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Politics : The Environmentalist Thread
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To: Brumar89 who wrote (16622)10/2/2007 10:33:13 PM
From: neolib  Read Replies (1) of 36917
 
And "the warming takes about 5000 years". I notice the chart in Laurie's book shows warmings that clearly last much longer than 5000 years. In fact its difficult to detect movements of anything that last only 5000 years since the chart covers 650K years.

Uh?? Sounds out to lunch to me.

Go here and look at the blue line, temps. Now, notice the big upward swings which occur at about 15Kya, 130Kya, 240Kya, and 325Kya (very roughly by my eyeball!). You will note that all those rises happen rapidly on the scale of this chart, something on the order of 5K years. That is what we are talking about. The warmup, not the duration it stays warm, just in case that is your confusion. You will notice that the slide into colder temps takes a very long time compared to the warmup. Also note that the present time is on the left, not the right of this graph.

en.wikipedia.org
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