Unnatural Global Warming
Monday, 26. October 2009, 08:45:09
Is the current climate change simply a natural variation like others that have occurred throughout geologic time. Some people still believe it, but more and more evidence points to human beings being (at the very least partly) responsible. The current global warming is in other words not natural. There is an abbreviation for the phenomenon - AGW (anthropogenic global warming).
In a paper, titled "Recent Changes in a Remote Arctic Lake are Unique Within the Past 200,000 Years", sediments retrieved by University at Buffalo geologists from a remote Arctic lake show that recent variations are unlike those that have been seen during previous warming episodes. The environmental transformations going on in the Arctic are dramatic.
The 20th century is the only period during the past 200,000 years in which aquatic indicators reflect increased warming, despite the declining effect of slow changes in the tilt of the Earth's axis which, under natural conditions, would lead to climatic cooling.
Reference:
Recent Changes in a Remote Arctic Lake are Unique Within the Past 200,000 Years
by Axford et al.
Proceedings of the National Academy of Sciences
Published online before print October 19, 2009
doi: 10.1073/pnas.0907094106
(requires a subscription or payment of US$10.00)
In a paper, titled "Recent Changes in a Remote Arctic Lake are Unique Within the Past 200,000 Years", sediments retrieved by University at Buffalo geologists from a remote Arctic lake show that recent variations are unlike those that have been seen during previous warming episodes. The environmental transformations going on in the Arctic are dramatic.
The 20th century is the only period during the past 200,000 years in which aquatic indicators reflect increased warming, despite the declining effect of slow changes in the tilt of the Earth's axis which, under natural conditions, would lead to climatic cooling.
Reference:
Recent Changes in a Remote Arctic Lake are Unique Within the Past 200,000 Years
by Axford et al.
Proceedings of the National Academy of Sciences
Published online before print October 19, 2009
doi: 10.1073/pnas.0907094106
(requires a subscription or payment of US$10.00)
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http://www.pnas.org/content/early/2009/10/16/0907094106.abstract
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http://www.eurekalert.org/pub_releases/2009-10/uab-ass102309.php
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http://www.sciencecodex.com/arctic_sediments_show_that_20th_century_warming_is_unlike_natural_variation
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http://www.sciencedaily.com/releases/2009/10/091023163513.htm
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