Night-Time Warming
The small amount of warming shown by the temperature series has been created by taking averages of readings obtained e.g. Maximum and minimum. In considering the normal variation over 24 hours compared to the tiny fractions of a degree shown by the Time Series calculated, it is necessary to consider whether the additional heat (where found) is uniform across the day, or peaks at particular times. Most obviously, is it hotter during the day when the sun is shining. Or at night when the CO2 "blanket" is stopping the night-time cooling as much as normal.
Evidence is mounting that the latter is true:-
NASA AIRS: 80% of U.S. Warming has been at Night
April 30th, 2019
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How much has urbanisation affected United Kingdom temperatures?
MAY 6, 2019
This paper finds through the method of observation minus reanalysis that urbanisation has significantly increased the daily minimum 2‐m temperature in the United Kingdom by up to 1.70 K.
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