Dr. @MichaelEMann
may well be the most hated scientist in conservative America, especially for his peer-reviewed studies, including "THE GRAPH," which upsets their deep devotion to climate denialism.
https://factcheck.afp.com/doc.afp.com.32KW973
Video falsely claims scientists exaggerated 'hockey stick' climate chart

A speaker in a video viewed hundreds of thousands of times on social media claims scientists removed data from a graph to exaggerate global warming. This is false; the chart includes global data that make regional warming stand out less, and such periods do not disprove human-caused climate change.

Fact Check
@MichaelEMann Nice ... my first 100 ⭐ for a post on Matodon
@GeraldKutney @MichaelEMann can anyone explain to me why the mediaeval warm period isn't warmer than the preceding years?
@pucky @GeraldKutney @MichaelEMann The graph shows average global temp but so-called medieval warm period was not a global phenomenon.

@pucky @GeraldKutney @MichaelEMann

It was warmer in some areas, mostly in the North Atlantic, cooler in others, and cooler as a global average.

There’s a good explainer here:
https://skepticalscience.com/medieval-warm-period.htm

How does the Medieval Warm Period compare to current global temperatures?

<p>While the Medieval Warm Period saw unusually warm temperatures in some regions, globally the planet was cooler than current conditions.</p>

Skeptical Science
@GeraldKutney @pucky @MichaelEMann the article linked in the original post covers this question.
@pucky @MichaelEMann - it was a regional, not global, event.
@pucky @GeraldKutney @MichaelEMann It was a regional temperature anomaly, not a global one.
@pucky @GeraldKutney @MichaelEMann
I'll have a go as a non-expert. Two things about the Mediaeval Warm Period are a) it wasn't a global event https://doi.org/10.1038/s41586-019-1401-2 , b) the global century-on-century trend is roughly cooling since the Holocene thermal maximum 6,500 years ago, so 'warm' is not a misnomer in relation to what followed https://ncbi.nlm.nih.gov/pmc/articles/PMC6675609/. (Choice of proxies or methods may give slightly different results, but Mann et al 98 has been replicated many times since.)
@GeraldKutney @MichaelEMann Kuwae eruption stands out as being a massive event.... checking it out it appears to have been one of the largest in the last 10,000 years!
@GeraldKutney @MichaelEMann what are the temps from 100s of years ago based on?
What kinds of data do scientists use to study climate? – Climate Change: Vital Signs of the Planet

Vital Signs of the Planet: Global Climate Change and Global Warming. Current news and data streams about global warming and climate change from NASA.

Climate Change: Vital Signs of the Planet
@GeraldKutney @MichaelEMann Facts & logical argument are poor tools to sway large audiences. That’s why you don’t see commercials for the most popular restaurants consisting of nutrition or detailed service evaluations, rather short emotion based messaging & repetition always works better that’s just a fact, it perplexes me that it seems very smart people have difficulty with this at times.
Use mass marketing principles to be used to sell good science or we are doomed

@GeraldKutney @MichaelEMann

Yes.

What is it, what anybody can not understand by looking at this graph?

We do have to stop this. And soon.

This graph looks like painted with crude

#OIL

Scary scary scary

#StopFossil #KeepItInTheGround right away!

@GeraldKutney @MichaelEMann