December 14, 2009–Like polar bears, ringed seals (above, a newborn rests in the snows of Nunavut, Canada) depend on summer sea ice in the Arctic for their survival. No one knows what will happen to the seals and other species if polar summer ice completely disappears due to global warming–which may occur in the Arctic […]
You must go back 15 million years to find carbon dioxide levels as high as they are today, Earth scientists report. “The last time carbon dioxide levels were apparently as high as they are today and sustained at those levels, global temperatures were five to 10 degrees Fahrenheit higher than they are today,” said Aradhna […]
By Noreen Parks In addition to weakening Earth’s natural shield against excessive radiation levels, ozone depletion above Antarctica has significantly dampened the Southern Ocean’s ability to absorb atmospheric CO2 and has accelerated acidification of southern polar waters, according to new research reported online June 20 in Geophysical Research Letters (2009, DOI 10.1029/2009GL038227). Of the atmospheric […]
As the cold, dry climate of the western Antarctic Peninsula becomes warmer and more humid, phytoplankton – the bottom of the Antarctic food chain – is decreasing off the northern part the peninsula and increasing further south, Rutgers marine scientists have discovered. In research to be published tomorrow in the journal Science, Martin Montes-Hugo and […]
Madrid – Antarctica’s Wilkins Ice Shelf is rapidly disintegrating, Spanish scientists reported on Tuesday, with potentially ominous implications for climate change. An ice sheet of 14,000 square kilometres has broken off from the Wilkins Shelf, and has itself broken into several large icebergs, according to a statement from Spain’s National Research Council (CSIC). CSIC scientists […]
New rifts have developed on the Wilkins Ice Shelf that could lead to the opening of the ice bridge that has been preventing the ice shelf from disintegrating and breaking away from the Antarctic Peninsula. Antarctica: Wilkins Ice Shelf Under Threat Fri, 28 Nov 2008 05:00:00 GMT Technorati Tags: Antarctic,ice shelf,global warming
By Andrew Darby, Hobart THE first evidence suggests that a predicted rise of atmospheric carbon dioxide will wreak havoc on krill, the tiny crustacean at the heart of the Antarctic food web. Although public sympathy for the crustacean is undetectable, polar life such as penguins, seals and whales would wither without it. Captive-bred krill at […]
