We were trying to figure out how the high-latitude continents could have been as warm as they were. Fossil evidence indicates that dinosaurs back then were wandering Antarctica! Geological evidence suggests that greenhouse gas concentrations were higher than modern levels by perhaps a factor of four or more—enough to account for the overall extent of apparent global warmth at the time.
Wednesday, February 08, 2012
Mann suggests that four times current CO2 levels made it warm enough for dinosaurs to wander Antarctica
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3 comments:
Isnt Antarctica like thousands of thousands of feet of ice and thats it??
"The discovery of coal seams full of the fossil remains of tropical plants and animals in Antarctica has led us to conclude that Antarctica was not close to the pole at the time these sediments were laid down"
http://books.google.co.uk/books?id=uY79k7Nx-egC&pg=PA556&lpg=PA556&dq=antarctica+%22not+close+to+the+pole%22&source=bl&ots=-7P2_keW43&sig=b16B-nLno17Z6lbyLEBbst2Nxsg&hl=en&sa=X&ei=gS4zT7-nNKOh0QW-z6GQAg&redir_esc=y#v=onepage&q=antarctica%20%22not%20close%20to%20the%20pole%22&f=false
Of course, a more obvious explanation is that Antarctica was further north back then.
http://jan.ucc.nau.edu/~rcb7/150moll.jpg
(Late Jurassic 150Ma)
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