放ほう射しゃ冷れい却きゃく

noun

radiative cooling; radiational cooling

A meteorological term referring to the cooling of the Earth's surface and air near the ground due to longwave radiation emission, especially on clear, calm nights.

• 今こん夜やは放ほう射しゃ冷れい却きゃくで冷ひえ込こむでしょう。

  Tonight it will get cold due to radiative cooling.

• 放ほう射しゃ冷れい却きゃくが強つよいと、朝あさ方がたに霜しもが降おりることがあります。

  When radiative cooling is strong, frost may form in the early morning.