johnu, on 2018-August-21, 00:04, said:
If by accurate analysis you mean throwing out 99.7% of the temperature records to only consider only a single annual high temperature per reporting spot, I disagree 99.8% that this is accurate analysis.
I think you are overreacting a bit. Average temperatures are increasing, and have been doing so for the better part of two centuries. But just because the average is increasing, does not mean that every aspect of the temperature record is increasing. Perhaps a little science lesson is needed.
Global warming theory is based on the radiative absoption properties of greenhouse gases. These gases will absorb infrared radiation from solar and terrestrial sources and re-radiate in all directions. The wavelength of the IR radiation is dependent on the temperature of the irradiating object, and the absorption is based on the characteristic bands of the individual gases (yes, I am a chemist too). Many of the absorption bands are more intense in the lower temperature, higher wavelength regions in which the Earth emits. Hence absorption is greater at night than during the day. This gets accentuated during the winter months, when night is longer than the day, and amplified closer to the poles. During the winter months, the nighttime warming overwhelms daytime cooling, and warmer daytime temperatures occur also (the days warm less, but start at a higher temperature). During the summer months, the daytime absorption increases and in the high latitudes exceeds the nighttime absorption, resulting in cooler temperatures. This is seen in the Arctic temperature record whereby average winter temperatures have risen by 5C or more, while summer temperatures have decreased slightly.
http://ocean.dmi.dk/...meant80n.uk.php
In some areas of the midlatitudes, daytime cooling can exceed nighttime warming, resulting in decreased summer averages. In other areas, nighttime warming is enough to cause an increase in the summer average temperature. Most of the U.S. has experienced a decrease in the number of hot days (defined by the epa as greater than the 95th percentile).
https://www.epa.gov/...ow-temperatures
There is no need to throw out 99.7% of the temperature records, just because summertime highs are not increasing.