Climate

newscientist.com - by Andy Coghlan - March 25, 2014

Oil giant Exxon Mobil has promised to reveal how much of its fossil fuel reserves could become worthless if governments agree to cut greenhouse gas emissions. It is the first major fossil fuel company to declare the size of its exposure to the so-called carbon bubble – the over-valuation of fossil fuel companies that could result if their assets are left unused.

To save ourselves from the worst impacts of global warming, we have to leave fossil fuels in the ground instead of burning them.

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whatweknow.aaas.org

The overwhelming evidence of human-caused climate change documents both current impacts with significant costs and extraordinary future risks to society and natural systems. The scientific community has convened conferences, published reports, spoken out at forums and proclaimed, through statements by virtually every national scientific academy and relevant major scientific organization — including the American Association for the Advancement of Science (AAAS) — that climate change puts the well-being of people of all nations at risk.

Surveys show that many Americans think climate change is still a topic of significant scientific disagreement.i Thus, it is important and increasingly urgent for the public to know there is now a high degree of agreement among climate scientists that human-caused climate change is real. Moreover, while the public is becoming aware that climate change is increasing the likelihood of certain local disasters, many people do not yet understand that there is a small, but real chance of abrupt, unpredictable and potentially irreversible changes with highly damaging impacts on people in the United States and around the world.

Open water in northeast Greenland, where ice loss is accelerating. Photo by Finn Bo Madsen, courtesy of The Ohio State University.

All margins of ice sheet now unstable—and contributing to sea level rise

osu.edu - March 17, 2014

COLUMBUS, Ohio—An international team of scientists has discovered that the last remaining stable portion of the Greenland ice sheet is stable no more.

The finding, which will likely boost estimates of expected global sea level rise in the future, appears in the March 16 issue of the journal Nature Climate Change [DOI:10.1038/NCLIMATE2161].

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CLICK HERE - RESEARCH - Sustained mass loss of the northeast Greenland ice sheet triggered by regional warming