This report explains how this is happening in practice with the proxy for CO2 levels using plant stomata, which are small openings in leaves to take in the essential CO2. Science seems to be being corrupted to conform to a politically driven hypothesis.
This small specific group of trees did not act like the rest of the trees in their stomata count. The science has been falsely accused of cheating.
ReplyDeletehttps://skepticalscience.com/Mikes-Nature-trick-hide-the-decline-advanced.htm
There are a number of misconceptions regarding 'hide the decline':
The "decline" does not refer to a "decline in global temperature" as often claimed. It actually refers to a decline in tree growth at certain high-latitude locations. This decline began in the 1960s when tree-ring proxies diverged from the temperature record.
"Mike's Nature trick" has nothing to do with "hide the decline". "Mike's trick" refers to a technique by Michael Mann to plot instrumental temperature data on the same graph as reconstructed data over the past millennium.
The divergence of tree-ring proxies from temperatures after 1960 is openly discussed in the peer-reviewed literature and the last two IPCC assessment reports.
Ignoring inconvenient data is cheating!
ReplyDeleteIt wasn't ignored. The tree ring proxie was for unknown reasons was not responding to the atmospheric level of co2 in a certain time period. Where as other plants and other proxie data did. This does not invalidate the entire picture.
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