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Sea levels

How Much Will Sea Levels Rise – And When?

Written by , on January 24, 2013

Researchers at the UK's National Oceanography Centre in Southampton have found that greenhouse gas concentrations similar to the present have been associated with sea levels at least nine metres above current levels. The researchers compiled more than two thousand pairs of CO2 and sea level data points, spanning critical periods within the last 40 million […]  Read more »

More Accurate Measures of Melting Icecaps

Written by , on February 15, 2012

U.S. scientists using satellite data have established a more accurate figure of the amount of annual sea level rise from melting glaciers and ice caps. There are more than 160,000 glaciers and ice caps worldwide but annual changes in mass have been directly measured for only 120 of them and, in most cases, only within […]  Read more »

New Research Estimates Larger Sea Level Rise

Written by , on May 9, 2011

In 2007, the IPCC projected a maximum sea level rise of 59 centimetres by 2100. The IPCC acknowledged that this was likely to be an under-estimate because understanding of the processes happening on ice sheets was inadequate to enable reliable estimates to be made. A team of researchers led by Eric Rignot from Nasa’s Jet […]  Read more »

Greenland Ice Sheet Not Slipping into the Sea

Written by , on January 27, 2011

Until now, it had been thought that melting ice could form a slippy layer at the bottonm of the Greenland ice sheet causing it to slide rapidly into the sea. Now, a study by Professor Andrew Shepherd of the University of Leeds, has shown that this is not happening. Professor Shepherd’s team used satellite imagery […]  Read more »

Estimated Rate of Greenland Ice Melt Halved

Written by , on September 8, 2010

There have been several estimates that Greenland is shedding roughly 230 billion tonnes of ice and West Antarctica around 132  billion tonnes per year and analysts have been concerned that these rates are much faster than predicted by climate models – suggesting that the models may be far too conservative. Now researchers from the US […]  Read more »

Coral Isands May Be Shifting – Not Sinking

Written by , on June 17, 2010

For years, we have been warned that low-lying coral island states will be drowned by rising sea levels. Now the first analysis of the data broadly suggests the opposite – most have remained stable, while some have even grown, despite rising sea levels, over the last 60 years. Nanumea Atoll, Tuvalu (NASA image) Paul Kench […]  Read more »

Rising Seas and Tuvalu

Written by , on May 20, 2008

There have been many claims that the Pacific Island nation of Tuvalu is drowning because of rising seas resulting from climate change. Tuvalu is a group of nine small islands with a total area of 26 square kilometres and a population of about 12,000. Its average height above sea level is just 3 metres. Tuvalu […]  Read more »

Sea Level Rise

Written by , on May 20, 2008

It is certainly true that sea levels are rising – they have been for the last 18,000 years. Since the peak of the last ice age 18.000 years ago, seas have risen by 130 metres. During the current interglacial period, sea levels were at their highest about 140,000 years ago when they were briefly 6 […]  Read more »