I don't hold faith in a line that only goes only 1/3 of the way down the chart... esspecially around the peak time spoken of, which there were no accurate records to begin with, therefore is all interpretation..... for people who like to believe in scientists, you sure like to believe in things they can't prove 1000 years ago.
... an interpretation that any scentist based on his opinion can nudge up or down for whatever reason to prove their case.
Might as well listen to a priest for all the good that'll do you, because that's a lot of faith on something that can not be proven.
That "Mediaval Warm Period" could have been a little more toasty then what we think.... don't forget, humans had it more rough back then, and therefore probably didn't bicker about the heat like we do now with our fancy air conditioning
and that's why I'll interpret it any way I damn well please, just as you do..... just like why many scientists are split on it as well today.