by C. Morrison, Nov 24, 2022 in ClimateChangeDispatch
The widespread use of regularly adjusted global and local surface temperature datasets showing increasingly implausible rates of warming has been dealt a further blow with new groundbreaking research that shows 50% less warming over 50 years across the eastern United States.
The research attempts to remove distortions caused by increasing urban heat and uses human-made structure density data over 50 years supplied by the Landsat satellites. [bold, links added]
The 50% reduction in the warming trend is in comparison with the official National Oceanic and Atmospheric Administration (NOAA) homogenized surface temperature dataset.
The research was compiled by two atmospheric scientists at the University of Alabama in Huntsville, Dr. Roy Spencer and Professor John Christy.
They used a dataset of urbanization changes called ‘Built-Up’ to determine the average effect that urbanization has had on surface temperatures.
Urbanization differences were compared to temperature differences from closely spaced weather stations. The temperature plotted was in the morning during the summertime.
A full methodology of the project is shown here in a posting on Dr. Spencer’s blog.
Dr. Spencer believes that the ‘Built-Up’ dataset, which extends back to the 1970s, will be useful in ‘de-urbanizing’ land-based surface temperature measurements in the U.S. as well as other countries.
All the major global datasets use temperature measurements from the Integrated Surface Database (ISD), and all have undertaken retrospective upward adjustments in the recent past.
In the U.K., the Met Office removed a ‘pause’ in global temperatures from 1998 to around 2010 by two significant adjustments to its HadCRUT database over the last 10 years.
The adjustments added about 30% warming to the recent record. Removing the recent adjustments would bring the surface datasets more in line with the accurate measurements made by satellites and meteorological balloons.
Of course, if the objective is to promote a command-and-control Net Zero project using widespread fear of rising temperatures to mandate huge societal and economic changes, a little extra warming would appear useful.
But warming on a global scale started to run out of steam over 20 years ago, and the stunt can only be pulled for so long before the disconnect with reality becomes too obvious.
There is a danger that the integrity of the surface measurements will be put on the line. Earlier this year, two top atmospheric scientists, Emeritus Professors William Happer and Richard Lindzen told a U.S. Government inquiry that “climate science is awash with manipulated data, which provides no reliable scientific evidence.”