I am reproducing the post below, as I think it is interesting in that it involves a discussion between myself and a reader of the blog. I would welcome any other readers comments.
posted by Derek Tipp at 07:30 on 16-Sep-2021
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- I.Walker said…
I’m struggling to follow your logic.
The IPCC report says "Human-induced global warming has already caused multiple observed changes in the climate system (high confidence). Changes include increases in both land and ocean temperatures, as well as more frequent heatwaves in most land regions (high confidence). There is also (high confidence) global warming has resulted in an increase in the frequency and duration of marine heatwaves. Further, there is substantial evidence that human-induced global warming has led to an increase in the frequency, intensity and/or amount of heavy precipitation events at the global scale (medium confidence), as well as an increased risk of drought in the Mediterranean region (medium confidence)."
This appears to contradict your opinion that there is no emergency. Are you contesting the credibility of the IPCC’s report?
17 September 2021 at 17:38
Derek Tipp said…
As I wrote, the global rise in temperature caused by humans is only about 0.5 degrees C. The rest is natural, so is it credible that this tiny change could cause the changes in climate being claimed? Also note that 1850 was the end of the Little Ice Age. If we go back to the Medieval Warm Period, there is good evidence that temperatures were warmer than today. For example Greenland was able to have a human settlement which farmed the land. It was then vacated as temperatures dropped. At several locations evidence of forests have been found beneath the retreating glaciers which have been dated as only a thousand years old. Again indicating higher temperatures within that time span. What you need to note is that the IPCC is a political organisation, not an independent scientific body. What we have is a man-made emergency driven by political expediency
17 September 2021 at 21:30
- I.Walker said…
The IPCC’s role is to analyse the science, they use levels of ‘confidence’ not shape it to a political ideology. In any case, NASA also agrees with the conclusions (that the rise in temperature is driven by man, not nature), as do most scientists. To suggest that the temperature rise is normal puts your opinion in opposing to mainstream scientific understanding. What qualification or credible source do you use to justify this position, other than your personal, subjective opinion?
1 October 2021 at 16:57
Derek Tipp said…
The IPCC’s role is to identify and quantify the human role in changing the climate, which, unsurprisingly it does. – If it did not then it would not be justifying its existence. There can be no doubt that this subject has now become a highly political one and it is quite impossible to separate the science from the politics. The actual science proving that the temperature rise is mainly down to CO2 is very weak, as there are many other factors that are simply not understood. For example the role of clouds. Research into this is simply ignored because it throws doubt over the whole CO2 driven hypothesis. My views are shared by a number of highly qualified experts on the subject. You need to read more widely on the subject and get informed on the very credible alternative hypotheses. Have a look at the Global Warming Policy Foundation website.
14 October 2021 at 11:38
via climate science
October 14, 2021 at 05:58AM