| By TickTock,
on 03-05-2008 16:01
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Published in : News, Latest News |
New research is beginning to show that the IPCC may be conservative in its estimates on sea level rises. Some scientists are even now thinking that the IPCC is to slow to respond to new evidence.
1.5 metre rise - This is currently proposed by a group of scientists led by Svetlana Jevrejeva at the Proudman Oceanographic Laboratory . The evidence of a 1.5m rise by 2100 was given at the European Geosciences Union last month.
6 metre rise - The New Scientist reports that researchers from the Wood Hole Oceanographic Institute witnessed a large lake drain through a crack in the Greenland ice, a complete melting of the Greenland ice sheet could increase sea levels by 6 metres.
60 metre rise - (Also mentioned in the New Scientist). Such a rise would require all the earths ice to melt. This may sound impossible, however a report submitted to Science magazine indicates that it may well happen. The authors of the research headed by James Hansen have looked at CO2 records dating back 50 million years and have shown we may be just a few decades from a major tipping point. They have found that the earths Antarctic formed its ice cap at a point when CO2 in the atmosphere was about 425ppm, back then CO2 was on it's way down. Today it is on it's way up, the implication being that we could see large amounts of ice melting soon. Why? Because in 20 years or so we will reach the 425ppm mark.
The report is currently held at Cornell University. Cite: arXiv:0804.1126v1 [physics.ao-ph]
James Hansen article for TruthOut
Last update : 04-05-2008 07:02
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Hansen Presentation
By: ticktock (Registered) on 23-06-2008 19:47