigating how the potential disintegration of Antarctic floating
ice shelves could contribute to increased
ice flow from inland glaciers, and a resulting rise in
global sea levels.
Drews was awarded
for his work in investigating how the potential disintegration of Antarctic floating
ice shelves could contribute to increased
ice flow from inland glaciers, and a resulting rise in
global sea levels [5].
«
Sea ice status now; projection
for rest of melt season, implications to extreme weather events and
global food supply.»
During glaciation, water was taken from the oceans to form the
ice at high latitudes, thus
global sea level drops by about 120 meters, exposing the continental shelves and forming land - bridges between land - masses
for animals to migrate.
This study links a framework
for global and local
sea - level rise projections with simulations of two major mechanisms by which climate change can affect the vast Antarctic
ice sheet.
This implies that large - scale observations —
for example, of
global mean
sea - level change or of the change mass of the Antarctic
ice sheet — will not on their own significantly narrow the range of late - century
sea - level projections
for decades to come.
Global warming induced by increasing CO2 will cause ice to melt and hence sea level to rise as the global volume of ice moves toward the quasi-equilibrium amount that exists for a given global temperature
Global warming induced by increasing CO2 will cause
ice to melt and hence
sea level to rise as the
global volume of ice moves toward the quasi-equilibrium amount that exists for a given global temperature
global volume of
ice moves toward the quasi-equilibrium amount that exists
for a given
global temperature
global temperature [53].
Thus the entire 3 — 4 meters of
global sea level contained in that
ice sheet may be vulnerable to rapid disintegration, although arguments
for stability of even this marine
ice sheet have been made [94].
«Environmental scientists have been saying
for some time that the
global economy is being slowly undermined by environmental trends of human origin, including shrinking forests, expanding deserts, falling water tables, eroding soils, collapsing fisheries, rising temperatures, melting
ice, rising
seas, and increasingly destructive storms,» 6.
For three particular mismatches —
sea ice loss rates being much too low in CMIP3, tropical MSU - TMT rising too fast in CMIP5, or the ensemble mean
global mean temperatures diverging from HadCRUT4 — it is likely that there are multiple sources of these mismatches across all three categories described above.
The implications of considering Arctic
sea -
ice - free conditions
for the transformation of the
global energy system are severe.
knowing that, all things being equal, el ninos coming and going big or small, forest fires coming and going,
sea ice melting ongoing, permafrost melting ongoing then that 410 ppm number
for global climate forcing will very soon, in weeks or months, come back and never go lower again.
due to co2 we are already living in a greenhouse.Whatever one does in that greenhouse will remain in the greenhouse.INDUSTRIOUS HEAT will remain in the greenhouse instead of escaping into outer space; this is a far greater contributor to
global warming than other factors and far more difficult to reduce without reducing economic activity.Like warm moist air from your mouth on cold mornings so melting antarctic
ice will turn into cloud as it meets warm moist air from tropics the
seas will not rise as antarctica is a huge cloud generator.A thick band of cloud around the earth will produce even temps accross the whole earth causing the wind to moderate even stop.WE should be preparing
for this possible scenario»
While methane is short - lived, all it has to do is shift the
global energy balance
for a while, to trigger irreversible loss of tundra methane, loss of Arctic
sea ice cover and more calthrate loss, then loss of
ice sheets and everything else Hansen et al promise.
With error bars provided, we can use the PIOMAS
ice volume time series as a proxy record
for reality and compare it against
sea -
ice simulations in
global climate models.
And that is the most hopeful positive spin I can muster atm, given that CO2 ppm and
Global SSTs and Arctic
Sea Ice are all Proxies
for Climate Change Impacts now and ongoing.
Global climate model projections (in CMIP3 at least) appear to underestimate
sea ice extent losses with respect to observations, though this is not universally true
for all models and some of them actually have ensemble spreads that are compatible with PIOMAS
ice volume estimates and satellite observations of
sea ice extent.
Mike's work, like that of previous award winners, is diverse, and includes pioneering and highly cited work in time series analysis (an elegant use of Thomson's multitaper spectral analysis approach to detect spatiotemporal oscillations in the climate record and methods
for smoothing temporal data), decadal climate variability (the term «Atlantic Multidecadal Oscillation» or «AMO» was coined by Mike in an interview with Science's Richard Kerr about a paper he had published with Tom Delworth of GFDL showing evidence in both climate model simulations and observational data
for a 50 - 70 year oscillation in the climate system; significantly Mike also published work with Kerry Emanuel in 2006 showing that the AMO concept has been overstated as regards its role in 20th century tropical Atlantic SST changes, a finding recently reaffirmed by a study published in Nature), in showing how changes in radiative forcing from volcanoes can affect ENSO, in examining the role of solar variations in explaining the pattern of the Medieval Climate Anomaly and Little
Ice Age, the relationship between the climate changes of past centuries and phenomena such as Atlantic tropical cyclones and
global sea level, and even a bit of work in atmospheric chemistry (an analysis of beryllium - 7 measurements).
But the same paucity of
ice, which Arctic climate specialists say is driven increasingly by
global greenhouse warming, has made it easy
for an enormous bulk carrier, the MV Nordic Barents, to achieve a new feat of northern navigation — carrying more than 40,000 tons of concentrated iron ore from Kirkenes, Norway, along the Northern
Sea Route over Russia and, as of yesterday, out of the Arctic Ocean on its way to a Chinese port.
The first web page also has a link to
global sea ice extent, and that shows that it is at a record low
for the this day of the year, and has been very low
for most of the year.
I've been criticized by some environmentalists in recent years
for writing that the long - term picture (more CO2 = warmer world = less
ice = higher
seas and lots of climatic and ecological changes) is the only aspect of human - caused
global warming that is solidly established, and that efforts to link dramatic weather - related events to the human influence on climate could backfire should nature wiggle the other way
for awhile.
Thus, articles that link the loss of Arctic
sea ice to
global warming are acceptable, and any news article on Arctic
sea ice will generally touch on the role of
global warming — usually with a mention
for polar bears, which are indeed cute (not too cuddly, tho).
I can't wait
for the explanations when that happens — as in that movie «The Day After,» in which it is revealed that
global warming actually leads to an
ice age because the Gulf Stream gets re-routed and no longer warms the North
Sea.