Author Archives: jpenhall

About jpenhall

I am a keen birder and have devoted my life especially since retirement to a study of the world's birds. But I was also a professor, with thirty years experience of both carrying out and evaluating research.But I detest shoddy research. Thus I reject almost wholly the propaganda of the IPCC and its minions

John Penhallurick’s Blog 14. The Truth about Glaciers


The IPCC and its supporters claim that one of the major effects of global emissions is to cause glaciers to retreat, with the clear implication that if we don’t drastically reduce our emissions of CO2,they will disappear. No-one can forget … Continue reading

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John Penhallurick’s Blog 2 Evidence from past climate change


Evidence from past climate change The IPCC and its supporters seem to assume that the climate showed no change prior to the advent of the industrial age in Europe. The authors and supporters of the notorious “Hockey Stick” version of … Continue reading

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John Penhallurick’s Blog 13:The sun is the major factor in climate change


The sun is the major factor in climate change It’s the sun, stupid! The mention of solar irradiance points to another major failing of climate models: that they totally ignore the sun, which is the source of over 99% of … Continue reading

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John Penhallurick’s Blog 11:The truth about Arctic Ice


Can human emissions of Carbon Dioxide be blamed for the retreat of Arctic Ice? The retreat of Arctic Ice has been one of the signature claims from the The IPCC and its supporters, and was a major feature of that … Continue reading

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John Penhallurick’s Blog 10:Evidence from ice cores


Evidence from ice cores Another significant reversal for the supporters of cuts to human emissions of CO2 has come about through more detailed analysis of ice cores from the Greenland Ice Cap, and from several stations in Antarctica. Many climate … Continue reading

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John Penhallurick’s Blog 9:CO2 is a mild greenhouse gas compared to water vapour


Evidence that CO2 is a mild greenhouse gas and that water vapour is far more important About one half of the solar energy that reaches the atmosphere’s outer limits from space actually hits the surface of the earth. The other … Continue reading

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John Penhallurick’s Blog 8: Further evidence of the lack of correlation between changes in C02 and temperature


Further evidence of lack of correlation between human emissions of CO2 and global warming The years  1929 to 1933 mark the beginning of the Great Depression. In 1929, human emissions of CO2 amounted to 1.17 Gt. By 1933, these had … Continue reading

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