Friday 28 January 2022

Climate change claims

 The UN IPCC and media daily turn out claims about the results of a rise in world temperatures. Having had about 40 years to test them I will quote both the IPCC and others in similar authority to see if the figures match the claims.

IPCC summary for policymakers 2021:


A.1.4 Globally averaged precipitation over land has likely increased since 1950, with a faster rate of increase since the 1980s (medium confidence). It is likely that human influence contributed to the pattern of observed precipitation changes since the mid-20th century.


A good start.

A.1.5 Human influence is very likely the main driver of the global retreat of glaciers since the 1990s and the decrease in Arctic sea ice area between 1979–1988 and 2010–2019 (decreases of about 40% in September and about 10% in March). There has been no significant trend in Antarctic sea ice area from 1979 to 2020 due to regionally opposing trends and large internal variability. Human influence very likely contributed to the decrease in Northern Hemisphere spring snow cover since 1950.









A.2.2 Global surface temperature has increased faster since 1970 than in any other 50-year period over at least the last 2000 years (high confidence).

It depends who and when you get it from.





There are plenty more conflicting diagrams out there from equally important sources. You decide.

A.2.4 Global mean sea level has risen faster since 1900 than over any preceding century in at least the last 3000 years (high confidence).








Seems like they hoped no one would check up on this one. As a directly measurable parameter at any time since we invented rulers, collected sea level data from tide gauges, floats and measuring poles worldwide are the most direct proxy for world temperature. It is directly connected to rising temperatures, half through expansion and half through melting land ice. Taking into account the variations between different estimates, the only common factor here is that the IPCC claim is wrong, as the sea level rises feet in a decade coming out of the regular ice age recoveries alone, and clearly far more than the period quoted by the IPCC from the diagrams.

A.3 Human-induced climate change is already affecting many weather and climate extremes in every region across the globe. Evidence of observed changes in extremes such as heatwaves, heavy precipitation, droughts, and tropical cyclones, and, in particular, their attribution to human influence, has strengthened since AR5.

In fact two of these claims are fairly new. Hurricanes and tornados were not expected to increase until this report, and as they actually haven't it makes you wonder why they have now lumped them in with all the other extremes.





A.3.4 It is likely that the global proportion of major (Category 3–5) tropical cyclone occurrence has increased over the last four decades 



Maybe a visit to Specsavers is required.

A.3.5 Human influence has likely increased the chance of compound extreme events18 since the 1950s. This includes increases in the frequency of concurrent heatwaves and droughts on the global scale (high confidence), fire weather in some regions of all inhabited continents (medium confidence), and compound flooding in some locations (medium confidence).










There isn't much available on floods, but as we found the rainfall was indeed increasing then this would follow. But the others, not so much.






2 comments:

  1. The political authors of the IPCC "Summary for Policy Makers" openly and intentionally omit the multiple uncertainties and plentiful disclaimers that are contained in the data and reports from the IPCC "working groups". The summary's projections of doom and gloom and assignment of blame to Man for all catastrophes are not predictions based on facts but are projections based on "scenarios" that have been created with computer models that are known not to be accurate. The IPCC gives themselves permission to present their "evidence" in this manner because the Media today is as much a failure to journalism as the IPCC is a failure to science. Both have become nothing more than propaganda arms of the socialist party of America.

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  2. Thank you. Oddly many of their earlier reports actually disagreed with some of the shriller claims of the politicians, yet although anyone could easily do the same as I did and check it up it all went on trust. It can't last for ever, the system was all built on quicksand.

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