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I keep thinking about the heat waves, air conditioners, and the prisoner's dilemma the world is in today.

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Interesting and educational explanation of heat waves. But the suggested climate change impact doesn't seem to fit the historical data. One easily accessible measure of June heat intensity is Cooling Degree Days (cumulative monthly difference of daily average temp from 65F). Looking at Brazos County, TX from 1895-2022, there is not a climate change signal.

https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/time-series/TX-041/cdd/1/6/1895-2023?base_prd=true&begbaseyear=1901&endbaseyear=2000

There is a weakly positive but statistically insignificant relationship between CO2 concentration and June Cooling Degree Days in Brazos County. (t=1.19). For sure, there have been some hot Junes in the past few 10 years or so, but there were similarly hot Junes back in the early 1900s, according to NOAA data.

It's the same with Maximum Temperature. No relationships between June Max temps in Brazos County and atmospheric CO2 concentrations.

https://www.ncei.noaa.gov/access/monitoring/climate-at-a-glance/county/time-series/TX-041/tmax/1/6/1895-2023?base_prd=true&begbaseyear=1901&endbaseyear=2000

Is there a better metric of heat waves over the past 125 years that demonstrates the climate change signal?

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