Massive hole reopens in Antarctic sea ice

A mysterious, massive hole, as large as Lake Superior or the State of Maine, has recently been spotted in the winter sea ice cover around Antarctica. This opening, known as a polynya, is the largest observed in the Weddell ...

Rising oceans - too late to turn the tide?

Melting ice sheets contributed much more to rising sea levels than thermal expansion of warming ocean waters during the Last Interglacial Period, a UA-led team of researchers has found. The results further suggest that ocean ...

Scientists identify climate 'tipping points'

An international team of scientists have identified potential 'tipping points' where abrupt regional climate shifts could occur due to global warming,

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