Melanie Mallon wrote a new post, Bad Chart Thursday: The “Realistic” Scale of Climate Change Denial, on the site Skepchick 8 months, 2 weeks ago
To deny climate change in 2019, in the face of overwhelming evidence and the effects of climate change manifesting all around us, requires either a high level of ignorance and scientific illiteracy or sociopathic […]
It took me a while to figure out your 2nd point, about including global averages way outside the habitable range, until I realized what Moore’s inadequately described chart is actually showing. It took a very close look to discover all the bars didn’t begin at 0, but somewhere very close to 0. The tops of each bar are not the global average temperature each year, but the highest local average temperature somewhere, where? He doesn’t say. And it is probably wrong. And the bottom of each bar isn’t 0, it’s the lowest average temperature (somewhere?) Probably also incorrect.
We can only assume the vertical scale is in degrees F, since he doesn’t say. Doesn’t he know that F goes negative? Zero isn’t the coldest possible temperature. He should h ave made the scale go to -60F, since he extends it to +120 F, or about 60 degrees above the top of the average bar. Much better, from his perspective, would have been to make the vertical axis in Kelvin, starting at 0. Then all the bars would be between 273 and 287, about 5% of the chart’s vertical size, and all the year-to-year variation would be about 1 pixel. But he didn’t do that because he is a moron.
The chart should really be what I recently found out is called a whisker chart. Each year should have a very thin line running from the lowest regional average temperature to the highest, with a much fatter middle section encompassing the standard deviation (about 2/3’s of the sites would be in the fat section), with a line connecting the averages for each year. The vertical scale should accommodate the lowest and highest points and not much more. But he wouldn’t do that because it wouldn’t support his point. That chart would show the average temperature increasing exponentially and the thick part (not the extremes) following suit.
I’m sure this graph is available on some climate change web site, but Google is not my friend today. No matter how I ask, it keeps wanting to show me snowfall averages in Burlington VT (a mere 200 miles away, but certainly not local to me and definitely ignoring the entire concepts of “global” and “temperature”. Feh!