Scientists in Norway gathering rock core data confirm that carbon today is being released into the atmosphere 10 times faster than a period of high temperatures 55 million years ago, as they note that the current rate may be faster than ecosystems can adapt.  

http://www.physorg.com/news/2011-06-carbon-atmosphere-ten-faster.html,  
http://content.usatoday.com/communities/greenhouse/post/2011/06/carbon-emissions-10-times-faster-climate-change/1

Canadian scientists studying lake sediment confirm that a 1999 severe storm in the Northwest Territories that brought the Arctic Ocean 20 kilometers inland, leaving a swath of salt-water destruction that has not recovered even today, was in fact an event related to global warming and an indication of things to come.

http://www.theglobeandmail.com/news/national/violent-arctic-storm-a-climate-change-harbinger-study-
finds/article2023865/
http://www2.canada.com/story.html?id=4793000