Greenland

Melting glaciers contribute a third of sea-level rise

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 …

Greenland ice less vulnerable than feared to thaw: study

Greenland is less vulnerable than expected to a runaway melt that would drive up world sea levels, according to scientists who found that only a quarter of the ice sheet thawed in a warm period more than 100,000 years ago. The study, involving 300 experts from 14 nations, implied that …

Rise in sea level due to melting ice sheets higher than estimated

London: Rise in sea levels in the future due to the melting of the Greenland and Antarctic ice sheets could be substantially larger than IPCC estimates, according to a new first-of-its-kind study. Researchers from the University of Bristol found that the future rise in sea levels predicted by the Fourth …

Evidence for man-made climate change getting stronger: U.N.

Evidence that global warming is man-made is getting stronger, the head of a U.N. panel of climate scientists said, in a further blow to skeptics who argue rising temperatures can be explained by natural variations. Rajendra Pachauri spoke on the sidelines of a conference in Qatar where 200 nations are …

Polar Ice-sheet melting jumps three-fold: NASA

NEW DELHI: The combined rate of melting for the ice sheets covering Greenland and Antarctica has increased during the last 20 years says a landmark study published Thursday in the journal Science. The study was carried out by an international team of 47 experts from 26 laboratories supported by NASA …

Arctic report card 2012

The Arctic Report Card considers a wide range of environmental observations throughout the Arctic, and is updated annually. A major finding of the Report Card 2012 is that numerous record-setting melting events occurred, even though, with the exception of a few limited episodes, Arctic-wide it was an unremarkable year, relative …

Rapid coupling between ice volume and polar temperature over the past 150,000 years

Current global warming necessitates a detailed understanding of the relationships between climate and global ice volume. Highly resolved and continuous sea-level records are essential for quantifying ice-volume changes. However, an unbiased study of the timing of past ice-volume changes, relative to polar climate change, has so far been impossible because …

Seas rising faster than projected, low areas threatened: Report

Sea levels are rising 60% faster than UN projections, threatening low-lying areas from Miami to the Maldives, a study said on Wednesday. The report, issued during UN talks in Qatar on combating climate change, also said temperatures were creeping higher in line with UN scenarios, rejecting hopes the rate had …

Every year, Greenland is losing 200m tonnes of ice

Sat Photos Reveal Alarming Trend Washington: Greenland is losing an average of 200 million tonnes of ice every year since 2003, which could have a big impact on sea levels, scientists claim. The latest analysis by scientists studying the changing mass of the island using satellite data backs the previously …

Greenland ice-sheet contribution to sea-level rise buffered by meltwater storage in firn

Surface melt on the Greenland ice sheet has shown increasing trends in areal extent and duration since the beginning of the satellite era. Records for melt were broken in 2005, 2007, 2010 and 2012. Much of the increased surface melt is occurring in the percolation zone, a region of the …

Research reveals why sea levels are rising faster than previously feared

Sea levels are rising faster than expected from global warming and new research is said to reveal the reasons why. The last official IPCC report in 2007 projected a global sea level rise between 0.2 and 0.5 meters by the year 2100. But current sea-level rise measurements meet or exceed …

Arctic sea ice may vanish in 10 years

Due To Global Warming, Meltdown Is 50% Faster Than Estimates: Experts London: Arctic sea ice could vanish within 10 years as it is melting much faster than previously believed, thanks to global warming, warn scientists, claiming that the process is 50% faster than the current estimates. Preliminary results from the …

Greenland loses ice in fits and starts

The surge of ice loss from Greenland between 2005 and 2010, which drove up sea levels around the world, was not unprecedented. A similar spurt happened in the late 1980s, and possibly decades earlier as well.

97% of Greenland surface ice turns to slush

The surface of Greenland has turned to slush. Satellite data shows that a warm spell earlier this month melted nearly the entire surface of the nation's ice cap. The melt is unusual: normally about half of the ice sheet melts at the surface during summer, mostly at low elevations.

Greenland ice said more resistant to climate change than feared

"It is too early to proclaim the 'ice sheet's future doom'" caused by climate change, lead author Kurt Kjaer of the University of Copenhagen wrote in a statement of the findings in Friday's edition of the journal Science. An examination of old photos taken from planes revealed a sharp thinning …

Massive Greenland surface ice cover melt picked up by satellites

Greenland's surface ice cover melted this month over a larger area than ever detected in more than 30 years of satellite observations, NASA said recently. According to measurements from three separate satellites analyzed by NASA and university scientists, an estimated 97 per cent of the ice sheet surface thawed at …

Bedrock displacements in Greenland manifest ice mass variations, climate cycles and climate change

The Greenland GPS Network (GNET) uses the Global Positioning System (GPS) to measure the displacement of bedrock exposed near the margins of the Greenland ice sheet. The entire network is uplifting in response to past and present-day changes in ice mass. Crustal displacement is largely accounted for by an annual …

“Indication of global warming”

A massive iceberg — twice the size of Manhattan — has broken off of a glacier in Greenland, according to NASA satellite imagery, in what could be the latest indication of global warming. The images released on Wednesday show the massive chunk of ice breaking off of the Petermann Glacier …

Uncovering an ocean

Much of the change in the Arctic is understood; little of it is reassuring . NY-ALESUND IS a special place in Arctic science. A huddle of wooden buildings by an icy fjord on Norway's island of Spitsbergen, high in the Barents Sea, it is the world's most northerly civilian settlement. …

Rising sea levels threaten coasts

Is India’s thirst for fresh water causing ocean levels to rise? Experts warn that the backwaters of Kerala and the deltas of the Ganga, Krishna, Godavari, Cauvery and Mahanadi on the east coast are being threatened by rising ocean levels. A recent Nasa study had confirmed that water tables in …

Greenhouse gas levels pass symbolic 400ppm CO2 milestone

Monitoring stations in the Arctic detect record levels of carbon dioxide, higher than ever above 'safe' 350ppm mark The world's air has reached what scientists call a troubling new milestone for carbon dioxide, the main global warming pollutant. Monitoring stations across the Arctic this spring are measuring more than 400 …

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