Friday 17 May 2019





Between 1300 and 1850, the Earth experienced a Little Ice Age whose cause to this day is not known.

During the period 950 CE to 1250 CE, the earth experienced an unusually warm period, which became known as the Medieval Warm Period (MWP) or the Medieval Climatic Anomaly. At their height, temperatures during that period were similar to those experienced during earth's mid-20th-century warming period.

See
https://interestingengineering.com/the-little-ice-age-what-happened-around-the-world?https://interestingengineering.com/the-little-ice-age-what-happened-around-the-world?




Monitoring how well Climate Predictions do "Worries Greens"


"“The United States reaffirms its commitment to re-examine comprehensive modeling that best reflects the actual state of climate science in order to inform its policy-making decisions, including comparing actual monitored climate data against the modeled climate trajectories on an on-going basis,” says the U.S. portion of the communiqué.
 
Greens who follow the G-7 process were dismayed. […]"

Tuesday 7 May 2019


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.