Quite obvious to everyone who has done at least a cursory review of ancient archaeology and the demographics implied therewith is that rainfall drastically diminished to have caused the “bronze age collapse” beginning in the timeframe of the Exodus, so obviously cloud cover was greatly reduced, and what causes clouds? Of course it’s evaporation off the ocean, the more evaporation the more clouds, for the Ice Age thereby the ocean warmer (having been heated from below during Noah’s Flood).