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In last week's episode, Monet and Ryochin's fathers, Koji and Shinji, each made big decisions.
In the story, Coming of Age Day is celebrated and winter is in full swing, but there is a proverb about winter weather that goes, "A heavy frost on a moonlit night." Which of the following phenomena does this proverb describe?
The difficulty level is ★★☆☆☆(2/5)! Please give it a try.
"Heavy frost on a moonlit night" means that the morning after a clear moonlit night, there is frost.
If you can see the moon, it means there are no clouds. Clouds absorb heat from the earth's surface and bounce some of it back to the surface, making it difficult for heat to escape from the earth's surface. On a cloudless night when you can see the beautiful moon, there is no insulation effect from the clouds, so the heat from the earth's surface escapes into the sky, and the next morning it is so cold that there is a lot of frost. This phenomenon is called "radiative cooling" (strictly speaking, weather conditions such as weak winds and dry air are also required).
By the way, this proverb is said to warn of the damage caused by frost to crops at dawn on a clear night from late autumn to early spring. The cold weather is about to begin in earnest, so look up at the night sky on your way home and try predicting the weather for the next morning.
[Sources and References]
Weather News "It's too late to ask now? What is the mechanism behind radiation cooling?"
https://weathernews.jp/s/topics/201810/300175/
