“2,000 years ago, temperatures were much higher than they are now”

11 Responses to “2,000 years ago, temperatures were much higher than they are now”

1. sfx2020 says:

   October 21, 2015 at 11:09 am

   This one is easy to hand wave away, because “since then it warmed a lot and that is no longer true”. Same for the very old tree records from the US, which show the history of climate for over 2000 years.

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2. Jeff says:

   October 21, 2015 at 11:21 am

   I really don’t think one can use tree rings as an accurate history of temperatures. That’s silly.

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   • Morgan Wright says:

     October 21, 2015 at 12:50 pm

     Not silly at all. Very accurate: http://hyzercreek.com/treering.htm

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     • jeff says:

       October 22, 2015 at 1:20 am

       Thank You. That’s very interesting.

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   • ripatheism says:

     October 21, 2015 at 1:12 pm

     It is accurate, as long as you are not the IPCC, and give huge weighting to a few trees that showed no warming in the mid-evil warm period (much warmer and longer than ours that is coming to and end), that is exactly what they did…

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3. sfx2020 says:

   October 21, 2015 at 2:39 pm

   http://hyzercreek.com/treering.htm

   The other factor for tree growth, is rainfall. But, there is also the matter of CO2.

   http://www.sciencedaily.com/releases/2010/02/100201171641.htm

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   • David A says:

     October 21, 2015 at 5:57 pm

     Rainfall, soil conditions, competion, disease,etc. Trees are not thermometers.

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     • Morgan Wright says:

       October 21, 2015 at 7:00 pm

       But regarding the tree I used there, the only thing that mattered was sunlight.

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       • darrylb says:

         October 21, 2015 at 7:24 pm

         Michael Mann used bristlecone pines, a highly long lived, and contorted tree, from high and arid regions of the US Southwest.
         He knew it was subject in growth to rainfall conditions.
         Furthermore, The bristlecones were a small and controversial subset of many proxies used.
         Even though no other proxies showed the hockey stick shape; the method used, principal components, allowed the single errant bristlecone record of over a thousand years to be the predominant shape of the hockeystick.
         Beyond that, when the graph did not show a recent warming, they truncated it and spliced in a dubious current temperature record which our host as shown to be completely suspect.
4. Billy Liar says:

   October 21, 2015 at 4:43 pm

   Well, surprisingly, given the controversial nature of his 1986 study, he’s still got a job:

   http://personal.cricyt.edu.ar/ricardo/

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   • darrylb says:

     October 21, 2015 at 7:26 pm

     I have seen four studies showing 1,000 year cycles which would coincide with the roman warm period and the medieval warm period.
     Until recent junk, records had shown them to be warmer than today.

     Reply