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Politics : View from the Center and Left
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To: Bearcatbob who wrote (70238)6/2/2008 9:44:02 PM
From: Sam  Read Replies (1) of 542009
 
In prior periods of warmer climate the earth prospered and did not end. I read yesterday about the time when England was a wine exporter in the early second millenium (Medevil Warm Period - Little Ice Age).

I still don't have time to answer this in depth myself, so I'll just point you to one answer. There are plenty of other people who have also given answers to it.

The Medieval Warm Period was just as warm as today

Objection:
It was just as warm in the Medieval Warm Period as today, in fact Greenland was green and they were growing grapes in England.

This one often comes with additional anecdotal evidence, but it is not often useful to get into those details, just refer to the wealth of proxy studies that refute this idea.

Answer:
There is actually no good evidence that the MWP was indeed a globally warm period comparable to today. Regionally, there may have been places that did exhibit notable warmth but all of the various global proxy reconstructions agree that it is warmer now and the temperature is rising faster than at any time in the last one or even two thousand years. Anecdotal evidence like that above can never tell you a global story.

NOAA presents a whole selection of proxy studies together with the data they are based on and these can be found here: ncdc.noaa.gov

Specifically, they have this to say about the MWP:

"The idea of a global or hemispheric "Medieval Warm Period" that was warmer than today however, has turned out to be incorrect."

ncdc.noaa.gov

In specific answer to the "grapes used to grow in England" bit, I like to point people here:

english-wine.com

illconsidered.blogspot.com
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