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One of the wild cards in estimating future sea level rise from global warming is the enormous East Antarctic Ice Sheet, which holds more freshwater in its icy expanse than the whole of Greenland. Some climate models predict the giant ice sheet will undergo relatively little change as the planet warms in coming decades, while others forecast significant melting. Now, a new study suggests parts of the East Antarctic Ice Sheet underwent significant melting during the Pliocene, a recent geologic epoch when climate conditions were similar to those of today. ... During the Pliocene epoch between 5.3 million to 2.6...

Earth's global thaw has reached Mount Everest, the world's tallest peak, researchers said today (May 14) at the Meeting of the Americas in Cancun, Mexico. Glaciers in the Mount Everest region have shrunk by 13 percent in the last 50 years and the snowline has shifted upward by 590 feet (180 meters), Sudeep Thakuri, a graduate student at the University of Milan in Italy, said in a statement. Located in the Himalaya Mountains on the border between China and Nepal, Everest's summit is 29,029 feet (8,848 m) above sea level. Thakuri and his colleagues tracked changes to glaciers, temperatures and...

A Glasgow-based company has installed its first commercial "alkaline hydrolysis" unit at a Florida funeral home. The unit by Resomation Ltd is billed as a green alternative to cremation and works by dissolving the body in heated alkaline water. The facility has been installed at the Anderson-McQueen funeral home in St Petersburg, and will be used for the first time in the coming weeks. It is hoped other units will follow in the US, Canada and Europe. The makers claim the process produces a third less greenhouse gas than cremation, uses a seventh of the energy, and allows for the...

STOCKHOLM (AP) -- A new assessment of climate change in the Arctic shows the ice in the region is melting faster than previously thought and sharply raises projections of global sea level rise this century. The report by the international Arctic Monitoring and Assessment Program, or AMAP, compiles the latest science on how climate change has impacted the Arctic in the past six years. A summary of the key findings obtained by the AP on Tuesday shows Arctic temperatures during that period were the highest since measurements began in 1880.

Excerpt only website: Himalayan glaciers are actually advancing rather than retreating, claims the first major study since a controversial UN report said they would be melted within quarter of a century. Researchers have discovered that contrary to popular belief half of the ice flows in the Karakoram range of the mountains are actually growing rather than shrinking. The discovery adds a new twist to the row over whether global warming is causing the world's highest mountain range to lose its ice cover. It further challenges claims made in a 2007 report by the UN's Intergovernmental Panel on Climate Change that...

PARIS (AFP) – There is no "tipping point" beyond which climate change will inevitably push the Arctic ice cap into terminal melt off, according to a study released Wednesday. The northern polar cap has shrunk between 15 and 20 percent over the last 30 years, unleashing concern that on current trends -- with regional temperature increases twice or triple the global average -- it could disappear entirely during the summer months by century's end. One of the factors in this calculation is a so-called positive feedback, in which a reduced area of floating ice helps to stoke global warming. As...

ScienceDaily (Jan. 22, 2008) — The first evidence of a volcanic eruption from beneath Antarctica's most rapidly changing ice sheet has been reported. The volcano on the West Antarctic Ice Sheet erupted 2000 years ago (325BC) and remains active. The subglacial volcano has a 'volcanic explosion index' of around 3-4. Heat from the volcano creates melt-water that lubricates the base of the ice sheet and increases the flow towards the sea. Pine Island Glacier on the West Antarctic Ice Sheet is showing rapid change and BAS scientists are part of an international research effort to understand this change.

There are many kinds of truth. Al Gore was poleaxed by an inconvenient one yesterday. The former US Vice-President, who became an unlikely figurehead for the green movement after narrating the Oscar-winning documentary An Inconvenient Truth, became entangled in a new climate change “spin” row. Mr Gore, speaking at the Copenhagen climate change summit, stated the latest research showed that the Arctic could be completely ice-free in five years. In his speech, Mr Gore told the conference: “These figures are fresh. Some of the models suggest to Dr [Wieslav] Maslowski that there is a 75 per cent chance that the...

GENEVA (AFP) – Swiss researchers have found that Alpine glaciers melting under the impact of climate change are releasing highly toxic pollutants that had been absorbed by the ice for decades. They warned in a study abstract published in the journal Environmental Science and Technology that it could have a "dire environmental impact" on "pristine mountain areas" as global warming accelerates. Much of the pollution was dumped on Europe's biggest mountain range by atmospheric currents from further afield, according to the researchers at three Swiss scientific institutes. Their study of layers of sediment from an Alpine lake formed by a...

This summer's melt of Arctic sea ice has not been as profound as in the last two years, scientists said as the ice began its annual Autumn recovery. At its smallest extent this summer, on 12 September, the ice covered 5.10 million sq km (1.97 million sq miles). This was larger than the minima seen in the last two years, and leaves 2007's record low of 4.1 million sq km (1.6 million sq miles) intact. But scientists note the long-term trend is still downwards. Arctic temperatures have been cooler this year than last year, researchers said, and winds have helped...

Nevada del Huila erupted mildly a few days ago; but a mild eruption is enough to melt glaciers on the summit and trigger lahars, as happened tragically to Armero, Colombia in 1985. This time there were warnings and the warnings were heeded. Still a mess indicative of the powers of nature: Nevado del Huila is just another Andean Peak reminiscent of Rainier, so there aren't a lot of pictures of it; the one below is pretty good.

The Arctic may get some temporary relief from global warming if the annual North American wildfire season intensifies, according to a new study by researchers at the University of Colorado and NOAA. Smoke transported to the Arctic from northern forest fires may cool the surface for several weeks to months at a time, according to the most detailed analysis yet of how smoke influences the Arctic climate relative to the amount of snow and ice cover. "Smoke in the atmosphere temporarily reduces the amount of solar radiation reaching the surface. This transitory effect could partly offset some of the warming...

Melting ice caps may trigger more volcanic eruptions 10:38 03 April 2008 NewScientist.com news service Catherine Brahic Vatnajökull in the south-east is the largest ice cap in Iceland and conceals several volcanoes (Image: NASA) A warmer world could be a more explosive one. Global warming is having a much more profound effect than just melting ice caps – it is melting magma too. Vatnajökull is the largest ice cap in Iceland, and is disappearing at a rate of 5 cubic kilometres per year. Carolina Pagli of the University of Leeds, UK, and Freysteinn Sigmundsson of the University of Iceland have...

A vast ice shelf hanging on by a thin strip looks to be the next chunk to break off from the Antarctic Peninsula, the latest sign of global warming's impact on Earth's southernmost continent. Scientists are shocked by the rapid change of events. Glaciologist Ted Scambos of the University of Colorado was monitoring satellite images of the Wilkins Ice Shelf and spotted a huge iceberg measuring 25 miles by 1.5 miles (41 kilometers by 2.5 kilometers - about 10 times the area of Manhattan) that appeared to have broken away from the shelf. Scambos alerted colleagues at the British Antarctic...

Another factor might be contributing to the thinning of some of the Antarctica's glaciers: volcanoes. In an article published Sunday on the Web site of the journal Nature Geoscience, Hugh Corr and David Vaughan of the British Antarctic Survey report the identification of a layer of volcanic ash and glass shards frozen within an ice sheet in western Antarctica. "This is the first time we have seen a volcano beneath the ice sheet punch a hole through the ice sheet" in Antarctica, Vaughan said. Volcanic heat could still be melting ice to water and contributing to thinning and speeding up...

"One such piece of evidence comes from the Defense Meteorological Satellites Program (DMSP-F13) Special Sensor Microwave/Imager (SSM/I), which records microwave energy emitted from the Earth’s surface. Because wet snow and dry snow look different in the microwave frequencies, measurements from the SSM/I tell scientists where and when the ice sheet is melting. Made from SSM/I data, this image compares the number of days melting occurred on the Greenland Ice Sheet in 2005 to the annual average number of melting days since 1988. Greenland is nearly entirely ringed in red and orange, showing that the summer melt season was much longer...

Highways, houses, industrial developments and entire neighborhoods along the San Francisco Bay will be under water if global warming causes tides to rise as much as 3 feet in the coming decades, according to new maps developed by the Bay Conservation and Development Commission. The maps, prepared for The San Francisco Chronicle, depict entirely submerged parts of residential cities such as Corte Madera, Mill Valley, Sausalito, San Rafael, Hayward and Newark. In San Francisco, the Caltrain mass transit system and an ambitious Candlestick Point redevelopment project would be vulnerable to flooding. Much of the Silicon Valley shoreline would be under...

The worrying shrinkage of Arctic sea ice could accelerate dramatically in coming decades, leaving the planet's most northerly ocean virtually devoid of ice in summer by 2040, according to a study published on Tuesday. The paper, which appeared in the US journal Geophysical Research Letters, mainly points the finger at greenhouse-gas emissions. It warned that if carbon pollution continues to increase at present rates, the Arctic's normal cycle of freezing and thawing faces catastrophic disruption. A simulation run by scientists at the National Center for Atmospheric Research (NCAR) and Canada's McGill University predicted that the area covered by ice in...

For the first time NASA scientists have analyzed data from direct, detailed satellite measurements to show that ice losses now far surpass ice gains in the shrinking Greenland ice sheet. Using a novel technique that reveals regional changes in the weight of the massive ice sheet across the entire continent, scientists at NASA's Goddard Space Flight Center, Greenbelt, Md., report that Greenland's low coastal regions lost 155 gigatons (41 cubic miles) of ice per year between 2003 and 2005 from excess melting and icebergs, while the high-elevation interior gained 54 gigatons (14 cubic miles) annually from excess snowfall. The study...

he Greenland icesheet, the second largest single store of frozen freshwater in the world, is melting faster than previous estimates, according to a study that adds to grim news about global warming. In 2001, the UN's top scientific forum on global warming projected that the thick slab of ice that covers most of Greenland would melt only slightly during the 21st century. But a study published on Thursday in the British weekly journal Nature calculates that the rate of Greenland ice loss increased by 250 percent between May 2004 and April 2006 compared with the two years between April 2002...