Last January, a study in Nature Climate Change showed the world's glaciers are the smallest they've been in human history, revealing radiocarbon material that hasn't been exposed for 40,000 years. Now, new research published in Nature quantifies how much the world's lost glaciers have contributed to rising sea levels. From …
geology Climate change in ice age Greenland ice core analysis showed drastic climate change near the end of last ice age. Scientists have found two huge temperature spikes in the Northern Hemisphere prior to the close of the last ice age, about 11,500 years ago. They ascribe it to fundamental …
Listening to the earth scientists at the Tallberg Forum speaking about the likely calamities caused by global warming, I had the sensation of entering a parallel universe. It is a universe where an adaptive and inventive human race has grown to over six billion people, created bountiful and rich civilisations …
Could the oil crisis be triggered by images of Greenland's crumbling ice cap? Project Syndicate : Could the television image we've all seen of the Greenland ice cap crumbling into the ocean because of global warming somehow - indirectly and psychologically
Continuous Global Positioning System observations reveal rapid and large ice velocity fluctuations in the western ablation zone of the Greenland Ice Sheet. Within days, ice velocity reacts to increased meltwater production and increases by a factor of 4. Such a response is much stronger and much faster than previously reported. …
New data from Greenland shows that the UN's dire warnings on global warming may be vastly understated------- In 1990, when climatologist Konrad Steffen established Swiss Camp, one of the first automatic weather stations on Greenland's ice sheet, global warming wasn't high on his agenda. Steffen's aim was to begin filling …
The response of the Greenland ice sheet to global warming is a source of concern notably because of its potential contribution to changes in the sea level. We demonstrated the natural vulnerability of the ice sheet by using pollen records from marine sediment off southwest Greenland that indicate important changes …
Five Arctic coastal nations agreed on Wednesday to let the UN rule on conflicting territorial claims on the region's seabed, which may hold up to one fourth of the world's undiscovered hydrocarbon reserves. "We affirmed our commitment to the orderly settlement of any possible overlapping claims," US Deputy Secretary of …
Officials from five Arctic coastal countries will meet in Greenland this week to discuss how to carve up the Arctic Ocean, which could hold up to one-quarter of the world's undiscovered oil and gas reserves. Canada, Denmark, Norway, Russia and the United States are squabbling over much of the Arctic …
It has been widely hypothesized that a warmer climate in Greenland would increase the volume of lubricating surface meltwater reaching the ice-bedrock interface, accelerating ice flow and increasing mass loss. We have assembled a data set that provides a synoptic-scale view, spanning ice-sheet to outlet-glacier flow, with which to evaluate …
Subglacial water can significantly affect the velocity of ice streams and outlet glaciers of ice sheets. Depending on the geometry and capacity of the subglacial hydrologic system, increased surface melting in Greenland over the coming decades may influence the ice sheet's mass balance. Furthermore, subglacial lakes in Antarctica can modulate …
Almost 6 years ago, a paper in Science warned of an unheralded environmental peril. Melted snow and ice seemed to be reaching the base of the great Greenland ice sheet, lubricating it and accelerating the sheet's slide toward oblivion in the sea, where it was raising sea level worldwide (12 …
When people talk about catastrophic climate change, there's a fair chance that Greenland is on their mind. If they use the term 'tipping point', then it is pretty much a sure thing. One-twentieth of the world's ice is locked up atop that island, and if it were to melt completely, …
This report presents a wide-ranging review of arctic climate impact science. It spans the width of subject areas, covering impacts on physical and biological systems, as well as on humanity. The report presents the scientific evidence for arctic climate change impacts in review sections, each of which targets a particular …
Attaching a 'floating' tree-ring chronology to ice core records that cover the abrupt Younger Dryas cold interval during the last glacial termination provides a better estimate of the onset and duration of the radiocarbon anomaly. The chronology suggests that marine records may be biased by changes in the concentration of …
Because of difficulties in creating a radiocarbon calibration that covers the end of the last glaciation, defining the timing and duration of the Younger Dryas cold event has been a challenge. Linking related cosmogenic isotopes in tree rings and ice cores may provide new insights into abrupt climate changes.
The Arctic reflects what ails a world gripped by global warming. As the ice melts and nations vie for rich mineral resources once hidden under the snow, the writing on the wall is often ignored, says Fatima Chowdhury Thousands of miles away in the Arctic region, fate stands delicately balanced …
so far climate change study models have ignored how carbon emissions contributed to the melting of glaciers. This was not part of climate study models since reliable data on soot emissions was absent. There was, however, evidence for the glacial melt in the Arctic due to the black carbon emissions …
It is difficult to obtain fossil data from the 10% of Earth's terrestrial surface that is covered by thick glaciers and ice sheets, and hence, knowledge of the paleoenvironments of these regions has remained limited. We show that DNA and amino acids from buried organisms can be recovered from the …
