The best book on the Ice Age and its cause from the Flood Catastrophist point of view is:
"An Ice Age Caused by the Genesis Flood," by Michael J. Oard, 1990, a monograph published by ICR.
Michael Oard is a professional meterologist working for the Naional Weather Service, in Montana.
He addresses all these questions plus hundreds more. He shows how every other proposed cause for Ice ages are totally inadequate. No discussion of the Flood and the Ice Age should be undertaken without reading this book first!