An abrupt release of methane, a powerful greenhouse gas, from ice sheets that extended to Earth's low latitudes some 635 million years ago caused a dramatic shift in climate, scientists funded by the National Science Foundation (NSF) report in this week's issue of the journal Nature. The shift triggered events that resulted in global warming and an ending of the last "snowball" ice age.
The researchers believe that the methane was released gradually at first ...
More at http://www.nsf.gov/news/news_summ.jsp?cntn_id=111554&govDel=USNSF_51
No comments:
Post a Comment