The rise in surface air temperatures in southern Africa over the past two decades may be due to the loss of upper atmospheric ozone over Antarctica, reports a paper published online this week in Nature Geoscience. The findings suggest that the closure of the Antarctic ozone hole could lead to a reduction in surface air temperatures in (more…)
A massive chunk of Antarctica’s fastest-moving ice stream, the Pine Island Glacier, dropped into the Amundsen Sea this week, nearly two years after scientists first observed a crack in the glacier tongue.
German scientists, who have been tracking the progress of the ice mass since NASA satellites first (more…)
It is cold down in Antarctica. And to drill into the ice one needs lot of heat. In December 2012 a team of British scientists, engineers and support staff, led by Professor Martin Siegert of the University of Bristol, planned to drill through 3km of solid ice into subglacial Lake Ellsworth in Antarctica. Their mission is to search for life forms in the water and clues to past climate in (more…)
According to a new NASA-funded study, Greenland and Antarctic ice sheets are losing mass at a much faster rate than previous model forecasts have predicted. The study, the longest of its kind—almost 20 years—used satellites to measure changes in polar ice sheet mass. Results suggest that the ice sheets, found only in Antarctica and Greenland, are melting (more…)
There are many earth cycles. One is a cycling between warmer and colder periods which are commonly called ice ages. The causes of these cycles are complex and are related to how much sun radiation we get as well as some slight variation in the sun itself. Scientists have recently found a possible source of a huge carbon dioxide burp that happened some 18,000 years ago and which helped to end the last ice age. (more…)