“Global warming clearly is a problem, though not in the catastrophic terms of Al Gore’s movies or environmental alarmists,” said Shaviv. “Climate change has existed forever and is unlikely to go away. But CO2 emissions don’t play the major role. Periodic solar activity does.”
The link between solar activity and the heating and cooling of the earth is indirect, he explained. When the Sun is more active, there is a rise in sea level here on earth. Higher temperature makes water expand. When the Sun is less active, temperature goes down and the sea level falls.
Galactic Cosmic Rays are a mixture of high-energy photons and sub-atomic particles accelerated toward Earth by supernova explosions and other violent events in the cosmos. Solar Cosmic Rays are the same, though their source is the Sun.
During solar minimum, like the one we’re entering now, the Sun’s magnetic field weakens and the outward pressure of the solar wind decreases. This allows more cosmic rays from deep space to penetrate our planet’s atmosphere and nucleate more clouds.
“Clouds are the Earth’s sunshade, and if cloud cover changes for any reason, you have global warming — or global cooling.” — Roy W. Spencer Ph.D.
“Today we can demonstrate and prove the Sun’s effect on climate based on a wide range of evidence, from fossils that are hundreds of millions of years old to buoy readings to satellite altimetry data from the past few decades,” Shaviv explained. “We also can reproduce and mimic atmospheric conditions in the laboratory to confirm the evidence.
And unfortunately, the cold times are returning, in line with historically low solar activity.
Image at Top: NASA Solar-Cycle-25-NASA-full.png