Real-World Observations Do Not Support The Position That Climate Change Is Human-Caused

By Kenneth Richard on 25. May 2026

According to a recent presentation by climate scientist Dr. Ole Humlum published in Science of Climate Change:

Real-world observations show both cooling and warming trends in the Arctic, Antarctic, and Tropical oceans since ARGO monitoring was introduced in 2004.

Real-world observations show no trend in global precipitation since 1979.

Real-world observations show global cloud cover decline since 1985. A decline in cloud albedo means more solar radiation can be absorbed by the surface. Thus, the decline in cloud cover can easily explain the warming of the last 40 years.

Image Source: Humlum, 2026

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Milo

May 25, 2026 2:09 pm

Also less air pollution over much of land and sea surface, despite more over China and India.

Rud Istvan

May 25, 2026 2:20 pm

And the explanatory modest decline in cloud cover since ~1985 is easily causally further explained just by reduction in sulfate aerosols (which are cloud nucleating agents) from better coal fired generation pollution control—even in China (India is still a problem).
None of which is in IPCC climate models, because their clouds have to be parameterized thanks to the CFL computational constraint.

gyan1

May 25, 2026 2:49 pm

The tiny human forcing is dwarfed by natural variability. That will determine future climate change as it has throughout Earth’s geologic history.

Chris Hanley

May 25, 2026 2:59 pm

Real-World Observations Do Not Support The Position That Climate Change Is Human-Caused

The heading is ambiguous, Prof Humlum states that “there is no manmade climate catastrophe in the foreseeable future” and that CO2 “is not overly important to understanding meteorology and climate.”
He does not claim that human greenhouse gas emissions have no effect as the heading implies.

Victor

May 25, 2026 3:02 pm

If carbon dioxide affects the climate, which climate zone is most affected by carbon dioxide?
Is the climate most affected in the climate zone where the sun’s heat radiation is highest?
Or is the climate most affected in the climate zone where the sun’s heat radiation is lowest?

The Earth’s temperature change is least in the temperate / tropical climate zone and greatest in the Northern Hemisphere. Are these temperature changes consistent with the alleged effect of carbon dioxide on the Earth’s climate?