its so obvious mann hockey stick is baloney. Mann took thermometer records and graphed them onto proxy records... and once he graphed the thermometer records he made the current proxy temperatures disappear so that no one would realize that some of the tree ring proxies show temperature to be much lower not higher.
How do they explain the proxies show lower temps than the thermometers indicating we are not really warming.... they say the trees are broken.
here is the argument set up at skeptical science... (they then proceed to say the proxies are broken.)
Tree-rings diverge from temperature after 1960
Actual reconstructions "diverge" from the instrumental series in the last part of 20th century. For instance, in the original hockey stick (ending 1980) the last 30-40 years of data points slightly downwards. In order to smooth those time series one needs to "pad" the series beyond the end time, and no matter what method one uses, this leads to a smoothed graph pointing downwards in the end whereas the smoothed instrumental series is pointing upwards — a divergence (Climate Audit).
===
if you go to the link exthinker gave us... at skeptical science (the al gore sponsored blog by a former cartoonist) you see they made the argument there was no MWP but cut off the graph to exclude the MWP.
luckily in the comments a nice person gave us a link to this page and these graphs... showing an MWP in at least some of the ice cores..
http://www.foresight.org/nanodot/?p=3553
How do they explain the proxies show lower temps than the thermometers indicating we are not really warming.... they say the trees are broken.
here is the argument set up at skeptical science... (they then proceed to say the proxies are broken.)
Tree-rings diverge from temperature after 1960
Actual reconstructions "diverge" from the instrumental series in the last part of 20th century. For instance, in the original hockey stick (ending 1980) the last 30-40 years of data points slightly downwards. In order to smooth those time series one needs to "pad" the series beyond the end time, and no matter what method one uses, this leads to a smoothed graph pointing downwards in the end whereas the smoothed instrumental series is pointing upwards — a divergence (Climate Audit).
===
if you go to the link exthinker gave us... at skeptical science (the al gore sponsored blog by a former cartoonist) you see they made the argument there was no MWP but cut off the graph to exclude the MWP.
luckily in the comments a nice person gave us a link to this page and these graphs... showing an MWP in at least some of the ice cores..
http://www.foresight.org/nanodot/?p=3553