The IPCC was set up in 1998 to prove man made global warming was dangerous. It started its mission with a conclusion. That is not science. By 1995 it had arbitrarily dismissed ALL natural causes of climate change as "noise". That means 100% of the causes of climate change for the past 4.5 billion years were dismissed with the wave of a hand.
From the first IPCC report, to the last, an IPCC ASSUMPTION that global warming was man made, rapid and dangerous was made. Not proven. Then it was used for the conclusion: Future global warming will be man made, rapid and dangerous. The circular reasoning logical fallacy!
For the 47 years since 1975, ACTUAL global warming was slow, mild and beneficial. Many colder nations in the Northern Hemisphere have warmer winter nights than they did in the 1970s. The charts below shows the locations with the most warming in the colder, higher latitude nations in the Northern Hemisphere:
Few maximum daytime temperature records were set. Few US states. for one example, have set maximum temperature records in recent decades, compared with the 1930s:
The IPCC was set up to make scary global warming predictions, and blame humans for global warming. They quote climate models programmed to make scary predictions. They encourage arbitrary historical temperature data "adjustments" to help support the scary predictions. For one example, significant (almost -0.6 degrees C.) global cooling from 1940 to 1975, as CO2 levels rose, has been arbitrarily "disappeared". Those inconvenient data did not support the CO2 narrative:
We know the average current CMIP6 model ECS is significantly higher that CMIP5 (+4.4 degrees C. per CO2 doubling, versus 3.4 degrees C. -- both estimates more than double actual warming rate since 1975 (when data mining the highest rate of warming 1975 through 2020 period, and using the worst case assumption that all warming was caused by CO2). The CMIP6 range of ECS estimates is also much higher than CMIP5, at +1.8 to +5.6 degrees C. per CO2 doubling
Only one CMIP6 model -- the Russian INM-CM -- comes close to the worst case observations (INM is predicting +1.8 degrees C. per CO2 doubling ). In general, the INM models have had higher ocean thermal inertia and more realistic ocean precipitation compared to ARGO ocean probe observations (less water vapor positive feedback amplification). The Russian INM model, that least over estimates actual global warming, gets NO individual attention. That's science fraud, and proof that accurate global average temperature predictions are NOT a goal.
The IPCC has always been a political organization. The climate models are programmed to scare people. Actual global warming is not scary. So the climate models will never be accurate. Accuracy is not their goal. In fact, they have become LESS ACCURATE , and more scary, over the past 46 years.
Why do governments want to scare people? In case you have been in a coma for the past few years: When people are scared, leftist governments seize more power, and the people let them. Sometimes encourage them. The "threat" can be real, real and grossly exaggerated (Covid 19), or even completely fake (weapons of mass destruction in Iraq, Trump - Russian collusion, and the imaginary coming global warming crisis featured at this blog).
If people believe a crisis is coming, even if it is a fake climate crisis, they can be scared into wanting MORE GOVERNMENT POWER to save them. It works every time.