Humlum: The State of the Climate 2025 Global and Arctic

Real observations show a slight decrease of global temperature in 2025 compared with the previous ten years. Some stations in the Arctic show warming, but most are fairly stable. The Arctic Ocean is cooling to considerable depth, while the tropical and Antarctic oceans have a slight surface warming. The sea level trend is not changing as IPCC model data indicate. The Arctic September sea ice varies but its area has the last 4 years been much larger than modelled by the IPCC. The average snow cover on the Northern Hemisphere is fairly constant during the last 50 years. The number of tropical cyclones varies, but with no clear trend. The integrated cyclonic energy shows some periodic variations, but no trend. Global precipitation has almost zero trend. The global cloud cover decreased from 64 % to 61 % from 1985 to 2020. At the same time the global temperature increased 0.7 °C, suggesting a possible relation. The observed sequence: first warming the of the sea surface, then the deeper sea, atmosphere and land suggests that the Sun is the source of warming, modulated by clouds, and there is no manmade climate catastrophe in the foreseeable future.

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