New Northern Hemisphere Temperature Reconstructions Are Devoid Of Michael Mann-Like Hockey Sticks

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New paleoclimate records from Europe, Scandinavia-Russia, China, and the northeastern USA indicate there has been no unusual modern warming. Instead, these newly published reconstructions show warmer periods and more rapid centennial-scale warming events occurred in past centuries, or when CO2 concentrations were much lower than they are now.

United States

In the late 1990s Dr. Michael Mann heavily weighted tree ring evidence from North American bristlecone pines to construct the notorious hockey stick temperature graph featuring a sharp uptick in modern warming.

A new 2,500-year tree ring reconstruction (411 B.C.E. to 2016 C.E.)  for the northeastern United States shows no unusual climate changes in recent decades have occurred in this region (Pearl et al., 2020). The authors suggest the tree species used, Atlantic white cedar, is “significantly correlated” with this region’s temperature.

Image Source: Pearl et al., 2020

Scandinavia, Russia

Another new dendroclimatology study (Shi et al., 2020) affirms Northern Eurasia (Sweden, Yamal) warmed 3 to 6 times faster during the 4th, 15th and 19th centuries than during the 1900s-2000s.

For example, the temperature record suggests it warmed 0.37°C to 0.85°C within the last century. During the Roman and Medieval warm periods as well as the 19th century, regional temperatures rose at much faster rates of 1.37°C to 3.31°C per century.

Further, the record shows regional temperatures were warmer during the first millennium than during the last century.

Image Source: Shi et al., 2020

China

Using ice cores, tree rings, lake sediments, and stalagmites from 28 proxy temperature reconstructions from throughout the “whole country” of China, Hao et al., (2020) find the “longest warm period on the centennial scale” occurred during the 10th to 13th centuries, or during the Medieval Warm Period (MWP).

The two warmest 30-year periods during the MWP are also “comparable” to the warmth of the most recent decades.

Image Source: Hao et al., (2020)

None of these Northern Hemisphere temperature reconstructions indicate there has been any unusual modern warming relative to the natural temperature variations of the last few millennia.




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10 responses to “New Northern Hemisphere Temperature Reconstructions Are Devoid Of Michael Mann-Like Hockey Sticks”

  1. toorightmate

    Isn’t it remarkable how these various researchers agree with the Vikings going to Iceland/Greenland when it was warm, and returning when it became cold and ice “skating” on the Thames when it was cold.
    All of these historical events took place DESPITE CO2 atmospheric concentrations..
    The CO2 horsesh*t has to stop.

  2. Zoe Phin

    You were supposed to cut off the proxies in 1960, and then glue global temperature trend to get the hockey stick. That’s how climate “science” works.

    lol. Enjoy

    http://phzoe.com/2020/04/21/the-strange-case-of-mimas/

  3. Tyrannosaurus Rex

    Hey, NTZ team. Check this out.
    https://www.nature.com/articles/s41467-019-12905-z
    https://eos.org/articles/mountain-streams-exhale-more-than-their-share-of-co2
    We really need to spread the word. We need all the evidence we can get to turn the tide.

  4. ahlam st

    We need all the evidence that will contribute to the change of direction.

  5. New Northern Hemisphere Temperature Reconstructions Are Devoid Of Michael Mann-Like Hockey Sticks — - Climate- Science.press

    […] https://notrickszone.com/2020/04/27/new-northern-hemisphere-temperature-reconstructions-are-devoid-o… By Kenneth Richard New paleoclimate records from Europe, Scandinavia-Russia, China, and the northeastern USA indicate there has been no unusual modern warming. Instead, these newly published reconstructions show warmer periods and more rapid centennial-scale warming events occurred in past centuries, or when CO2 concentrations were much lower than they are now. 6 weitere Wörter […]

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    […] New Northern Hemisphere Temperature Reconstructions Are Devoid Of Michael Mann-Like Hockey Sticks […]

  7. patrick healy

    could someone explain to this old wrinklie what Ce and Bce mean?
    Thank you.

  8. Redracam

    Great article!
    The political roots of anthropogenic climate change must be challenged:
    Al Gore’s carbon tax credits, the will of the west to curb the industrial ascent of emerging nations and the vast grants to university researchers if they juxtapose any climate change suffix to their work.
    If these memes are not challenged we will totally miss the point; how do we take care of our environment and our planet!
    People need clean water, they need clean air and they need wholesome food … guess what none of the above will actually deliver. Vested interest cannot replace consensual dialogue on the needs of humanity.

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