Does this mean that, “counterintuitively”, global cooling will lead to record heat waves?
Just wonderin’
Or, as the earth rotates, does its turning away from the sun cause increased daylight?
Yes. Global cooling could lead to record heat waves in areas not consequently snow-covered. Global cooling would result in or from a lack of water vapor in the atmosphere, which leads to less rainfall in inland locations (especially during the summer). A lack of rainfall and more bright sunlight in turn depletes soil moisture. When the sunshine heats soil depleted of moisture, it heats the soil rather than evaporate the very limited or non-existent soil moisture. The hot soil conducts thermal energy to the air, leading to record high temperatures.
Whereas global cooling should lead to more climatic extremes, especially but not exclusively on the cold side, global warming (if occurring appreciably) would lead to climatic moderation and consequently to higher temperature means but fewer extremes outside a few relatively small areas consequently deprived of moisture.