Now that autumn is upon us, there is a large temperature gap between day and night. This is due to the temperature inversion caused by radiative cooling on the Earth's surface. Heat from the sun during the day causes its temperature to rise and when the sun sets during the night, its temperature cools down. Recently, a research team has demonstrated a daytime radiative cooling effect which exhibits lower temperatures than its surroundings even during the day.
from Latest Science News -- ScienceDaily https://ift.tt/3dJiVup
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