Cosmic Rays Determine Weather and Climate
Beryllium 10 was my word for the week, and I found it where it should be, at the end of the last ice age. We now know the mechanism of the connection between (Galileo's) sunspots and short-term and long-term climate, and, of course, the weather. The mechanism is cosmic rays, and their modulation is by the Sun's magnetic (sunspot) activity. When the sun is at solar minima, we are not protected from the showering of these high energy subatomic particles, and they help, as a consequence, seed cloud nuclei, leading to more cloud, more precipitation, and eventually colder (different from place to place, it can be hotter in places). Laboratory experiments have demonstrated this mechanism. When the sun is active, as it has been over the last 100 years (coincidence?!), we are shielded from them; but, before then, since the 14th Century, the cosmic rays were more - as measured by isotope Carbon 14 - and as a consequence, it was 'little ice age' cold, with extensive global gl