The likely cause of climate change on a geologic time scale.

[piezoe]

Looks reasonable to me too, piezoe. I think you and Shaviv are on to something.
Here's his article you posted.
https://www.ias.edu/ideas/2015/shaviv-milky-way

Like the entire solar system is riding on a flatcar and the train is emerging from an area of fog into clearer air and so less sunlight is absorbed by the clearer surroundings so more sunlight strikes all of the planets.

Also sounds like Shaviv is saying that Cosmic Rays from universal sources not at all related to the Sun also have freer acces due to less stuff to reflect them away from the solar system so more of those bad boys are coming down to glaciers and genomes near you too.

Guy on the radio keeps records of the electrical output of his solar array and said this year is far and away the most he's ever seen. He recognizes that cloud cover weather in general, as opposed to climate make this less than scientific fact, but he's convinced nonetheless. Has to detune his setup to harvest from fewer panels so the breakers in his charging rig don't trigger as often.

Is Our Solar System Heating Up? - Search
https://duckduckgo.com/?t=ffsb&q=Is+Our+Solar+System+Heating+Up

data on Interstellar Cloud density change correlated with cosmic ray absorbtion. - Search
https://duckduckgo.com/?t=ffsb&q=da...correlated+with+cosmic+ray+absorbtion.&ia=web

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I think Shaviv and his colleagues will eventually be awarded the Nobel Prize for this work. But the politics for that to happen anytime some are not favorable. The travel of our solar system through the spiral arms of the our galaxy is in excellent agreement with the paleo temperature record but the paleo temperature record does not agree with the paleo atmospheric CO2 content. This is only one fatal flaw in the Hansen Hypothesis. I know of at least two other fatal flaws. Shaviv also has proposed a mechanism for cloud formation caused by aerosol nucleation initiated by solar atmospheric ion flux.