News tagged with ice sheet

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Late Cretaceous Period was likely ice-free

For years, scientists have thought that a continental ice sheet formed during the Late Cretaceous Period more than 90 million years ago when the climate was much warmer than it is today. Now, a University ...

Sep 24, 2013
4.3 / 5 (18) 3 | with audio podcast

Tackling an Ice Age mystery

In the northern hemisphere, ice sheets ebb and flow in 100,000-year cycles, driven by varying amounts of sunlight falling on Earth's surface as its orbit and orientation toward the sun changes. But astronomical variations ...

Sep 05, 2013
4.8 / 5 (5) 0

The paradox of polar ice sheet formation solved

The beginning of the last glacial period was characterized in the Northern hemisphere by major accumulation of snow at high latitudes and the formation of a huge polar ice sheet. For climatologists this was ...

Sep 01, 2013
4.4 / 5 (13) 0 | with audio podcast