Guest essay by Larry Hamlin
The Global Warming Policy Forum (GWPF) published a comprehensive article on new U.S. EPA (Environmental Protection Agency) indicators on climate change that are supposed to serve as the basis for science-based decisions. Instead, it found that many of these indicators are misleading, misleading, incomplete, and based on selective data.
The GWPF article looked specifically at the EPA’s recent gimmicks, including their heatwave climate change indicators, which purportedly represent heat wave frequency in the US from 1961 to 2019, as shown below.
The GWPF notes that the heat wave frequency data presented by the EPA (red data on left) is misleading as it shows (without specifically identifying it) minimum and non-maximum temperatures in 50 American cities. The GWPF data (blue data on the left) shows the maximum temperatures that significantly reduce heat wave frequency from the 1960s and beyond.
Also, as noted by GWPF, the EPA data excludes the previous global cooling period from 1940 to 1970, exaggerating the warmer period that occurs after that time and more ignoring the extended and searing heat of the 1930s.
Prior to these recent changes to climate change indicators, the EPA website presented the heatwave index for the period 1895-2015 shown below (labeled under the heading “High and Low Temperatures”), which clearly showed the heatwave dominance of the 1930s period, as well as the absence increasing heatwave trends since that time.
However, in the latest updated version of the EPA, the heatwave indicators for climate change are presented in a completely revised format under the heading “Heatwaves” as follows. This heading category was not identified in the previous EPA version, with the GWPF article disclosing the deliberately and grossly misleading nature of these alleged heatwave indicators.
The pre-eminent decade of the heatwave from 1930 to 1940 was not accounted for in this final EPA amendment, and the heatwave index displayed in the previous EPA version was “de- emphasized “(disappeared) Figure 3.
The full-size Figure 3, which shows the heatwave index according to the previous EPA version, was updated from 1895 to 2020 (compared to 2015) and continues to show the period of the 1930s when the US heatwaves dominated, as well as the number of heatwave trends that have increased significantly since the 1930s.
In addition, the “Heatwave Index for High and Low Temperatures” diagram from the earlier EPA version has been replaced by the following diagram, which clearly shows hot and low daily highs as a percentage of land area from 1985 to 2020 as a dishonest attempt to hide this dominant heat wave period of the 1930s.
The GWPF article deals with the fourth U.S. climate assessment report, which includes data on both the duration of the heat wave and the average maximum temperature during a given heat wave since 1900, as shown in the graphs below. These data show that the heat wave duration has decreased 41% since the 1930s and that the average maximum heat wave temperature has decreased from 101 ° F in the 1930s to 99 ° F since the 1980s.
There are numerous temperature and heatwave climate data sources that demonstrate the dominance of the earlier periods (1930s) as being far warmer with larger heatwave intervals than the present, and that reveal the lack of credibility in the claims of climate alarmists that we experience larger numbers and higher heatwave temperatures than in the past as shown in the following data.
The GWPF article concludes with the following conclusion regarding the EPA’s efforts to mislead the public about heat waves in their recent amendments, as follows:
“All of this means that the EPA’s heatwave indicator grossly misrepresents the actual science and misses its stated goal for the indicators to “inform our understanding of climate change”.
Welcome to the Biden era of climate science bias, deception and dishonesty to fabricate political propaganda in support of scientifically unsupported climate armist mandates for Americans.