Medieval Warm Period rehabilited Sept 5, 2009 14:06:12 GMT
Post by nautonnier on Sept 5, 2009 14:06:12 GMT
and then to:
So what do we have? We have the 1990 graph sticking out like a sore thumb.
This is not entirely surprising because the 1990 graph was based on central england temperature and was a sort of a "this is the best idea we have" kind of graph. The second one there is northern hemisphere. Therefore they really are apples and oranges. The 1990 graph did not support "relax this has happened before". The 1990 report was projecting temperature rises similar to the ones in AR4. What we see from 1990 report to AR4 is the progression of attempts to reconstruct the past 1000 years of temperature records.
SoCold - I agree with you - they are apples and oranges.
The first graph was a real attempt to show the temperature record.
The second was Mann's hockey stick which was used to scare politicians and used a statistical algorithm that turned ANY input including random noise into the hockeystick that he wanted.
You should now read www.climateaudit.org/?p=6932#comment-355268 about the way data that shows what is wanted is selected and any that is in discord is discarded. Even to the extent of inverting some data to get it to fit. You still trust these 'professional and well qualified honorable' authors?