Scientists Find Peak 1940s Warmth, Post-1950s Cooling In The Same Western US Region Where Hockey Sticks Emerged

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A new 1735-2015 temperature reconstruction (Heeter et al., 2020) using Western US tree ring proxies shows peak 1940s warmth and post-1950s cooling. This is the same region Dr. Michael Mann used tree ring data to construct his famous hockey stick graph.

Image Source: Heeter et al., 2020

A new Scandinavian temperature reconstruction (Seftigen et al., 2020) that’s “skillfull in characterizing past temperature changes over the past one to two millennia” finds there’s been no net warming in Greta’s home country (Sweden) in the last 212 years.

Image Source: Seftigen et al., 2020



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3 responses to “Scientists Find Peak 1940s Warmth, Post-1950s Cooling In The Same Western US Region Where Hockey Sticks Emerged”

  1. John F Hultquist

    The phrasing of the USA “Dust Bowl” episode is a little shaky. The weather problems extended to a much larger area than mentioned in the first few paragraphs, and included serious wind events and cold temperatures. Further, farmers and the economic aspect {world wheat market} were important in the degradation of the land.
    That said, the temperature reconstructions – USA & Sweden – are interesting but not impressive. [r=0.34 to r=0.48]

  2. Scientists Find Peak 1940s Warmth, Post-1950s Cooling In The Same Western US Region Where Hockey Sticks Emerged | Un hobby...

    […] by K. Richard, Sep 24, 2020 in NoTricksZone […]

  3. Jonas

    You left out this from the image caption: ”… Data have been high-pass filtered and normalized to z-scores over the entire record length.”
    This tells me that any long term trend has been filtered out.
    So, there is no proof of any temperature trend (in any direction) in that graph.

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