Sunday, June 20, 2021
Temperature Measurement Timeline calls into question long term claims
Joseph D’Aleo here
Introduction
Virtually every month and year we see reports that proclaim the global data among the warmest in the entire record back to 1895 or earlier. But the efforts to assess changes to the climate are very young and beset with many issues.
The first truly global effort to measure atmospheric temperatures began with the help of satellite infrared sensing in 1979.
The first U.S. station based data set and monthly analysis was launched in the late 1980s and for the global in 1992. These datasets are products of simulation models and data assimilation software, not solely real data.
One of the key issues is Spatial Bias - the density of observation stations varied greatly on the global scale. Dr. Mototaka Nakamura in his book “Confessions of a climate scientist: the global warming hypothesis is an unproven hypothesis” writes that over the last 100 years “only 5 percent of the Earth’s area is able show the mean surface temperature with any certain degree of confidence. “A far more serious issue with calculating ‘the global mean surface temperature trend’ is the acute spatial bias in the observation stations. There is nothing they can do about this either. No matter what they do with the simulation models and data assimilation programs, this spatial bias before 1980 cannot be dealt with in any meaningful way.”
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