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To: palmer
There was no corresponding temperature rise 500 to 1000 years ago to produce that CO2 rise.

Apparently you are getting your information and possibly charts from sources which have been making valiant attempts to write the “Medieval Warm Period” out of existence. There is ample evidence that the Warm Period that lasted from around 950 until approximately the Maunder Minimum that started around 1675 was much more than a local event.

19 posted on 01/19/2020 8:41:08 AM PST by fireman15
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To: fireman15
I agree there was a global Medieval Warm Period. The revisionists claim that it was local, e.g. northern Europe only. They do the same thing with the Little Ice Age. But assuming that MWP was global and about 1C or so, that would result in a total of 5-10 ppm rise in CO2 with many centuries of lag. That means about 5-10 ppm of the recent/current rise in CO2 comes from the MWP.

But the current rise is 2-3 ppm per year. That means it has a different source than the MWP, or in other words, only a small portion of that 2-3 ppm per year is a lagging effect of the MWP.

22 posted on 01/19/2020 8:48:27 AM PST by palmer (Democracy Dies Six Ways to Sunday)
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