[freebeard]

www.netzerowatch.com: New study confirms Sun/Cosmic-Ray climate connection

The observational data indicate that the Earth absorbs almost 2 Watts per square metre additional energy within 4 to 6 days of the cosmic-ray minimum. Such a large effect is a major surprise since the general consensus of the climate community, recently expressed in the 2021 released IPCC report AR6 (chapter 7.3.4.5), is that, “… the GCR [galactic cosmic rays] effect on CCN [cloud condensation nuclei] is too weak to have any detectable effect on climate and no robust association was found between GCR and cloudiness. … There is high confidence that GCRs contribute a negligible ERF [effective radiative forcing] over the period 1750 to 2019.”

These new results show the IPCC’s conclusion will need to be reassessed. Two Watts per square metre can be compared with the IPCC report’s estimate of solar effective radiative forcing over the period 1750 to 2019 of only 0.01 Watts per square metre (obtained by only considering solar irradiance changes).

“We now have simultaneous observations of decreases cosmic rays, aerosols, clouds, and the energy budget” says professor Nir Shaviv.

The solar effects in this study are too short-lived to have a lasting effect on the climate, but they point the way to research that could uncover how the mechanism works on longer time scales. “It could be that the effect of carbon dioxide in the atmosphere – the so-called climate sensitivity – might be smaller than is deduced from climate models when this effect is taken into account,” adds professor Svensmark.

So even IPCC 6 needs updating. ....because new information has come to light, man.