Lamb on Sept. 9, 1972 Associated Press article 'There's a new Ice Age coming!': 'We are on a definite downhill course for the next two centuries' - 'Lamb said climate changes come in cycles determined by astronomical and physical factors. He said one main cause is the amount of radiation received from the sun.'
'When there are more cosmic rays, they help create more microscopic cloud nuclei, which in turn form more clouds, which reflect more solar radiation back into space, making Earth cooler than what it normally might be. Conversely, less cosmic rays mean less cloud cover and a warmer planet as indicatedhere. The sun’s magnetic field is said to deflect cosmic rays when its solar magnetic dynamo is more active, and right around the last solar max, we were at an 8000 year high, suggesting more deflected cosmic rays, and warmer temperatures. Now the sun has gone into a record slump, and there are predictions of cooler temperatures ahead This new and important paper is published in Physics Letters'